A digital tool based on Genetic Algorithms and Limit Analysis for the seismic assessment of historic masonry buildings

Turco, Chiara; Funari, ‪Marco Francesco; Spadea, Saverio; Ciantia, Matteo Oryem; Lourénço, Paulo B.

doi:10.1016/j.prostr.2020.10.124

Cited by 7 publications

(5 citation statements)

References 22 publications

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“…The optimization problem finds the configuration for the critical failure mechanism and under a low processing time (few seconds). The kinematic problem used herein has theoretical background on the works of Turco, et al (2020);.…”

Section: Upper-bound Limit Analysismentioning

confidence: 99%

A Concurrent Micro/Macro Fe-Model Optimized With a Limit Analysis Tool for the Assessment of Dry-Joint Masonry Structures

Funari

Silva

Savalle

et al. 2022

Int J Mult Comp Eng

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A two-step strategy for the mechanical analysis of unreinforced masonry (URM) structures, either subjected to in-and out-of-plane loading, is presented. At a first step, a semi-automatic digital tool allows the parametric modeling of the structure that, together with an Upper bound limit analysis tool and a heuristic optimization solver, enables tracking the most prone failure mechanism. At a second step, a coupled concurrent FE model with micro-and macro-scales is assumed. A micro-modeling description of the masonry is allocated to regions within the failure mechanism found in the former step. In converse, the other domain regions are modeled via a macro-approach, whose constitutive response is elastic and orthotropic and formulated through closed-form homogenized-based solutions. The application of the framework is based on non-linear static (pushover) analysis and conducted on three benchmarks: (i) an in-plane loaded URM shear wall; (ii) a U-shaped URM structure; and (iii) a URM church. Results are given in terms of load capacity curves, total displacement fields, and computational running time; and compared against those found with a FE microscopic model and with a limit analysis tool. Lastly, conclusions on the potential of the framework and future research streams are addressed.

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Section: Upper-bound Limit Analysismentioning

confidence: 99%

A Concurrent Micro/Macro Fe-Model Optimized With a Limit Analysis Tool for the Assessment of Dry-Joint Masonry Structures

Funari

Silva

Savalle

et al. 2022

Int J Mult Comp Eng

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“…In this section, the two most obtained failure modes (FM-1 and FM-4) are revisited and analyzed according to the displacementbased approach defined by the Italian building code [65]. In contrast to the classical force-displacement approach [66], which only provides the load multiplier that activates the failure mechanism, the displacement-based approach considers varied kinematic configurations to evaluate the curve descending branch [67,68,69].…”

Section: Simplified Macro Block Analysis Vs Drbamentioning

confidence: 99%

Probabilistic approach to assess URM walls with openings using discrete rigid block analysis (D-RBA)

Pulatsu

Gönen²,

Parisi

et al. 2022

Journal of Building Engineering

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“…The main aim of this paper is to develop a novel, multi-level integrated modelling procedure that uses a combination of upper bound limit analysis [14,28] and non-linear dynamic (rocking) analysis [26] for the seismic collapse assessment of any user-defined structural configuration. In the first step, parametric modelling of the macro-block geometry is conducted, enabling exploration of the domain of possible solutions using the upper bound method of limit analysis.…”

Section: Introductionmentioning

confidence: 99%

A Tool for the Rapid Seismic Assessment of Historic Masonry Structures Based on Limit Analysis Optimisation and Rocking Dynamics

2021

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This paper presents a user-friendly, CAD-interfaced methodology for the rapid seismic assessment of historic masonry structures. The proposed multi-level procedure consists of a two-step analysis that combines upper bound limit analysis with non-linear dynamic (rocking) analysis to solve for seismic collapse in a computationally-efficient manner. In the first step, the failure mechanisms are defined by means of parameterization of the failure surfaces. Hence, the upper bound limit theorem of the limit analysis, coupled with a heuristic solver, is subsequently adopted to search for the load multiplier’s minimum value and the macro-block geometry. In the second step, the kinematic constants defining the rocking equation of motion are automatically computed for the refined macro-block model, which can be solved for representative time-histories. The proposed methodology has been entirely integrated in the user-friendly visual programming environment offered by Rhinoceros3D + Grasshopper, allowing it to be used by students, researchers and practicing structural engineers. Unlike time-consuming advanced methods of analysis, the proposed method allows users to perform a seismic assessment of masonry buildings in a rapid and computationally-efficient manner. Such an approach is particularly useful for territorial scale vulnerability analysis (e.g., for risk assessment and mitigation historic city centres) or as post-seismic event response (when the safety and stability of a large number of buildings need to be assessed with limited resources). The capabilities of the tool are demonstrated by comparing its predictions with those arising from the literature as well as from code-based assessment methods for three case studies.

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A digital tool based on Genetic Algorithms and Limit Analysis for the seismic assessment of historic masonry buildings

Cited by 7 publications

References 22 publications

A Concurrent Micro/Macro Fe-Model Optimized With a Limit Analysis Tool for the Assessment of Dry-Joint Masonry Structures

A Concurrent Micro/Macro Fe-Model Optimized With a Limit Analysis Tool for the Assessment of Dry-Joint Masonry Structures

Probabilistic approach to assess URM walls with openings using discrete rigid block analysis (D-RBA)

A Tool for the Rapid Seismic Assessment of Historic Masonry Structures Based on Limit Analysis Optimisation and Rocking Dynamics

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