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This paper provides a comprehensive analysis of a steel–glass spindle torus structure based on the prototype of the Jewel Changi Airport, Singapore. Instead of studying a common cuboid building, the research in this paper focuses on a spindle torus shape structure which incorporates tremendous, curved members. Hence, the advanced modeling and structural analysis of this structure provides valuable information about an irregularly shaped building. Meanwhile, the modeling and analysis process of this innovative structure also gives rise to some practical design recommendations for both architects and engineers. In this paper, both global structure stability and local member buckling behavior were studied. With the use of commercial finite element software, Strand7 (R2.4.6) and ABAQUS (6.14), a series of numerical simulations were conducted. In terms of the behavior of the global structure, both numerical spindle torus models incorporating straight and curved steel members were tested under different load combinations specified in Australian building standards. A significant difference was observed between the results of the two models; therefore, research on the individual curved members was undertaken. Regarding the local member buckling behavior, the effective length factor for curved members with braced and sway boundaries conditions was investigated in Strand7. Moreover, the interaction curves of curved beams with different L/R ratios were compared with perfectly straight members in Australian building standards. ABAQUS can provide more precise predictions of local buckling behavior; therefore, the elastic local buckling behavior of the perimeter beams on different levels was investigated using ABAQUS. Additionally, the impacts of boundary conditions and L/R ratios on the beam buckling behavior are discussed.
Faham Tahmasebinia; Youtian Wang; Siyuan Wu; Justin Ho; Weijia Shen; Hongyi Ma; Samad Sepasgozar; Fernando Marroquin. Advanced Structural Analysis of Innovative Steel–Glass Structures with Respect to the Architectural Design. Buildings 2021, 11, 208 .
AMA StyleFaham Tahmasebinia, Youtian Wang, Siyuan Wu, Justin Ho, Weijia Shen, Hongyi Ma, Samad Sepasgozar, Fernando Marroquin. Advanced Structural Analysis of Innovative Steel–Glass Structures with Respect to the Architectural Design. Buildings. 2021; 11 (5):208.
Chicago/Turabian StyleFaham Tahmasebinia; Youtian Wang; Siyuan Wu; Justin Ho; Weijia Shen; Hongyi Ma; Samad Sepasgozar; Fernando Marroquin. 2021. "Advanced Structural Analysis of Innovative Steel–Glass Structures with Respect to the Architectural Design." Buildings 11, no. 5: 208.
This study investigates the local and global stability of the Luzzone Dam. Two finite element models were built; one with foundation rock, the other without. The purpose of this was to demonstrate a potential gulf between rigid connection modelling, and rock–structure interaction (RSI). Strand7 is not a traditional geotechnical finite element model (FEM) program, though performed well when modelling radial displacement on the Luzzone Dam. Generally, the percentage between a rigid base and RSI model displacement was 10%. This result was validated against previous numerical models on the structure. Static loads produced a radial displacement on the crown structure of 9.01 cm. Uneven stress distributions at the base of the structure were shown to be the most unpredictable result. With rigid base connections, these loads produced peak tensile stresses of 10.7 MPa. This was greater than its dynamic counterpart, asking questions about fully fixed restraints. It is noted that this is above yield and should be investigated further. Special attention will be devoted to determining the failure criteria in the simulated dams to suggest better practical guide lines for the practical engineers on site.
Faham Tahmasebinia; Rowan Doskey; Omar Elrich; David Kelly; Samad Sepasgozar; Fernando Marroquin. Assessment of the Local and Global Stability of the Luzzone Arch Dam Including Visualisation of the Data Analysis. Sustainability 2021, 13, 4062 .
AMA StyleFaham Tahmasebinia, Rowan Doskey, Omar Elrich, David Kelly, Samad Sepasgozar, Fernando Marroquin. Assessment of the Local and Global Stability of the Luzzone Arch Dam Including Visualisation of the Data Analysis. Sustainability. 2021; 13 (7):4062.
Chicago/Turabian StyleFaham Tahmasebinia; Rowan Doskey; Omar Elrich; David Kelly; Samad Sepasgozar; Fernando Marroquin. 2021. "Assessment of the Local and Global Stability of the Luzzone Arch Dam Including Visualisation of the Data Analysis." Sustainability 13, no. 7: 4062.
Bamboo is known as a sustainable alternative for green building design, and it has been tied culturally to some regions around the world. However, bamboo’s structural strength for different design scenarios needs more investigation before it is widely adopted. Timber and bamboo have similar mechanical properties, but the latter is a repaid, renewable, sustainable, disaster-resilient system and is versatile, which has more advantages for construction purposes. Natural bamboo and its derivatives have been considered as a high-demand green and environmentally responsible alternative construction material, and this interest is increasing globally. Because of the rapid growth rate and large developing area, it is more useable than the limited timber resource. However, natural bamboo has an anisotropic and nonhomogeneous material property, which varies in multiple directions. There is limited engineering data and investigation of bamboo material and its use in and impact on construction. In this study, three different bamboo models were analyzed by Strand7; each of them had different features in structure and in the major construction material. A new model was proposed by improving the three given structures and was maximized in the mechanical capacity. Some design guidelines were proposed based on the analysis and comparison of different bamboo structures. The model will replace natural bamboo with bamboo scrimber, which is an engineered bamboo derivative that has more uniform material properties.
Faham Tahmasebinia; Yuanchen Ma; Karl Joshua; Saleh Sepasgozar; Yang Yu; Jike Li; Samad Sepasgozar; Fernando Marroquin. Sustainable Architecture Creating Arches Using a Bamboo Grid Shell Structure: Numerical Analysis and Design. Sustainability 2021, 13, 2598 .
AMA StyleFaham Tahmasebinia, Yuanchen Ma, Karl Joshua, Saleh Sepasgozar, Yang Yu, Jike Li, Samad Sepasgozar, Fernando Marroquin. Sustainable Architecture Creating Arches Using a Bamboo Grid Shell Structure: Numerical Analysis and Design. Sustainability. 2021; 13 (5):2598.
Chicago/Turabian StyleFaham Tahmasebinia; Yuanchen Ma; Karl Joshua; Saleh Sepasgozar; Yang Yu; Jike Li; Samad Sepasgozar; Fernando Marroquin. 2021. "Sustainable Architecture Creating Arches Using a Bamboo Grid Shell Structure: Numerical Analysis and Design." Sustainability 13, no. 5: 2598.
Reinforced concrete (RC) members in critical structures, such as bridge piers, high-rise buildings, and offshore facilities, are vulnerable to impact loads throughout their service life. For example, vehicle collisions, accidental loading, or unpredicted attacks could occur. The numerical models presented in this paper are shown to adequately replicate the impact behaviour and damage process of fibre-reinforced polymer (FRP)-strengthened concrete-filled steel tube (CFST) columns and Reinforced Concrete slabs. Validated models are developed using Abaqus/Explicit by reproducing the results obtained from experimental testing on bare CFST and RC slab members. Parameters relating to the FRP and material components are investigated to determine the influence on structural behaviour. The innovative method of using the dissipated energy approach for structural evaluation provides an assessment of the effective use of FRP and material properties to enhance the dynamic response. The outcome of the evaluation, including the geometrical, material, and contact properties modelling, shows that there is an agreement between the numerical and experimental behaviour of the selected concrete members. The experimentation shows that the calibration of the models is a crucial task, which was considered and resulted in matching the force–displacement behaviour and achieving the same maximum impact force and displacement values. Different novel and complicated Finite Element Models were comprehensively developed. The developed numerical models could precisely predict both local and global structural responses in the different reinforced concrete members. The application of the current numerical techniques can be extended to design structural members where there are no reliable practical guidelines on both national and international levels.
Faham Tahmasebinia; Linda Zhang; SangWoo Park; Samad Sepasgozar. Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading. Buildings 2020, 11, 14 .
AMA StyleFaham Tahmasebinia, Linda Zhang, SangWoo Park, Samad Sepasgozar. Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading. Buildings. 2020; 11 (1):14.
Chicago/Turabian StyleFaham Tahmasebinia; Linda Zhang; SangWoo Park; Samad Sepasgozar. 2020. "Numerically Evaluation of FRP-Strengthened Members under Dynamic Impact Loading." Buildings 11, no. 1: 14.
Rock masses consist of various discontinuities that significantly affect the crack development patterns which dominates the ultimate failure of geostructures. The interaction of the pre-existing flaws with each other and with the newly formed cracks is complicated and demands a comprehensive investigation. This paper couples the 3D printing technology with the digital image correlation (DIC) and the bonded particle model (BPM) to study failure of rock-like specimens with pre-existing flaws. Systematic flaws configurations are considered including single, coplanar, partially overlapped and fully overlapped arrangements. The flaws are considered to be unfilled and filled with a weak material. The DIC strain and BPM displacement vectors analysis indicate the strong effects of the filling material on the deformation behaviour of the 3D printed specimens. The failure pattern of the single filled flaws is transformation from compressive failure (0°) to shear failure (15°–60°) and to tensile failure (75°–90°). However, in the coplanar flaws failure is transformation from compressive (0°) to mixed-mode compressive shear (15°-30°), then to shear (45°), to mixed-mode tensile-shear (60°–75°) and then to pure tensile (90°). However, the partially coplanar filled flaws all (except 0° which is compressive failure) exhibit mixed-mode failure in the order of compressive-shear (15°–30°) and transformation to the tensile-shear (45°–90°). BPM displacement vectors revealed five crack types in the specimens by the analysis of the relative movement of the vectors in some critical locations such as flaws tips, rock bridge and coalescence zone. Moreover, a new coalescence type was identified in the 15° flaw (either unfilled or filed) which is named Type X and is a mixed-mode shear tensile crack with a coplanar secondary shear crack. Furthermore, it is observed that the peak load of the filled specimens are much higher than that of the unfilled ones because the filling material requires extra energy to fracture and thus the filled specimens can carry larger load before fail.
Mansour Sharafisafa; Zeinab Aliabadian; Faham Tahmasebinia; Luming Shen. A comparative study on the crack development in rock-like specimens containing unfilled and filled flaws. Engineering Fracture Mechanics 2020, 241, 107405 .
AMA StyleMansour Sharafisafa, Zeinab Aliabadian, Faham Tahmasebinia, Luming Shen. A comparative study on the crack development in rock-like specimens containing unfilled and filled flaws. Engineering Fracture Mechanics. 2020; 241 ():107405.
Chicago/Turabian StyleMansour Sharafisafa; Zeinab Aliabadian; Faham Tahmasebinia; Luming Shen. 2020. "A comparative study on the crack development in rock-like specimens containing unfilled and filled flaws." Engineering Fracture Mechanics 241, no. : 107405.
The aim of this paper is to examine students’ performance in a computation-based course by evaluating the effects of key factors including sketching, visualization resources provided to them during the lectures, their attendance and tutors’ experience. A systematic review was conducted including 192 articles published during January 2010 to December 2019. Further, a case study has been conducted in which 633 students from non-engineering backgrounds were taught a core course of construction over three-yearly sessions from 2017 to 2019. The performance has been assessed through two quizzes of 10% weight each, assignment of 40% weight and a final exam with 30% weight in 2017-18 and 40% weight in 2019 were utilized with an attendance criterion of below 75% as low attendance. The statistical result highlights that a clear difference of 14% overall marks exist between the students with less than 75% attendance and the ones with 75% and above in 2017 and a 10% gap in 2018. Students with high marks in sketching secured higher overall marks as compared to others highlighting that the sketching skill is useful to construction students. The findings contribute to the body of education knowledge by evaluating key influential factors and provide a useful benchmark to other educators in the field.
Fahim Ullah; Samad Sepasgozer; Faham Tahmasebinia; Samad M. E. Sepasgozar; Steven Davis. Examining the impact of students’ attendance, sketching, visualization, and tutors experience on students’ performance: a case of building structures course in construction management. Construction Economics and Building 2020, 20, 1 .
AMA StyleFahim Ullah, Samad Sepasgozer, Faham Tahmasebinia, Samad M. E. Sepasgozar, Steven Davis. Examining the impact of students’ attendance, sketching, visualization, and tutors experience on students’ performance: a case of building structures course in construction management. Construction Economics and Building. 2020; 20 (3):1.
Chicago/Turabian StyleFahim Ullah; Samad Sepasgozer; Faham Tahmasebinia; Samad M. E. Sepasgozar; Steven Davis. 2020. "Examining the impact of students’ attendance, sketching, visualization, and tutors experience on students’ performance: a case of building structures course in construction management." Construction Economics and Building 20, no. 3: 1.
This chapter reports on the finite element analysis of the “earthscraper,” proposed by BNKR Arquitectura. It was proposed as an alternative building method for the future, as it requires less surface area and lower operating costs than an equivalent aboveground structure. A 2D model of the cross section of the structure was created using Strand7 for steady-state thermal analysis. This solver gave internal temperature ranging between 20 and 38°C between the bottom apex and the surface, respectively. This provides a comfortable temperature by default, displaying the lesser dependency on heating and cooling costs. A 3D model was also created to analyze the effect of lateral earth pressure by the use of the linear static solver. Results give a maximum lateral displacement of 527 mm and 19.8 mm on the exterior and interior walls, respectively. The model was used for earthquake analysis in accordance with AS/NZS1170.4, requiring the natural frequency and spectral response solvers. Twenty-five modal frequencies were found, with 99.6% of the mass of the structure contributing to the direction under analysis. The maximum horizontal displacement of the structure under the designed earthquake loads was found to be 19.2 mm.
Faham Tahmasebinia; Kevin Yu; Jiachen Bao; George Chammoun; Edwin Chang; Samad Sepasgozar; Fernando Alonso Marroquin. Earthscraper: A Smart Solution for Developing Future Underground Cities. Smart Cities and Construction Technologies 2020, 1 .
AMA StyleFaham Tahmasebinia, Kevin Yu, Jiachen Bao, George Chammoun, Edwin Chang, Samad Sepasgozar, Fernando Alonso Marroquin. Earthscraper: A Smart Solution for Developing Future Underground Cities. Smart Cities and Construction Technologies. 2020; ():1.
Chicago/Turabian StyleFaham Tahmasebinia; Kevin Yu; Jiachen Bao; George Chammoun; Edwin Chang; Samad Sepasgozar; Fernando Alonso Marroquin. 2020. "Earthscraper: A Smart Solution for Developing Future Underground Cities." Smart Cities and Construction Technologies , no. : 1.
A floating cities bridge is designed to connect two floating cities or nearby land to resolve the problem of shortage of construction land due to an increase of population and sea level. The Yumemai floating bridge is referenced as a sample structure; the member sizes and dimensions are modified to suit the need of the project. A finite element structure is built using Strand7, which includes dead load, live load, tidal wave, and wind load. Based on the loads, both static and dynamic analyses are conducted to determine the stress and deflection of the structure. The report outlines the modeling techniques, element types, and analysis solvers used in modeling and analyzing the structure. This report discusses the results obtained from the analysis. The advanced material with low density applied is introduced, which has a good resistance of corrosion and high strength. The main objective of the current chapter is to suggest and design the procedure which can be used as floating structural elements in the future.
Faham Tahmasebinia; Yutaka Tsumura; Baichuan Wang; Yang Wen; Cheng Bao; Samad Sepasgozar; Fernando Alonso-Marroquin. Floating Cities Bridge in 2050. Smart Cities and Construction Technologies 2020, 1 .
AMA StyleFaham Tahmasebinia, Yutaka Tsumura, Baichuan Wang, Yang Wen, Cheng Bao, Samad Sepasgozar, Fernando Alonso-Marroquin. Floating Cities Bridge in 2050. Smart Cities and Construction Technologies. 2020; ():1.
Chicago/Turabian StyleFaham Tahmasebinia; Yutaka Tsumura; Baichuan Wang; Yang Wen; Cheng Bao; Samad Sepasgozar; Fernando Alonso-Marroquin. 2020. "Floating Cities Bridge in 2050." Smart Cities and Construction Technologies , no. : 1.
Coal burst occurrences are affected by a range of mining and geological factors. Excessive slipping between the strata layers may release a considerable amount of strain energy, which can be destructive. A competent strata is also more vulnerable to riveting a large amount of strain energy. If the stored energy in the rigid roof reaches a certain level, it will be released suddenly which can create a serious dynamic reaction leading to coal burst incidents. In this paper, a new damage model based on the modified thermomechanical continuum constitutive model in coal mass and the contact layers between the rock and coal mass is proposed. The original continuum constitutive model was initially developed for the cemented granular materials. The application of the modified continuum constitutive model is the key aspect to understand the momentum energy between the coal–rock interactions. The transformed energy between the coal mass and different strata layers will be analytically demonstrated as a function of the rock/joint quality interaction conditions. The failure and post failure in the coal mass and coal–rock joint interaction will be classified by the coal mass crushing, coal–rock interaction damage and fragment reorganisation. The outcomes of this paper will help to forecast the possibility of the coal burst occurrence based on the interaction between the coal mass and the strata layers in a coal mine.
Faham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Samad Sepasgozar; Serkan Saydam. A Novel Damage Model for Strata Layers and Coal Mass. Energies 2020, 13, 1928 .
AMA StyleFaham Tahmasebinia, Chengguo Zhang, Ismet Canbulat, Samad Sepasgozar, Serkan Saydam. A Novel Damage Model for Strata Layers and Coal Mass. Energies. 2020; 13 (8):1928.
Chicago/Turabian StyleFaham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Samad Sepasgozar; Serkan Saydam. 2020. "A Novel Damage Model for Strata Layers and Coal Mass." Energies 13, no. 8: 1928.
The dynamic capacity of a support system is dependent on the connectivity and compatibility of its reinforcement and surface support elements. Connectivity refers to the capacity of a system to transfer the dynamic load from an element to another, for example, from the reinforcement to the surface support through plates and terminating arrangements (split set rings, nuts, etc.), or from a reinforcement/holding element to others via the surface support. Compatibility is related to the difference in stiffness amongst support elements. Load transfer may not take place appropriately when there are strong stiffness contrasts within a ground support system. Case studies revealed premature failures of stiffer elements prior to utilising the full capacity of more deformable elements within the same system. From a design perspective, it is important to understand that the dynamic-load capacity of a ground support system depends not only on the capacity of its reinforcement elements but also, and perhaps most importantly, on their compatibility with other elements of the system and on the strength of the connections. The failure of one component of the support system usually leads to the failure of the system.
Faham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Samad M.E. Sepasgozar; Onur Vardar; Serkan Saydam; Chen Chen. A New Concept to Numerically Evaluate the Performance of Yielding Support under Impulsive Loading. Computational Models in Engineering 2020, 1 .
AMA StyleFaham Tahmasebinia, Chengguo Zhang, Ismet Canbulat, Samad M.E. Sepasgozar, Onur Vardar, Serkan Saydam, Chen Chen. A New Concept to Numerically Evaluate the Performance of Yielding Support under Impulsive Loading. Computational Models in Engineering. 2020; ():1.
Chicago/Turabian StyleFaham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Samad M.E. Sepasgozar; Onur Vardar; Serkan Saydam; Chen Chen. 2020. "A New Concept to Numerically Evaluate the Performance of Yielding Support under Impulsive Loading." Computational Models in Engineering , no. : 1.
Bamboo is emerging as a lightweight, versatile and renewable material that is projected to realise new methods of construction. There is a growing demand for using bamboo in different regions across the world. However, there are no specific design standards or guidelines that capitalise on the unique circular hollow cross section and internal nodal support of bamboo. Furthermore, there has been no strict analysis into how the curvature of bamboo members can help to better distribute stress through a structure. Bamboo is known as a more environmentally sustainable material than standard timber; however, due to the naturally occurring diaphragm nodal structure, it is less orthotropic in mechanical behaviour, with more out of plane stiffness than timber. To address this issue, this paper presents finite element analysis of three varying bamboo structures, each featuring a varying member curvature and lateral support system. In this paper, a preliminary set of design guidelines have been proposed for bamboo members, maximising the performance of its inherent mechanical properties. These guidelines propose the use of thick, low diameter bamboo members in axial loading and thin, high diameter members in flexural situations. Where available, the preliminary guidelines introduce the importance of curved bamboo members to uniformly distribute forces and crossing arched members to eliminate the need for lateral support systems, thereby reducing the total material required for construction. Finally, this report presents some novel consideration of the out-of-plane buckling of curved bamboo members–although for this purpose it does not consider the effect of the diaphragm components of bamboo, a source of future research and more comprehensive design guidelines.
Faham Tahmasebinia; Rory McDougall; Samad Sepasgozar; Emma Abberton; Gi Houn Joung; Maria Paula Joya; Saleh Mohammad Ebrahimzadeh Sepasgozar; Fernando Alonso Marroquin. Development of Preliminary Curved Bamboo Member Design Guidelines through Finite Element Analysis. Sustainability 2020, 12, 822 .
AMA StyleFaham Tahmasebinia, Rory McDougall, Samad Sepasgozar, Emma Abberton, Gi Houn Joung, Maria Paula Joya, Saleh Mohammad Ebrahimzadeh Sepasgozar, Fernando Alonso Marroquin. Development of Preliminary Curved Bamboo Member Design Guidelines through Finite Element Analysis. Sustainability. 2020; 12 (3):822.
Chicago/Turabian StyleFaham Tahmasebinia; Rory McDougall; Samad Sepasgozar; Emma Abberton; Gi Houn Joung; Maria Paula Joya; Saleh Mohammad Ebrahimzadeh Sepasgozar; Fernando Alonso Marroquin. 2020. "Development of Preliminary Curved Bamboo Member Design Guidelines through Finite Element Analysis." Sustainability 12, no. 3: 822.
This paper presents a preliminary finite element model in Strand7 software to analyse creep and shrinkage effects on the prestressed concrete ribs of the Sydney Opera House as remarkable heritage. A linear static analysis was performed to investigate the instantaneous impacts of dead and wind loads on the complex concrete structure which was completed in 1973. A quasistatic analysis was performed to predict the effects of creep and shrinkage due to dead load on the structure in 2050 to discern its longevity. In 2050, the Sydney Opera House is expected to experience 0.090% element strain due to creep and shrinkage and therefore suffer prestress losses of 32.59 kN per strand. However, given that the current time after prestress loading is approximately 50 years, the majority of creep and shrinkage effects have already taken place with 0.088% strain and 32.12 kN of prestress losses. The analysis concludes that very minor structural impacts are expected over the next 30 years due to creep and shrinkage, suggesting a change in conservation focus from large structural concerns to inspection and maintenance of minor issues of surface cracking and water ingress. The analysis is the first step in the application of more complex finite element modelling of the structure with the integration of complex building information models. The main motivation to undertake the current numerical simulation is to determine a cost-effective solution when it comes to the long-term time-dependent analysis. The paper also will suggest future directions for monitoring unique historical buildings, including ‘digital twin’.
Faham Tahmasebinia; Daniel Fogerty; Lang Oliver Wu; Zhichao Li; Saleh Mohammad Ebrahimzadeh Sepasgozar; Kai Zhang; Samad Sepasgozar; Fernando Alonso Marroquin. Numerical Analysis of the Creep and Shrinkage Experienced in the Sydney Opera House and the Rise of Digital Twin as Future Monitoring Technology. Buildings 2019, 9, 137 .
AMA StyleFaham Tahmasebinia, Daniel Fogerty, Lang Oliver Wu, Zhichao Li, Saleh Mohammad Ebrahimzadeh Sepasgozar, Kai Zhang, Samad Sepasgozar, Fernando Alonso Marroquin. Numerical Analysis of the Creep and Shrinkage Experienced in the Sydney Opera House and the Rise of Digital Twin as Future Monitoring Technology. Buildings. 2019; 9 (6):137.
Chicago/Turabian StyleFaham Tahmasebinia; Daniel Fogerty; Lang Oliver Wu; Zhichao Li; Saleh Mohammad Ebrahimzadeh Sepasgozar; Kai Zhang; Samad Sepasgozar; Fernando Alonso Marroquin. 2019. "Numerical Analysis of the Creep and Shrinkage Experienced in the Sydney Opera House and the Rise of Digital Twin as Future Monitoring Technology." Buildings 9, no. 6: 137.
Three-dimensional (3D) printing technologies are transforming the design and manufacture of components and products across many disciplines, but their application in the construction industry is still limited. Material deposition processes can achieve infinite geometries. They have advanced from rapid prototyping and model-scale markets to applications in the fabrication of functional products, large objects, and the construction of full-scale buildings. Many international projects have been realised in recent years, and the construction industry is beginning to make use of such dynamic technologies. Advantages of integrating 3D printing with house construction are significant. They include the capacity for mass customisation of designs and parameters to meet functional and aesthetic purposes, the reduction in construction waste from highly precise placement of materials, and the use of recycled waste products in layer deposition materials. With the ultimate goal of improving construction efficiency and decreasing building costs, the researchers applied Strand 7 Finite Element Analysis software to a numerical model designed for 3D printing a cement mix that incorporates the recycled waste product high-density polyethylene (HDPE). The result: construction of an arched, truss-like roof was found to be structurally feasible in the absence of steel reinforcements, and lab-sized prototypes were manufactured according to the numerical model with 3D printing technology. 3D printing technologies can now be customised to building construction. This paper discusses the applications, advantages, limitations, and future directions of this innovative and viable solution to affordable housing construction.
Faham Tahmasebinia; Marjo Niemelä; Sanee Mohammad Ebrahimzadeh Sepasgozar; Tin Yiu Lai; Winson Su; Kakarla Raghava Reddy; Sara Shirowzhan; Samad Sepasgozar; Fernando Alonso Marroquin. Three-Dimensional Printing Using Recycled High-Density Polyethylene: Technological Challenges and Future Directions for Construction. Buildings 2018, 8, 165 .
AMA StyleFaham Tahmasebinia, Marjo Niemelä, Sanee Mohammad Ebrahimzadeh Sepasgozar, Tin Yiu Lai, Winson Su, Kakarla Raghava Reddy, Sara Shirowzhan, Samad Sepasgozar, Fernando Alonso Marroquin. Three-Dimensional Printing Using Recycled High-Density Polyethylene: Technological Challenges and Future Directions for Construction. Buildings. 2018; 8 (11):165.
Chicago/Turabian StyleFaham Tahmasebinia; Marjo Niemelä; Sanee Mohammad Ebrahimzadeh Sepasgozar; Tin Yiu Lai; Winson Su; Kakarla Raghava Reddy; Sara Shirowzhan; Samad Sepasgozar; Fernando Alonso Marroquin. 2018. "Three-Dimensional Printing Using Recycled High-Density Polyethylene: Technological Challenges and Future Directions for Construction." Buildings 8, no. 11: 165.
Designing reliable yielding support system to mitigate the effect of the kinetic energy in burst-prone conditions in mining and tunneling excavations is one of the challenges for geotechnical engineers. A combination of the support elements can be used to increase rock strength and minimise the displacement of unstable rock mass. It is important to understand how the support system works to ensure the stability of underground excavations. Cable bolts have been commonly used as an effective underground support system and an element of reinforcement to improve rock stability. Cable bolts are usually considered to be subjected to static loads under relatively low stress environments, however, in burst-prone conditions, they might be subjected to dynamic loads. Cable bolts as well as other support elements are used in burst-prone conditions to absorb the kinetic energy of the removed rock to avoid sudden and violent failures. This paper develops numerical and a novel analytical simulation technique for cable bolts to assess their structural behaviour under static and dynamic loading conditions. The numerical and analytical models are then validated against experimental observations reported in the literature, which demonstrates the reliability of the proposed models.
Faham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Onur Vardar; Serkan Saydam. Numerical and analytical simulation of the structural behaviour of fully grouted cable bolts under impulsive loading. International Journal of Mining Science and Technology 2018, 28, 807 -811.
AMA StyleFaham Tahmasebinia, Chengguo Zhang, Ismet Canbulat, Onur Vardar, Serkan Saydam. Numerical and analytical simulation of the structural behaviour of fully grouted cable bolts under impulsive loading. International Journal of Mining Science and Technology. 2018; 28 (5):807-811.
Chicago/Turabian StyleFaham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Onur Vardar; Serkan Saydam. 2018. "Numerical and analytical simulation of the structural behaviour of fully grouted cable bolts under impulsive loading." International Journal of Mining Science and Technology 28, no. 5: 807-811.
Coal joints and cleats are geological discontinuities that are the most important factors that affect the mechanical responses of a coal mass under stress. The joint and coal mass interaction and the mode of failure dominate the mechanical behaviour of jointed coal masses, and therefore the stability of coal excavations. The shear or mixed shear/tensile failure changes to tensile failure by increasing the confining pressure, discontinuity length and angle. This paper extends a thermodynamic approach to constitutive modelling of the coal mass by developing local and non-local damage models based on the joint and cleat density and the dip angle. A consistent and rigorous statistical framework is constructed, which incorporates both local and non-local features into the constitutive modelling. This is an important consideration in developing damage constitutive models based on the trajectory of the failure surfaces in a coal mass. An equation is derived to calculate the fracture energy which is a function of the joint density either in a single direction or crossed conditions.
Faham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Onur Vardar; Serkan Saydam. Computing the damage and fracture energy in a coal mass based on joint density. International Journal of Mining Science and Technology 2018, 28, 813 -817.
AMA StyleFaham Tahmasebinia, Chengguo Zhang, Ismet Canbulat, Onur Vardar, Serkan Saydam. Computing the damage and fracture energy in a coal mass based on joint density. International Journal of Mining Science and Technology. 2018; 28 (5):813-817.
Chicago/Turabian StyleFaham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Onur Vardar; Serkan Saydam. 2018. "Computing the damage and fracture energy in a coal mass based on joint density." International Journal of Mining Science and Technology 28, no. 5: 813-817.
Faham Tahmasebinia; Samad Mohammad Ebrahimzadeh Sepasgozar; Hannah Blum; Kakarla Raghava Reddy; Fernando Alonso-Marroquin; Qile Gao; Yang Hu; Xu Wang; Zhongzheng Wang. The Feasibility of Constructing Super-Long-Span Bridges with New Materials in 2050. Bridge Engineering 2018, 1 .
AMA StyleFaham Tahmasebinia, Samad Mohammad Ebrahimzadeh Sepasgozar, Hannah Blum, Kakarla Raghava Reddy, Fernando Alonso-Marroquin, Qile Gao, Yang Hu, Xu Wang, Zhongzheng Wang. The Feasibility of Constructing Super-Long-Span Bridges with New Materials in 2050. Bridge Engineering. 2018; ():1.
Chicago/Turabian StyleFaham Tahmasebinia; Samad Mohammad Ebrahimzadeh Sepasgozar; Hannah Blum; Kakarla Raghava Reddy; Fernando Alonso-Marroquin; Qile Gao; Yang Hu; Xu Wang; Zhongzheng Wang. 2018. "The Feasibility of Constructing Super-Long-Span Bridges with New Materials in 2050." Bridge Engineering , no. : 1.
Numerically and Analytically Forecasting the Coal Burst Using Energy Based Approach Methods | InTechOpen, Published on: 2018-02-28. Authors: Faham Tahmasebinia, Chengguo Zhang, Ismet Canbulat, et
Faham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Onur Vardar; Serkan Saydam. Numerically and Analytically Forecasting the Coal Burst Using Energy Based Approach Methods. Finite Element Method - Simulation, Numerical Analysis and Solution Techniques 2018, 1 .
AMA StyleFaham Tahmasebinia, Chengguo Zhang, Ismet Canbulat, Onur Vardar, Serkan Saydam. Numerically and Analytically Forecasting the Coal Burst Using Energy Based Approach Methods. Finite Element Method - Simulation, Numerical Analysis and Solution Techniques. 2018; ():1.
Chicago/Turabian StyleFaham Tahmasebinia; Chengguo Zhang; Ismet Canbulat; Onur Vardar; Serkan Saydam. 2018. "Numerically and Analytically Forecasting the Coal Burst Using Energy Based Approach Methods." Finite Element Method - Simulation, Numerical Analysis and Solution Techniques , no. : 1.
In underground mining, it is not currently feasible to forecast a coal burst incident. A coal burst usually includes suddenly abrupt energy release in line with the significant deformed shape in a coal mass as well as coal ejection. The major source of the released energy is the energy stored in the coal. The effect of geological characteristics in the coal on the possible released energy due to material and joint damping is classified as a current silent issue. Therefore, innovative research is needed to understand the influence of coal’s joint and cleat characters (directions and densities) on the possible energy release and/or dissipation. A simple and novel analytical solution is developed in this paper to calculate the amount of released energy due to varying joint density. A broad validation is conducted by comparing the outcomes of the developed analytical model with the results of a three-dimensional numerical simulation using the commercial discrete element package 3DEC. An appropriate agreement has been observed between the results from the numerical modelling and the suggested closed form solution. The paper derives a novel analytical solution to calculate the amount of released energy in coal with different joint densities.
Chengguo Zhang; Faham Tahmasebinia; Ismet Canbulat; Onur Vardar; Serkan Saydam. Analytical Determination of Energy Release in a Coal Mass. Energies 2018, 11, 285 .
AMA StyleChengguo Zhang, Faham Tahmasebinia, Ismet Canbulat, Onur Vardar, Serkan Saydam. Analytical Determination of Energy Release in a Coal Mass. Energies. 2018; 11 (2):285.
Chicago/Turabian StyleChengguo Zhang; Faham Tahmasebinia; Ismet Canbulat; Onur Vardar; Serkan Saydam. 2018. "Analytical Determination of Energy Release in a Coal Mass." Energies 11, no. 2: 285.
Coal burst is a sudden and violent rock/coal failure that occurs in underground coal mines. It is considered to be a highly catastrophic phenomenon which can cause significant damage to mine workings and equipment as well as result in multiple fatalities. Throughout the history of underground pillar design, the relation between the post-peak behavior of pillars and stiffness of the surrounding strata has been extensively studied. These two concepts play an important role in determining the failure mode of the coal pillars and the amount of potential energy that can be converted to kinetic energy, which is the cause of coal burst. In this paper, the post-peak behavior of pillars and surrounding strata stiffness are reviewed and the criterion developed to investigate the instability of the pillar failures is explained. It is concluded that, as the pillar width to mining height (w/h) ratio increases, its post-peak modulus increases; and a pillar exhibits different failure modes for various w/h ratios.
O. Vardar; Faham Tahmasebinia; C. Zhang; I. Canbulat; S. Saydam. A Review of Uncontrolled Pillar Failures. Procedia Engineering 2017, 191, 631 -637.
AMA StyleO. Vardar, Faham Tahmasebinia, C. Zhang, I. Canbulat, S. Saydam. A Review of Uncontrolled Pillar Failures. Procedia Engineering. 2017; 191 ():631-637.
Chicago/Turabian StyleO. Vardar; Faham Tahmasebinia; C. Zhang; I. Canbulat; S. Saydam. 2017. "A Review of Uncontrolled Pillar Failures." Procedia Engineering 191, no. : 631-637.
© 2016 Coal burst is a dynamic release of energy within the rock (or coal) mass leading to high velocity expulsion of the broken/failed material into mine openings. This phenomenon has been recognised as one of the most catastrophic failures associated with the coal mining industry, which can often lead to injuries and fatalities of miners as well as significant production losses. This paper aims to examine the mechanisms contributing to coal burst occurrence, with an emphasis on the energy release concept. In this study, a numerical modelling study has been conducted to evaluate the roles and contributions of difference energy components. The energy analysis presented in this paper can help to improve the understanding of energy release mechanisms especially under Australian conditions
Chengguo Zhang; Ismet Canbulat; Faham Tahmasebinia; Bruce Hebblewhite. Assessment of energy release mechanisms contributing to coal burst. International Journal of Mining Science and Technology 2017, 27, 43 -47.
AMA StyleChengguo Zhang, Ismet Canbulat, Faham Tahmasebinia, Bruce Hebblewhite. Assessment of energy release mechanisms contributing to coal burst. International Journal of Mining Science and Technology. 2017; 27 (1):43-47.
Chicago/Turabian StyleChengguo Zhang; Ismet Canbulat; Faham Tahmasebinia; Bruce Hebblewhite. 2017. "Assessment of energy release mechanisms contributing to coal burst." International Journal of Mining Science and Technology 27, no. 1: 43-47.