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Earthquakes may damage buildings, but they also induce uplift and overturn the content of a building that, in the case of museums, can lead to the irreparable loss of art objects. In many cases, these objects, subjected to seismic actions, can be modeled considering the nonlinear dynamics of rigid blocks. This paper is focused on the seismic behavior of statues, which generally present a quite complex geometry, and are mostly characterized by a pronounced unsymmetrical response under seismic excitations. The proposed study, involving both numerical analyses and experimental tests, is applied to the masterpiece Venere Landolina of the Paolo Orsi museum (Syracuse, Italy). Analytical simulations are conducted according to a novel rigid block model accounting for asymmetric behavior and contact impairments. The experimental campaign is conducted on a scaled physical prototype, built according to a highly detailed digital model obtained by 3D survey. The numerical and experimental campaign is conducted with reference to compatible seismic ground motions, conveniently scaled to cope with scale effects. The results are finally correlated and discussed, showing the potential of the proposed approach for modeling artwork in seismic conditions and the reliability of a combined experimental and numerical strategy to assess the seismic safety of statues.
G. Cocuzza Avellino; F. Cannizzaro; A. Di Martino; R. Valenti; E. Paternò; I. Caliò; N. Impollonia. Numerical and Experimental Response of Free-Standing Art Objects Subjected to Ground Motion. International Journal of Architectural Heritage 2021, 1 -16.
AMA StyleG. Cocuzza Avellino, F. Cannizzaro, A. Di Martino, R. Valenti, E. Paternò, I. Caliò, N. Impollonia. Numerical and Experimental Response of Free-Standing Art Objects Subjected to Ground Motion. International Journal of Architectural Heritage. 2021; ():1-16.
Chicago/Turabian StyleG. Cocuzza Avellino; F. Cannizzaro; A. Di Martino; R. Valenti; E. Paternò; I. Caliò; N. Impollonia. 2021. "Numerical and Experimental Response of Free-Standing Art Objects Subjected to Ground Motion." International Journal of Architectural Heritage , no. : 1-16.
The influence of damage in beam-like structures is a problem widely analysed in the literature in view of its importance towards the assessment of the residual carrying capacity and the evaluation of the inevitable changes of the dynamic properties. Usually, the dynamic properties and the forced vibrations of structures, cannot be explicitly inferred, particularly in the presence of damage, since the computation of the roots of a highly nonlinear determinantal equation is preliminarily required. Rather, explicit formulations are usually preferred for their ease to use and the possibility to perform parametric analyses, very useful in the case of uncertain parameters, and also to address inverse problems. In this paper, aiming at proposing an explicit formulation of the dynamic response of cracked beams, a model which makes use of the distribution theory and does not require the enforcement of continuity conditions at the cracked sections is employed. Approximated explicit expressions of the main modal parameters related to crack severities are here provided and the reliability of the proposed formulas are verified with reference solutions. The approximated modal parameters can then be used to obtain explicitly the forced vibrations of cracked beams. The proposed methodology is here adopted to address both direct and inverse problems. First, the variability of the dynamic response of cracked beams due to the presence of cracks with uncertain, but bounded, depths is investigated; then, upper and lower bounds of the response are evaluated by making use of both time and frequency domain analyses. In addition, the possibility to adopt the same explicit approach for the identification of damage intensities considering frequency measurements is explored.
F. Cannizzaro; N. Impollonia; S. Caddemi; I. Caliò. Explicit dynamic response of damaged beams with application to uncertain and identification problems. Journal of Sound and Vibration 2020, 487, 115608 .
AMA StyleF. Cannizzaro, N. Impollonia, S. Caddemi, I. Caliò. Explicit dynamic response of damaged beams with application to uncertain and identification problems. Journal of Sound and Vibration. 2020; 487 ():115608.
Chicago/Turabian StyleF. Cannizzaro; N. Impollonia; S. Caddemi; I. Caliò. 2020. "Explicit dynamic response of damaged beams with application to uncertain and identification problems." Journal of Sound and Vibration 487, no. : 115608.
A. Greco; A. Pluchino; F. Cannizzaro. An improved ant colony optimization algorithm and its applications to limit analysis of frame structures. Engineering Optimization 2019, 51, 1867 -1883.
AMA StyleA. Greco, A. Pluchino, F. Cannizzaro. An improved ant colony optimization algorithm and its applications to limit analysis of frame structures. Engineering Optimization. 2019; 51 (11):1867-1883.
Chicago/Turabian StyleA. Greco; A. Pluchino; F. Cannizzaro. 2019. "An improved ant colony optimization algorithm and its applications to limit analysis of frame structures." Engineering Optimization 51, no. 11: 1867-1883.
This paper studies the inverse problem related to the identification of the flexural stiffness of an Euler Bernoulli beam to reconstruct its profile starting from available response data. The proposed identification procedure makes use of energy measurements and is based on the application of a closed form solution for the static displacements of multi-stepped beams. This solution allows to easily calculate the energy related to beams modeled with arbitrary multi-step shapes subjected to a transversal roving force, and to compare it with the correspondent data obtained through direct measurements on real beams. The optimal solution which minimizes the difference between the measured and calculated data is then sought by means of genetic algorithms. In the paper, several different stepped beams are investigated, showing that the proposed procedure allows, in many cases, to identify the exact beam profile. However, it is shown that, in some other cases, different multi-step profiles may correspond to very similar static responses, and, therefore, to comparable minima in the optimization problem, thus complicating the profile identification problem.
A. Greco; A. Pluchino; S. Caddemi; I. Caliò; F. Cannizzaro. On profile reconstruction of Euler–Bernoulli beams by means of an energy based genetic algorithm. Engineering with Computers 2019, 36, 239 -250.
AMA StyleA. Greco, A. Pluchino, S. Caddemi, I. Caliò, F. Cannizzaro. On profile reconstruction of Euler–Bernoulli beams by means of an energy based genetic algorithm. Engineering with Computers. 2019; 36 (1):239-250.
Chicago/Turabian StyleA. Greco; A. Pluchino; S. Caddemi; I. Caliò; F. Cannizzaro. 2019. "On profile reconstruction of Euler–Bernoulli beams by means of an energy based genetic algorithm." Engineering with Computers 36, no. 1: 239-250.
Masonry multi-span arch bridges are historical structures still playing a key role in many transportation networks of numerous countries. Most of these bridges are several decades old and have been subjected to continuous dynamic loadings, due to the vehicular traffic, and in many cases their maintenance required structural modifications. The currently adopted health monitoring strategies are based on in situ inspections as well as structural assessments based on numerical models characterised by different levels of reliability according to the required purpose. Simplified approaches are generally adopted for fast structural evaluation, on the other hand more rigorous approaches are fundamental for a reliable structural assessment of these particular structures, often characterized by very complex geometrical layouts and structural alterations not always sufficiently documented. This paper presents an original Discrete Macro-Element Method (DMEM) that allows a reliable simulation of the linear and nonlinear response of masonry structures and masonry bridges characterised by a lower computational burden, compared to classical nonlinear FEM analyses, although maintaining a good accuracy. The method is applied to a real masonry bridges and the results are compared with those obtained from a more sophisticated three- dimensional nonlinear FEM model both in linear and nonlinear context.
Salvatore Caddemi; Ivo Caliò; Francesco Cannizzaro; Domenico D'Urso; Bartolomeo Pantò; Davide Rapicavoli; Giuseppe Occhipinti. 3D Discrete Macro-Modelling Approach for Masonry Arch Bridges. IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management 2019, 1825 -1835.
AMA StyleSalvatore Caddemi, Ivo Caliò, Francesco Cannizzaro, Domenico D'Urso, Bartolomeo Pantò, Davide Rapicavoli, Giuseppe Occhipinti. 3D Discrete Macro-Modelling Approach for Masonry Arch Bridges. IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management. 2019; ():1825-1835.
Chicago/Turabian StyleSalvatore Caddemi; Ivo Caliò; Francesco Cannizzaro; Domenico D'Urso; Bartolomeo Pantò; Davide Rapicavoli; Giuseppe Occhipinti. 2019. "3D Discrete Macro-Modelling Approach for Masonry Arch Bridges." IABSE Symposium, Guimarães 2019: Towards a Resilient Built Environment Risk and Asset Management , no. : 1825-1835.
UnReinforced Masonry (URM) structures experience severe damage due to in-plane and out-of-plane mechanisms when subjected to seismic actions. The assessment of the seismic vulnerability of URM generally requires complex analytical procedures consisting of the application of sophisticated numerical models. However, these models may request a high computational effort or may present an over-simplified scheme, mainly when the out-of-plane mechanisms are neglected. In this sense, a 3-dimensional macro-element model is here used for a preliminary assessment of the seismic vulnerability of a URM prototype characterized by an out-of-plane collapse mechanism. In this paper, the seismic vulnerability of this type of constructions is investigated by means of fragility functions in accordance with specific damage states and a given seismic input. The structural safety assessment was conducted by means of time history analyses with a limited computational effort. In addition, the evaluation of the limit states is here performed by means of an alternative approach named as Capacity Dominium based on the application of nonlinear static analyses.
César Chácara; Paulo B. Lourenço; Francesco Cannizzaro; Bartolomeo Pantò; Ivo Caliò. Assessment of the Seismic Vulnerability of an Unreinforced Masonry Structure Based on Discrete-Macro Dynamic Analyses. High Performance Fiber Reinforced Cement Composites 6 2019, 1210 -1218.
AMA StyleCésar Chácara, Paulo B. Lourenço, Francesco Cannizzaro, Bartolomeo Pantò, Ivo Caliò. Assessment of the Seismic Vulnerability of an Unreinforced Masonry Structure Based on Discrete-Macro Dynamic Analyses. High Performance Fiber Reinforced Cement Composites 6. 2019; ():1210-1218.
Chicago/Turabian StyleCésar Chácara; Paulo B. Lourenço; Francesco Cannizzaro; Bartolomeo Pantò; Ivo Caliò. 2019. "Assessment of the Seismic Vulnerability of an Unreinforced Masonry Structure Based on Discrete-Macro Dynamic Analyses." High Performance Fiber Reinforced Cement Composites 6 , no. : 1210-1218.
The structural response of masonry arches is strongly dominated by the arch geometry, the stone block dimensions and the interaction with backfill material or surrounding walls. Due to their intrinsic discontinuous nature, the nonlinear structural response of these key historical structures can be efficiently modelled in the context of discrete element approaches. Smeared crack finite elements models, based on the assumption of homogenised media and spread plasticity, fail to rigorously predict the actual collapse behaviour of such structures, that are generally governed by rocking and sliding mechanisms along mortar joints between stone blocks. In this paper a new Discrete Macro-Element Method (DMEM) for predicting the nonlinear structural behaviour of masonry arches is proposed. The method is based on a macro-element discretization in which each plane element interacts with the adjacent elements through zero-thickness interfaces and whose internal deformability is related to a single degree of freedom only. Both experimental and numerical validations show the capability of the proposed approach to be applied for the prediction of the non-linear response of masonry arch structures under different loading conditions.
Francesco Cannizzaro; B. Pantò; S. Caddemi; I. Caliò. A Discrete Macro-Element Method (DMEM) for the nonlinear structural assessment of masonry arches. Engineering Structures 2018, 168, 243 -256.
AMA StyleFrancesco Cannizzaro, B. Pantò, S. Caddemi, I. Caliò. A Discrete Macro-Element Method (DMEM) for the nonlinear structural assessment of masonry arches. Engineering Structures. 2018; 168 ():243-256.
Chicago/Turabian StyleFrancesco Cannizzaro; B. Pantò; S. Caddemi; I. Caliò. 2018. "A Discrete Macro-Element Method (DMEM) for the nonlinear structural assessment of masonry arches." Engineering Structures 168, no. : 243-256.
The seismic performance of unreinforced masonry structures is strongly associated with the interaction between in‐plane and out‐of‐plane mechanisms. The seismic response of these structures has been thoroughly investigated by means of experimental testing, analytical procedures, and computational approaches. Within the framework of the numerical simulations, models based on the finite element method provide a good prediction of the seismic performance of unreinforced masonry structures. However, they usually require a high computational cost and advanced user expertise to define appropriate mechanical properties and to interpret the numerical results. Because of these limitations, simplified models for practical applications have been developed during the last decades. Despite this, a great number of these models focus mostly on the evaluation of the in‐plane response, assuming box (or integral) behavior of the structure. In this paper, a simplified macroelement modeling approach is used to simulate the seismic response of 2 masonry prototypes taking into consideration the combined in‐plane and out‐of‐plane action. The numerical investigations were performed in the static and dynamic fields by using pushover analyses and nonlinear dynamic analyses respectively. The latter is a novel implementation of a model previously developed for static analysis. The results obtained from this study are in good agreement with those provided by a detailed nonlinear continuum FE approach, demonstrating the applicability of this macroelement model with a significant reduction of the computational cost.
César Chácara; Francesco Cannizzaro; Bartolomeo Pantò; Ivo Caliò; Paulo B. Lourenço. Assessment of the dynamic response of unreinforced masonry structures using a macroelement modeling approach. Earthquake Engineering & Structural Dynamics 2018, 1 .
AMA StyleCésar Chácara, Francesco Cannizzaro, Bartolomeo Pantò, Ivo Caliò, Paulo B. Lourenço. Assessment of the dynamic response of unreinforced masonry structures using a macroelement modeling approach. Earthquake Engineering & Structural Dynamics. 2018; ():1.
Chicago/Turabian StyleCésar Chácara; Francesco Cannizzaro; Bartolomeo Pantò; Ivo Caliò; Paulo B. Lourenço. 2018. "Assessment of the dynamic response of unreinforced masonry structures using a macroelement modeling approach." Earthquake Engineering & Structural Dynamics , no. : 1.
Francesco Cannizzaro; J. De Los Rios; S. Caddemi; I. Caliò; S. Ilanko. On the use of a roving body with rotary inertia to locate cracks in beams. Journal of Sound and Vibration 2018, 425, 275 -300.
AMA StyleFrancesco Cannizzaro, J. De Los Rios, S. Caddemi, I. Caliò, S. Ilanko. On the use of a roving body with rotary inertia to locate cracks in beams. Journal of Sound and Vibration. 2018; 425 ():275-300.
Chicago/Turabian StyleFrancesco Cannizzaro; J. De Los Rios; S. Caddemi; I. Caliò; S. Ilanko. 2018. "On the use of a roving body with rotary inertia to locate cracks in beams." Journal of Sound and Vibration 425, no. : 275-300.
In this work, a model of the Euler–Bernoulli beam in presence of multiple‐concentrated open cracks, based on the adoption of a localized flexibility model, is adopted. The closed‐form solution in terms of transversal displacements due to static loads and general boundary condition is exploited to propose an inverse damage identification procedure. The proposed identification procedure does not require any solution algorithm, on the contrary is formulated by means of simple explicit sequential expressions for the crack positions and intensities including the identification of the integration constants. The number of possible detected cracks depends on the couples of adopted sensors. Undamaged beam zones can also be easily detected in relation to the sensor positions. The analytical character of the explicit expressions of the identification procedure makes the inverse formulation applicable to damaged beams included in more complex frame structures. The proposed procedure is applied for the identification of the number, position, and intensity of the cracks along simple straight beams and also to more complex frame structures with the aim of showing its simplicity for engineering applications. In addition, the robustness of the methodology here described is shown through an accurate analysis of the basic assumptions on which the theory relies and by means of a study of the effect of noise on the identification results.
S. Caddemi; I. Caliò; Francesco Cannizzaro; A. Morassi. A procedure for the identification of multiple cracks on beams and frames by static measurements. Structural Control and Health Monitoring 2018, 25, e2194 .
AMA StyleS. Caddemi, I. Caliò, Francesco Cannizzaro, A. Morassi. A procedure for the identification of multiple cracks on beams and frames by static measurements. Structural Control and Health Monitoring. 2018; 25 (8):e2194.
Chicago/Turabian StyleS. Caddemi; I. Caliò; Francesco Cannizzaro; A. Morassi. 2018. "A procedure for the identification of multiple cracks on beams and frames by static measurements." Structural Control and Health Monitoring 25, no. 8: e2194.
A. Greco; D. D'Urso; Francesco Cannizzaro; A. Pluchino. Damage identification on spatial Timoshenko arches by means of genetic algorithms. Mechanical Systems and Signal Processing 2018, 105, 51 -67.
AMA StyleA. Greco, D. D'Urso, Francesco Cannizzaro, A. Pluchino. Damage identification on spatial Timoshenko arches by means of genetic algorithms. Mechanical Systems and Signal Processing. 2018; 105 ():51-67.
Chicago/Turabian StyleA. Greco; D. D'Urso; Francesco Cannizzaro; A. Pluchino. 2018. "Damage identification on spatial Timoshenko arches by means of genetic algorithms." Mechanical Systems and Signal Processing 105, no. : 51-67.
A. Greco; A. Pluchino; F. Cannizzaro; S. Caddemi; I. Caliò. Closed-form solution based genetic algorithm software: Application to multiple cracks detection on beam structures by static tests. Applied Soft Computing 2018, 64, 35 -48.
AMA StyleA. Greco, A. Pluchino, F. Cannizzaro, S. Caddemi, I. Caliò. Closed-form solution based genetic algorithm software: Application to multiple cracks detection on beam structures by static tests. Applied Soft Computing. 2018; 64 ():35-48.
Chicago/Turabian StyleA. Greco; A. Pluchino; F. Cannizzaro; S. Caddemi; I. Caliò. 2018. "Closed-form solution based genetic algorithm software: Application to multiple cracks detection on beam structures by static tests." Applied Soft Computing 64, no. : 35-48.
The plastic load and failure modes of vertically irregular planar frames are studied by means of an original software code developed in the agent-based programming environment NetLogo with a user-friendly interface. The proposed method lies in the limit analysis framework and is based on the generation of elementary collapse mechanisms and on their linear combination aimed at minimizing the collapse load factor. The considered irregularities consist in the absence of an arbitrary column in a regular grid of the frame and require considering additional elementary mechanisms, here presented for the first time, with respect to those associated to the corresponding regular frame. A further novelty of the method is the adoption, in the linear combination of elementary mechanisms, of negative coefficients, which, as better shown in the applicative section, is fundamental to grasp the actual collapse mechanism in irregular frames. The minimization procedure is efficiently performed by means of genetic algorithms, which allow computing both the collapse load factor and the correspondent failure mode with great accuracy and in a very short computing time. Many applications have been performed considering seismic load scenarios. Finally, by means of a parametric study, some general considerations on the weakest configurations of this typology of vertically irregular frames are provided.
A. Greco; F. Cannizzaro; A. Pluchino. Automatic evaluation of plastic collapse conditions for planar frames with vertical irregularities. Engineering with Computers 2018, 35, 57 -73.
AMA StyleA. Greco, F. Cannizzaro, A. Pluchino. Automatic evaluation of plastic collapse conditions for planar frames with vertical irregularities. Engineering with Computers. 2018; 35 (1):57-73.
Chicago/Turabian StyleA. Greco; F. Cannizzaro; A. Pluchino. 2018. "Automatic evaluation of plastic collapse conditions for planar frames with vertical irregularities." Engineering with Computers 35, no. 1: 57-73.
The experience of the recent earthquakes in Italy caused a shocking impact in terms of loss of human life and damage in buildings. In particular, when it comes to ancient constructions, their cultural and historical value overlaps with the economic and social one. Among the historical structures, churches have been the object of several studies which identified the main characteristics of the seismic response and the most probable collapse mechanisms. More rarely, academic studies have been devoted to ancient palaces, since they often exhibit irregular and complicated arrangement of the resisting elements, which makes their response very difficult to predict. In this paper, a palace located in L’Aquila, severely damaged by the seismic event of 2009 is the object of an accurate study. A historical reconstruction of the past strengthening interventions as well as a detailed geometric relief is performed to implement detailed numerical models of the structure. Both global and local models are considered and static nonlinear analyses are performed considering the influence of the input direction on the seismic vulnerability of the building. The damage pattern predicted by the numerical models is compared with that observed after the earthquake. The seismic vulnerability assessments are performed in terms of ultimate peak ground acceleration (PGA) using capacity curves and the Italian code spectrum. The results are compared in terms of ultimate ductility demand evaluated performing nonlinear dynamic analyses considering the actual registered seismic input of L’Aquila earthquake.
Francesco Cannizzaro; Bartolomeo Pantò; Marco Lepidi; Salvatore Caddemi; Ivo Caliò. Multi-Directional Seismic Assessment of Historical Masonry Buildings by Means of Macro-Element Modelling: Application to a Building Damaged during the L’Aquila Earthquake (Italy). Buildings 2017, 7, 106 .
AMA StyleFrancesco Cannizzaro, Bartolomeo Pantò, Marco Lepidi, Salvatore Caddemi, Ivo Caliò. Multi-Directional Seismic Assessment of Historical Masonry Buildings by Means of Macro-Element Modelling: Application to a Building Damaged during the L’Aquila Earthquake (Italy). Buildings. 2017; 7 (4):106.
Chicago/Turabian StyleFrancesco Cannizzaro; Bartolomeo Pantò; Marco Lepidi; Salvatore Caddemi; Ivo Caliò. 2017. "Multi-Directional Seismic Assessment of Historical Masonry Buildings by Means of Macro-Element Modelling: Application to a Building Damaged during the L’Aquila Earthquake (Italy)." Buildings 7, no. 4: 106.
Salvatore Caddemi; Ivo Calio; Francesco Cannizzaro. The dynamic stiffness matrix (DSM) of axially loaded multi-cracked frames. Mechanics Research Communications 2017, 84, 90 -97.
AMA StyleSalvatore Caddemi, Ivo Calio, Francesco Cannizzaro. The dynamic stiffness matrix (DSM) of axially loaded multi-cracked frames. Mechanics Research Communications. 2017; 84 ():90-97.
Chicago/Turabian StyleSalvatore Caddemi; Ivo Calio; Francesco Cannizzaro. 2017. "The dynamic stiffness matrix (DSM) of axially loaded multi-cracked frames." Mechanics Research Communications 84, no. : 90-97.
A reliable numerical evaluation of the nonlinear behaviour of historical masonry structures, before and after a seismic retrofitting, is a fundamental issue in the design of the structural retrofitting. Many strengthening techniques have been introduced aimed at improving the structural performance of existing structures that, if properly designed and applied, provide an effective contribution to the preservation of their cultural value. Among these strategies, the use of fabric-reinforced polymeric (FRP) materials on masonry surface is being widely adopted for practical engineering purposes. The application of strips or 2D grid composite layers is a low invasive and easy to apply retrofitting strategy, that is able to improve both the in-plane and the out of plane behaviour of masonry elements also in the presence of complex geometries thanks to their flexibility. For this reason, these techniques are frequently employed for reinforcing masonry curved elements, such as arches and vaults. In this paper, taking advantage of an existing general framework based on a discrete element approach previously introduced by the authors, a discrete element conceived for modelling the interaction between masonry and FRP reinforcement is applied to different curved masonry vaults typologies. This model, already used for evaluating the nonlinear behaviour of masonry arches, is here employed for the first time to evaluate the effectiveness of FRP reinforcements on double curvature elements. After a theoretical description of the proposed strategy, two applications relative to an arch and a dome, subjected to seismic loads, with different reinforced conditions, are presented. The benefit provided by the application of FRP strips is also compared with that associated to traditional retrofitting techniques. A sensitivity study is performed with respect to the structure scale factor.
Bartolomeo Pantò; Francesco Cannizzaro; Salvatore Caddemi; Ivo Caliò; César Chácara; Paulo B. Lourenço. Nonlinear Modelling of Curved Masonry Structures after Seismic Retrofit through FRP Reinforcing. Buildings 2017, 7, 79 .
AMA StyleBartolomeo Pantò, Francesco Cannizzaro, Salvatore Caddemi, Ivo Caliò, César Chácara, Paulo B. Lourenço. Nonlinear Modelling of Curved Masonry Structures after Seismic Retrofit through FRP Reinforcing. Buildings. 2017; 7 (4):79.
Chicago/Turabian StyleBartolomeo Pantò; Francesco Cannizzaro; Salvatore Caddemi; Ivo Caliò; César Chácara; Paulo B. Lourenço. 2017. "Nonlinear Modelling of Curved Masonry Structures after Seismic Retrofit through FRP Reinforcing." Buildings 7, no. 4: 79.
F. Cannizzaro; A. Greco; S. Caddemi; I. Caliò. Closed form solutions of a multi-cracked circular arch under static loads. International Journal of Solids and Structures 2017, 121, 191 -200.
AMA StyleF. Cannizzaro, A. Greco, S. Caddemi, I. Caliò. Closed form solutions of a multi-cracked circular arch under static loads. International Journal of Solids and Structures. 2017; 121 ():191-200.
Chicago/Turabian StyleF. Cannizzaro; A. Greco; S. Caddemi; I. Caliò. 2017. "Closed form solutions of a multi-cracked circular arch under static loads." International Journal of Solids and Structures 121, no. : 191-200.
An accurate evaluation of the nonlinear behaviour of masonry structural elements in existing buildings still represents a complex issue that rigorously requires nonlinear finite element strategies difficult to apply to real large structures. Nevertheless, for the static and seismic assessment of existing structures, involving the contribution of masonry materials, engineers need reliable and efficient numerical tools, whose complexity and computational demand should be suitable for practical purposes. For these reasons the formulation and the validation of simplified numerical strategies represents a very important issue in masonry computational research. In this paper an innovative macro-element approach, developed by the authors in the last decade, is presented. The proposed macro-element formulation is based on different, plane and spatial, macro-elements for the simulation of both the in-plane and out-of-plane behaviour of masonry structures also in presence of masonry elements with curved geometry. The mechanical response of the adopted macro-element is governed by nonlinear zero-thickness interfaces, whose calibration follows a straightforward fibre discretization, and the nonlinear internal shear deformability is ruled by equivalence with a corresponding geometrically consistent homogenized medium. The approach can be considered as ‘parsimonious’ since the kinematics of the adopted elements is controlled by very few degrees of freedom, if compared to a corresponding discretization performed by using nonlinear FEM strategies. This innovative discrete-element strategy has been implemented in two user-oriented software codes 3DMacro and HiStrA (Historical Structures Analysis), which simplifies the modelling of buildings and historical structures by means of several wizard generation tools and input/output facilities. The proposed approach, that represents a powerful tool for the structural assessment of structures in which the masonry plays a key role, is here validated against experimental results involving typical masonry monumental sub-structural elements and numerical results involving real-scale structures.
Salvatore Caddemi; Ivo Caliò; Francesco Cannizzaro; Bartolomeo Pantò. New Frontiers on Seismic Modeling of Masonry Structures. Frontiers in Built Environment 2017, 3, 1 .
AMA StyleSalvatore Caddemi, Ivo Caliò, Francesco Cannizzaro, Bartolomeo Pantò. New Frontiers on Seismic Modeling of Masonry Structures. Frontiers in Built Environment. 2017; 3 ():1.
Chicago/Turabian StyleSalvatore Caddemi; Ivo Caliò; Francesco Cannizzaro; Bartolomeo Pantò. 2017. "New Frontiers on Seismic Modeling of Masonry Structures." Frontiers in Built Environment 3, no. : 1.
A. Greco; F. Cannizzaro; A. Pluchino. Seismic collapse prediction of frame structures by means of genetic algorithms. Engineering Structures 2017, 143, 152 -168.
AMA StyleA. Greco, F. Cannizzaro, A. Pluchino. Seismic collapse prediction of frame structures by means of genetic algorithms. Engineering Structures. 2017; 143 ():152-168.
Chicago/Turabian StyleA. Greco; F. Cannizzaro; A. Pluchino. 2017. "Seismic collapse prediction of frame structures by means of genetic algorithms." Engineering Structures 143, no. : 152-168.
Salvatore Caddemi; Ivo Caliò; Francesco Cannizzaro; Paulo Lourenco; Bartolomeo Pantò. FRP-REINFORCED MASONRY STRUCTURES: NUMERICAL MODELING BY MEANS OF A NEW DISCRETE ELEMENT APPROACH. Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015) 2017, 1 .
AMA StyleSalvatore Caddemi, Ivo Caliò, Francesco Cannizzaro, Paulo Lourenco, Bartolomeo Pantò. FRP-REINFORCED MASONRY STRUCTURES: NUMERICAL MODELING BY MEANS OF A NEW DISCRETE ELEMENT APPROACH. Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015). 2017; ():1.
Chicago/Turabian StyleSalvatore Caddemi; Ivo Caliò; Francesco Cannizzaro; Paulo Lourenco; Bartolomeo Pantò. 2017. "FRP-REINFORCED MASONRY STRUCTURES: NUMERICAL MODELING BY MEANS OF A NEW DISCRETE ELEMENT APPROACH." Proceedings of the 6th International Conference on Computational Methods in Structural Dynamics and Earthquake Engineering (COMPDYN 2015) , no. : 1.