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Professor Kim studied Construction Engineering and Management at the department of architectural engineering, Seoul National University. He has joined three Korean construction firms, Daelim Industrial Co., Ltd., Daedong Corporation Co., Ltd., and Seoktop Construction Co., for 12 years. As a visiting scholar, he researched construction management and organization at the Department of Civil Engineering, Stanford University, from 1994 to 1995. Since September, 1995, he has served at Kyung Hee University as a professor. Kim has concentrated on research such as sustainable construction technology and management, freeform building technology, health performance evaluation of buildings, and construction information technology.
According to a report published in 2019 by the United Nations Environment Program (UNEP), the building sector accounts for 38% of all energy-related CO2 emissions when adding building construction industry emissions.
Sunkuk Kim. Technology and Management for Sustainable Buildings and Infrastructures. Sustainability 2021, 13, 9380 .
AMA StyleSunkuk Kim. Technology and Management for Sustainable Buildings and Infrastructures. Sustainability. 2021; 13 (16):9380.
Chicago/Turabian StyleSunkuk Kim. 2021. "Technology and Management for Sustainable Buildings and Infrastructures." Sustainability 13, no. 16: 9380.
Rebar, the core resource of reinforced concrete structures, generates more carbon dioxide per unit weight than any other construction resource. Therefore, reducing rebar cutting wastes greatly contributes to the reduction of greenhouse gas (GHG). Over the past decades, many studies have been conducted to minimize cutting wastes, and various optimization algorithms have been proposed. However, the reality is that about 3 to 5% of cutting wastes are still generated. In this paper, the trends in the research on cutting waste minimization (CWM) of rebar for sustainable work are reviewed in a systematic method with meta-analysis. So far, the literature related to cutting waste minimization or optimization of rebar published has been identified, screened, and selected for eligibility by Preferred Reporting Items for Systematic Reviews and Meta-Analyses, and the final 52 records have been included in quantitative and qualitative syntheses. Review by meta-analysis was conducted on selected literatures, and the results were discussed. The findings identified after reviewing the literature are: (1) many studies have performed optimization for the market length, making it difficult to realize near-zero cutting wastes; (2) to achieve near-zero cutting wastes, rebars must be matched to a specific length by partially adjusting the lap splice position (LSP); (3) CWM is not a one-dimensional problem but an n-dimensional cutting stock problem when considering several rebar combination conditions; and (4) CWM should be dealt with in terms of sustainable value chain management in terms of GHG contributions.
Keehoon Kwon; Doyeong Kim; Sunkuk Kim. Cutting Waste Minimization of Rebar for Sustainable Structural Work: A Systematic Literature Review. Sustainability 2021, 13, 5929 .
AMA StyleKeehoon Kwon, Doyeong Kim, Sunkuk Kim. Cutting Waste Minimization of Rebar for Sustainable Structural Work: A Systematic Literature Review. Sustainability. 2021; 13 (11):5929.
Chicago/Turabian StyleKeehoon Kwon; Doyeong Kim; Sunkuk Kim. 2021. "Cutting Waste Minimization of Rebar for Sustainable Structural Work: A Systematic Literature Review." Sustainability 13, no. 11: 5929.
The site analysis performed in the last ten years has found that building defects result from inconsistent decision-making and performance in the design, construction, and curing (DCC) processes. Therefore, for sustainable quality control, DCC integrated analysis and the management of causes by type and response measures should be in place. The objective of this study is to propose DCC integrated management of defects in finishing works of apartment buildings. To this end, the study surveyed 69,944 defects from 3299 apartment households and analyzed the defect types and causes by project stage. As a result, in the case of opening work (WT1), opening and closing (DT1) accounted for the highest proportion at 35.7%. In the case of furnishing work (WT2), floor installation (DT1) has the most defects. Moreover, the proposed integrated defect management technique was applied onsite, which resulted in an improvement where the defect frequency decreased by 56.80%. The results of this study will be used as the basic data for high-quality finishing projects, and the proposed management concept can be used as reference data in the establishment of a defect management system.
Seogun Yoon; Seunghyun Son; Sunkuk Kim. Design, Construction, and Curing Integrated Management of Defects in Finishing Works of Apartment Buildings. Sustainability 2021, 13, 5382 .
AMA StyleSeogun Yoon, Seunghyun Son, Sunkuk Kim. Design, Construction, and Curing Integrated Management of Defects in Finishing Works of Apartment Buildings. Sustainability. 2021; 13 (10):5382.
Chicago/Turabian StyleSeogun Yoon; Seunghyun Son; Sunkuk Kim. 2021. "Design, Construction, and Curing Integrated Management of Defects in Finishing Works of Apartment Buildings." Sustainability 13, no. 10: 5382.
Various studies have confirmed that the increasing quality of safety climate has a positive influence on reducing the occurrence of accidents. The quality of safety climate is comprehensively affected in three domains: management, site, and enterprise. At the company level, it is challenging to manage all areas at a high level due to limited managerial resources. Therefore, it is necessary to establish a strategy that improves the safety climate step by step. For the efficient execution of the strategy, it is necessary to analyze the relative importance of each evaluation factor of the safety climate and allocate managerial resources accordingly. Therefore, this study aims to analyze the relative importance of safety climate evaluation factors using the analytical hierarchical process (AHP) technique. For this study, AHP questionnaire and analysis are conducted, and the relative priorities of safety climate evaluation factors are derived. As a result, (E) workers’ safety priority and risk non-acceptance is the most important dimension among seven dimensions as the weight is 0.1900. In addition, (E1) compliance with safety regulations, even if the process is tight, is the most important one between items as the weight 0.6663. The results of this study will be used as basic data for institutional improvement and policy making for a high-quality safety climate at construction sites.
Hyunjin Lim; Sunkuk Kim; Yonggu Kim; Seunghyun Son. Relative Importance Analysis of Safety Climate Evaluation Factors Using Analytical Hierarchical Process (AHP). Sustainability 2021, 13, 4212 .
AMA StyleHyunjin Lim, Sunkuk Kim, Yonggu Kim, Seunghyun Son. Relative Importance Analysis of Safety Climate Evaluation Factors Using Analytical Hierarchical Process (AHP). Sustainability. 2021; 13 (8):4212.
Chicago/Turabian StyleHyunjin Lim; Sunkuk Kim; Yonggu Kim; Seunghyun Son. 2021. "Relative Importance Analysis of Safety Climate Evaluation Factors Using Analytical Hierarchical Process (AHP)." Sustainability 13, no. 8: 4212.
The accident rate in Korean construction industry is much higher compared to the one in other industries. One of the main reasons for this problem is the health and safety management cost (HSC) estimation method which does not reflect the project features at construction sites. In Korea, health and safety management cost is estimated by applying a legally designated ratio in proportion to construction cost without reflecting construction features, such as the building’s shape, number of floors, and construction period. However, such a method does not fulfill the cost for the gradually strengthening safety management of high-rise residential buildings. Therefore, the objective of this paper is to develop a cost assessment model for sustainable health and safety management of high-rise residential buildings. For this purpose, actual data of 23 completed projects was collected and analyzed to identify problems and influence factors of HSC assessment and to establish a regression model. By applying the model established for five new sites as a case, its validation was verified. The results of this study will be utilized as reference data for the HSC estimation method and its relevant policy establishment.
Hyunsoo Ahn; Seunghyun Son; Kwangheon Park; Sunkuk Kim. Cost assessment model for sustainable health and safety management of high-rise residential buildings in Korea. Journal of Asian Architecture and Building Engineering 2021, 1 -12.
AMA StyleHyunsoo Ahn, Seunghyun Son, Kwangheon Park, Sunkuk Kim. Cost assessment model for sustainable health and safety management of high-rise residential buildings in Korea. Journal of Asian Architecture and Building Engineering. 2021; ():1-12.
Chicago/Turabian StyleHyunsoo Ahn; Seunghyun Son; Kwangheon Park; Sunkuk Kim. 2021. "Cost assessment model for sustainable health and safety management of high-rise residential buildings in Korea." Journal of Asian Architecture and Building Engineering , no. : 1-12.
The construction industry is recognized as a major cause of environmental pollution, and it is important to quantify and evaluate building energy. As interest in big data has increased over the past 20 years, research using big data is active. However, the links and contents of much literature have not been summarized, and systematic literature studies are insufficient. The objective of this study was a holistic review of building energy efficiency/reduction based on big data. This review study used a holistic analysis approach method framework. As a result of the analysis, China, the Republic of Korea, and the USA had the most published papers, and the simulation and optimization area occupied the highest percentage with 33.33%. Most of the researched literature was papers after 2015, and it was analyzed because many countries introduced environmental policies after the 2015 UN Conference on Climate Change. This study can be helpful in understanding the current research progress to understand the latest trends and to set the direction for further research related to big data.
Jeeyoung Lim; Joseph Kim; Sunkuk Kim. A Holistic Review of Building Energy Efficiency and Reduction Based on Big Data. Sustainability 2021, 13, 2273 .
AMA StyleJeeyoung Lim, Joseph Kim, Sunkuk Kim. A Holistic Review of Building Energy Efficiency and Reduction Based on Big Data. Sustainability. 2021; 13 (4):2273.
Chicago/Turabian StyleJeeyoung Lim; Joseph Kim; Sunkuk Kim. 2021. "A Holistic Review of Building Energy Efficiency and Reduction Based on Big Data." Sustainability 13, no. 4: 2273.
Maintaining shape accuracy in the production of concrete panels of free-form buildings is time-consuming and costly. In addition, disposable molds used for free-form panels are not sustainable. Such problems can be solved by developing a suitable computerized numeric control (CNC) machine that can produce an accurately shaped reusable form for free-form concrete materials in a short period of time. This project develops a production technology of quality free-form concrete panels using a CNC machine and verifies the shape quality through an experiment. We designed a multi-point press CNC machine and verified its quality. The CNC machine implements a smooth free-form shape by changing the shape of the silicon plate by movement of the rods. The silicone plate for the CNC machine generates a slight error due to the elastic cover and mechanical clearance. The mean error rate was within 3%, based on the thickness of the panels, at the 95% confidence level. Verification of these errors will provide meaningful information to a similar type of machine development. In addition, the project results will be helpful in technological development for the production of free-form concrete panels of uniform quality, whose shape accuracy is not influenced by the skills and competence of the workers producing the panels.
Sunkuk Kim; Seunghyun Son; Donghoon Lee. Development of Sustainable Production Technology of Free-Form Concrete Panels Using a Multi-Point Press CNC Machine. Sustainability 2021, 13, 1990 .
AMA StyleSunkuk Kim, Seunghyun Son, Donghoon Lee. Development of Sustainable Production Technology of Free-Form Concrete Panels Using a Multi-Point Press CNC Machine. Sustainability. 2021; 13 (4):1990.
Chicago/Turabian StyleSunkuk Kim; Seunghyun Son; Donghoon Lee. 2021. "Development of Sustainable Production Technology of Free-Form Concrete Panels Using a Multi-Point Press CNC Machine." Sustainability 13, no. 4: 1990.
For heavily loaded long-span (HLS) logistics buildings, embodied CO2 (ECO2) of a structural frame accounts for more than 80% of the CO2 emissions of the entire building. To realize a sustainable structure from the CO2 perspective, an innovative construction method that reduces ECO2 of a structural frame is required. Through studies conducted over several years, we have developed a SMART (Sustainable, Measurable, Attainable, Reliable, and Timely) frame that is a steel connected composite precast concrete (CPC) frame that significantly reduces not only construction time and cost but also ECO2. If a SMART frame is applied to HLS logistics buildings, ECO2 reduction effects are expected to be substantial. To prove this, this study aims to analyze ECO2 reduction effects of the CPC frame for HLS logistics buildings. An HLS logistics building constructed with the existing precast concrete (PC) frame was selected as a case project. Thereafter, the typical PC girder was redesigned using the SMART frame; then, analysis was conducted on the quantity take-off of resources, such as form, rebar, steel, and concrete, as well as on ECO2 and production cost. As a result of the analysis, in the case of a single typical girder of the SMART frame, 730 kg-ECO2, which accounts for 9.52% of the CO2 emissions, was reduced compared to that of the existing PC frame. If only the typical girders of the case project are applied, a relatively larger quantity of 465 ton-ECO2 will be reduced. The results of this study will contribute in securing structural stability, as well as achieving a sustainable structure that leads to an unprecedented reduction of ECO2.
Seunghyun Son; Kwangheon Park; Heni Fitriani; Sunkuk Kim. Embodied CO2 Reduction Effects of Composite Precast Concrete Frame for Heavily Loaded Long-Span Logistics Buildings. Sustainability 2021, 13, 1060 .
AMA StyleSeunghyun Son, Kwangheon Park, Heni Fitriani, Sunkuk Kim. Embodied CO2 Reduction Effects of Composite Precast Concrete Frame for Heavily Loaded Long-Span Logistics Buildings. Sustainability. 2021; 13 (3):1060.
Chicago/Turabian StyleSeunghyun Son; Kwangheon Park; Heni Fitriani; Sunkuk Kim. 2021. "Embodied CO2 Reduction Effects of Composite Precast Concrete Frame for Heavily Loaded Long-Span Logistics Buildings." Sustainability 13, no. 3: 1060.
Free-form design may enhance the architectural value of buildings in terms of aesthetic and symbolic effects. However, it is difficult to reuse the mold of free-form concrete segments, so they are manufactured for single use. Manufacturing these molds is a time-consuming process that requires a lot of manpower. To solve these problems, there have been numerous studies on the use of phase change materials (PCMs) to make the molds. PCM molds represent a new technique of producing free-form panels using a computerized numeric control (CNC) machine that employs low-cost material to produce free-form concrete panels. However, PCM molds require a substantial amount of time and energy during fabrication because repeated heating and cooling cycles are required during panel production, and this process increases the CO2 emissions. Thus, the purposes of this study were to develop composite molds using aluminum powder to improve PCM mold performance and to conduct experiments to quantify the reduction of energy use and CO2 emissions. As a result of cooling experiments, it was found that the aluminum powder mold had an energy reduction effect of 14.3% against the PCM mold that had been produced only with paraffin wax, and CO2 reduction effect of more than 50% against the conventional mold.
Donghoon Lee; Sunkuk Kim. Energy and CO2 Reduction of Aluminum Powder Molds for Producing Free-Form Concrete Panels. Sustainability 2020, 12, 9613 .
AMA StyleDonghoon Lee, Sunkuk Kim. Energy and CO2 Reduction of Aluminum Powder Molds for Producing Free-Form Concrete Panels. Sustainability. 2020; 12 (22):9613.
Chicago/Turabian StyleDonghoon Lee; Sunkuk Kim. 2020. "Energy and CO2 Reduction of Aluminum Powder Molds for Producing Free-Form Concrete Panels." Sustainability 12, no. 22: 9613.
In high-rise residential buildings (HRBs), elevators run at a high speed, which causes problems such as change of atmospheric pressure, noise, and vibration. Elevator noise and vibration (ENV) of HRBs causes both mental anxiety and a consistently negative effect for promoting a comfortable residential area. Therefore, a solution for alleviating the ENV of HRBs is essential. To date, studies related to ENV have been mostly conducted in the approach of mechanical and electric aspects. There have been few cases conducted from the perspective of construction management (CM), which integrates design and construction. Therefore, the aim of this study is to propose CM solutions to mitigate the ENV of HRB. For this study, the CM solution is presented after identifying the ENV problems of HRBs through documented research and case measurement. By measuring the noise of HRB that the solution was applied to, the noise level, especially in a range of >125 Hz, was extensively reduced. The result of this study will be used as sustainable guidelines that alleviate ENV problems in the process of design and construction of HRB elevators. It is expected that studies for improving ENV problems that occur in high-rise elevators will increase on the basis of the results of this study.
Yangki Oh; Minwoo Kang; Kwangchae Lee; Sunkuk Kim. Construction Management Solutions to Mitigate Elevator Noise and Vibration of High-Rise Residential Buildings. Sustainability 2020, 12, 8924 .
AMA StyleYangki Oh, Minwoo Kang, Kwangchae Lee, Sunkuk Kim. Construction Management Solutions to Mitigate Elevator Noise and Vibration of High-Rise Residential Buildings. Sustainability. 2020; 12 (21):8924.
Chicago/Turabian StyleYangki Oh; Minwoo Kang; Kwangchae Lee; Sunkuk Kim. 2020. "Construction Management Solutions to Mitigate Elevator Noise and Vibration of High-Rise Residential Buildings." Sustainability 12, no. 21: 8924.
Joseph J. Kim; James A. Miller; Sunkuk Kim. Cost Impacts of Change Orders due to Unforeseen Existing Conditions in Building Renovation Projects. Journal of Construction Engineering and Management 2020, 146, 04020094 .
AMA StyleJoseph J. Kim, James A. Miller, Sunkuk Kim. Cost Impacts of Change Orders due to Unforeseen Existing Conditions in Building Renovation Projects. Journal of Construction Engineering and Management. 2020; 146 (8):04020094.
Chicago/Turabian StyleJoseph J. Kim; James A. Miller; Sunkuk Kim. 2020. "Cost Impacts of Change Orders due to Unforeseen Existing Conditions in Building Renovation Projects." Journal of Construction Engineering and Management 146, no. 8: 04020094.
Reinforcing bars (rebar), which have the most embodied carbon dioxide (CO2) per unit weight in built environments, generate a significant amount of cutting waste during the construction phase. Excessive cutting waste not only increases the construction cost but also contributes to a significant amount of CO2 emissions. The objective of this paper is to propose a special-length-priority cutting waste minimization (CWM) algorithm for rebar, for sustainable construction. In the proposed algorithms, the minimization method by special and stock lengths was applied. The minimization by special length was performed first, and then the combination by stock length was performed for the remaining rebar. As a result of verifying the proposed algorithms through a case application, it was confirmed that the quantity of rebar was reduced by 6.04% compared with the actual quantity used. In the case building, a CO2 emissions reduction of 406.6 ton-CO2 and a cost savings of USD 119,306 were confirmed. When the results of this paper are applied in practice, they will be used as a tool for sustainable construction management as well as for construction cost reduction.
Dongho Lee; Seunghyun Son; Doyeong Kim; Sunkuk Kim. Special-Length-Priority Algorithm to Minimize Reinforcing Bar-Cutting Waste for Sustainable Construction. Sustainability 2020, 12, 5950 .
AMA StyleDongho Lee, Seunghyun Son, Doyeong Kim, Sunkuk Kim. Special-Length-Priority Algorithm to Minimize Reinforcing Bar-Cutting Waste for Sustainable Construction. Sustainability. 2020; 12 (15):5950.
Chicago/Turabian StyleDongho Lee; Seunghyun Son; Doyeong Kim; Sunkuk Kim. 2020. "Special-Length-Priority Algorithm to Minimize Reinforcing Bar-Cutting Waste for Sustainable Construction." Sustainability 12, no. 15: 5950.
For the practical application of free-form concrete panel (FCP) production using 3D plastering technology, the in-plant production must be performed to meet the tight schedule of FCP installation on site. To this end, critical activities and their working times that affect FCP production time must be accurately analyzed. The objective of this paper is to develop the algorithms for predicting production time of FCPs using 3D plastering technology. This study was performed by analyzing the FCP production process and core activities such as free-form shaping and 3D plastering works, and then using the results to develop a generalized FCP production time predicting algorithm. Through the case application of the algorithm, the relationship between the production time and the number of machines required was derived by simulation. The results of this study help to solve the time and cost conflicts that may occur in the production of FCPs. The proposed algorithm should be developed as a computerized program for simulating the number of machines required according to the FCP production schedule for practical use.
Seunghyun Son; Doyeong Kim; Kiyoung Son; Sunkuk Kim. Predicting production time of free-form concrete panels using 3D plastering technology. Automation in Construction 2020, 119, 103327 .
AMA StyleSeunghyun Son, Doyeong Kim, Kiyoung Son, Sunkuk Kim. Predicting production time of free-form concrete panels using 3D plastering technology. Automation in Construction. 2020; 119 ():103327.
Chicago/Turabian StyleSeunghyun Son; Doyeong Kim; Kiyoung Son; Sunkuk Kim. 2020. "Predicting production time of free-form concrete panels using 3D plastering technology." Automation in Construction 119, no. : 103327.
Purpose. the purpose of this study is to analyze the correlation between safety climate and productivity for actual construction projects. The safety climate of the case projects was analyzed with a questionnaire using NOSACQ-50 for the participants of the projects, and the resources used for the main work were used to analyze productivity. Methods. Many researchers have concluded that if the safety climate in a construction business improves, the rate of human accidents decreases. A decrease in accidents or injuries means that the quality of labor is improved; productivity can be expected to increase as a result. However, some site engineers argue that there is a dilemma since management costs increase when the safety climate is improved. If quantitative analysis of the correlation between safety climate and construction productivity can be performed, the results may show that additional costs to improve the safety climate are offset by productivity gains. Conclusions. As a result of regression analysis, we concluded that there is a significant relationship between safety climate and productivity. In the future, our findings can be used as a reference for developing a construction productivity prediction model as influenced by the safety climate.
Jeong Sun Lee; Seunghyun Son; Sunkuk Kim; Kiyoung Son. Correlation analysis of safety climate and construction productivity in South Korea. International Journal of Occupational Safety and Ergonomics 2020, 27, 589 -596.
AMA StyleJeong Sun Lee, Seunghyun Son, Sunkuk Kim, Kiyoung Son. Correlation analysis of safety climate and construction productivity in South Korea. International Journal of Occupational Safety and Ergonomics. 2020; 27 (2):589-596.
Chicago/Turabian StyleJeong Sun Lee; Seunghyun Son; Sunkuk Kim; Kiyoung Son. 2020. "Correlation analysis of safety climate and construction productivity in South Korea." International Journal of Occupational Safety and Ergonomics 27, no. 2: 589-596.
Jeeyoung Lim; Sunkuk Kim; Joseph J. Kim. Dynamic Simulation Model for Estimating In-situ Production Quantity of PC Members. International Journal of Civil Engineering 2020, 18, 935 -950.
AMA StyleJeeyoung Lim, Sunkuk Kim, Joseph J. Kim. Dynamic Simulation Model for Estimating In-situ Production Quantity of PC Members. International Journal of Civil Engineering. 2020; 18 (8):935-950.
Chicago/Turabian StyleJeeyoung Lim; Sunkuk Kim; Joseph J. Kim. 2020. "Dynamic Simulation Model for Estimating In-situ Production Quantity of PC Members." International Journal of Civil Engineering 18, no. 8: 935-950.
The precast concrete (PC) method is preferable in construction activities for its short construction time, guaranteed quality, and cost-effectiveness. Most researchers and engineers believe that these benefits are maximized if the PC components are produced at manufacturing plants. However, under similar production conditions, the in-situ production of PC components can save production costs while providing quality equal to or better than in-plant production. Several studies have described the benefits for the cost reduction effects of in-situ production. However, the verification by using case studies was not conducted. The purpose of this study is to analyze the cost reduction effects of the in-situ production of PC elements. For this study, a case project was selected to establish an in-situ production plan and PC columns were produced on site. Then, the cost reduction effects were analyzed using the actual data of the case project. The results of this study will be used as a core for the development of algorithms for in-situ production of PC components.
Jeeyoung Lim; Kwangheon Park; Seunghyun Son; Sunkuk Kim. Cost reduction effects of in-situ PC production for heavily loaded long-span buildings. Journal of Asian Architecture and Building Engineering 2020, 19, 242 -253.
AMA StyleJeeyoung Lim, Kwangheon Park, Seunghyun Son, Sunkuk Kim. Cost reduction effects of in-situ PC production for heavily loaded long-span buildings. Journal of Asian Architecture and Building Engineering. 2020; 19 (3):242-253.
Chicago/Turabian StyleJeeyoung Lim; Kwangheon Park; Seunghyun Son; Sunkuk Kim. 2020. "Cost reduction effects of in-situ PC production for heavily loaded long-span buildings." Journal of Asian Architecture and Building Engineering 19, no. 3: 242-253.
Precast concrete (PC) construction method is typically preferred due to its reduced construction time, quality assurance, and cost effectiveness. Experimental studies have proven that in-situ production of PC components ensures equivalent or enhanced quality with substantial cost reductions compared to those of in-plant production, under the same production conditions. The construction method may also be environment friendly due to its relatively low CO2 emissions. However, it is necessary to examine the degree of this method’s effectiveness via experimental studies. The purpose of this study is to evaluate the CO2 emission reduction effect of in-situ production of PC components. Using a case project, the CO2 emission is estimated and compared for the operations between in-situ and in-plant production. The CO2 emission of in-situ produced PC components reduced by 14.3% or more when compared to the in-plant production. This shows that in-situ production of PC components can greatly reduce CO2 emissions, while maintaining its cost effectiveness and quality assurance. Furthermore, this study contributes in changing the negative perception of in-situ production of PC components and in the development of algorithms that scientifically analyze the CO2 emission reduction effect of in-situ production of PC components.
Jeeyoung Lim; Sunkuk Kim. Evaluation of CO2 emission reduction effect using in-situ production of precast concrete components. Journal of Asian Architecture and Building Engineering 2020, 19, 176 -186.
AMA StyleJeeyoung Lim, Sunkuk Kim. Evaluation of CO2 emission reduction effect using in-situ production of precast concrete components. Journal of Asian Architecture and Building Engineering. 2020; 19 (2):176-186.
Chicago/Turabian StyleJeeyoung Lim; Sunkuk Kim. 2020. "Evaluation of CO2 emission reduction effect using in-situ production of precast concrete components." Journal of Asian Architecture and Building Engineering 19, no. 2: 176-186.
The characteristics of large logistics buildings are their long spans and the ability to take heavy loads. Usually, PC components are used for their frames to ensure quick construction. However, the erection of most pin jointed PC structures increases the time and the cost incurred for ensuring structural stability and construction safety. To solve this problem, “smart” frames have been developed, which have tapered steel joints at both ends of the PC components. A smart frame with the moment frame concept not only assures structural stability and construction safety, but it also simplifies and quickens the erection because of its tapered joint detail. The purpose of this study is to compare the erection time and cost effects of the steel connected PC components for heavily loaded long-span logistics buildings with the existing PC frames. For this study, we selected a logistics building constructed with PC components and redesigned it as the smart frame, and the erection simulations were performed. We analyzed the time reduction effects of the smart frame. Our results confirmed that the use of the smart frame reduced the erection time and cost practically. Our investigations will help develop the erection simulation algorithms for smart frames.
Ho-Haeng Lee; Ki-Ho Kim; Seunghyun Son; Kwangheon Park; Sunkuk Kim. TIME REDUCTION EFFECTS OF STEEL CONNECTED PRECAST CONCRETE COMPONENTS FOR HEAVILY LOADED LONG-SPAN BUILDINGS. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 2020, 26, 160 -174.
AMA StyleHo-Haeng Lee, Ki-Ho Kim, Seunghyun Son, Kwangheon Park, Sunkuk Kim. TIME REDUCTION EFFECTS OF STEEL CONNECTED PRECAST CONCRETE COMPONENTS FOR HEAVILY LOADED LONG-SPAN BUILDINGS. JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT. 2020; 26 (2):160-174.
Chicago/Turabian StyleHo-Haeng Lee; Ki-Ho Kim; Seunghyun Son; Kwangheon Park; Sunkuk Kim. 2020. "TIME REDUCTION EFFECTS OF STEEL CONNECTED PRECAST CONCRETE COMPONENTS FOR HEAVILY LOADED LONG-SPAN BUILDINGS." JOURNAL OF CIVIL ENGINEERING AND MANAGEMENT 26, no. 2: 160-174.
A hybrid composite pre-cast concrete column called SMART column has been developed to increase the productivity of the tilt-up construction method. SMART column, consisting of three pre-cast concrete members and steel joints connecting them, covers three stories per unit. The joints where concrete is not poured during production consist of connection steel and rebar installed through three pre-cast concrete members, and are weak areas for possible failure due to stress concentration. Although SMART column is designed safely through sufficient structural review, failure can occur during the tilt-up process adversely affecting cost and time. This paper presents the field experiment results on SMART column for its safe erection by measuring the embedded rebar strains using five different lifting procedures during the tilt-up process. Based on experiment investigations, all five lifting procedures exhibited small strain behaviours in reinforcing bars, indicating no significant bending was observed during the lifting procedures, which proved the safe erection of a SMART column.
Shraddha Palikhe; Sunkuk Kim; Joseph J. Kim. Evaluating precast concrete column tilt-up methods to examine erection safety. Structures Buildings 2020, 173, 63 -75.
AMA StyleShraddha Palikhe, Sunkuk Kim, Joseph J. Kim. Evaluating precast concrete column tilt-up methods to examine erection safety. Structures Buildings. 2020; 173 (1):63-75.
Chicago/Turabian StyleShraddha Palikhe; Sunkuk Kim; Joseph J. Kim. 2020. "Evaluating precast concrete column tilt-up methods to examine erection safety." Structures Buildings 173, no. 1: 63-75.
Construction project participants seek to accurately determine construction costs as soon as a design is completed. However, it may take a minimum of several weeks for cost estimation after the structural design and drawings are completed. Manual quantity surveying is time-consuming and requires significant experience and time. Even if computerized software is used, it is time-consuming to enter structural design information into the estimation software. In addition, the estimated quantity may result in inaccurate cost owing to drawing errors or quantity surveyors’ mistake, and it is not the exact quantity to be put into actual construction, which can cause numerous problems in the construction phase. If the information can be automatically received for estimation, the exact quantity for construction can be estimated without omission or errors. To estimate the exact quantity after structural analysis and design of building projects, this study proposes an automatic estimation system of building frames with integrated structural design information (AutoES). Using the algorithms of AutoES, the task of estimation can be accomplished with an exact bill of quantities including a bar bending schedule within 1 week.
Doyeong Kim; Chaeyeon Lim; Yue Liu; Sunkuk Kim. Automatic Estimation System of Building Frames with Integrated Structural Design Information (AutoES). Iranian Journal of Science and Technology, Transactions of Civil Engineering 2019, 44, 1 -13.
AMA StyleDoyeong Kim, Chaeyeon Lim, Yue Liu, Sunkuk Kim. Automatic Estimation System of Building Frames with Integrated Structural Design Information (AutoES). Iranian Journal of Science and Technology, Transactions of Civil Engineering. 2019; 44 (4):1-13.
Chicago/Turabian StyleDoyeong Kim; Chaeyeon Lim; Yue Liu; Sunkuk Kim. 2019. "Automatic Estimation System of Building Frames with Integrated Structural Design Information (AutoES)." Iranian Journal of Science and Technology, Transactions of Civil Engineering 44, no. 4: 1-13.