Rigid block and finite element analysis of settlement-induced failure mechanisms in historic masonry wall panels

Gagliardo, Raffaele; Cascini, Leonardo; Portioli, Francesco; Landolfo, Raffaele; Tomaselli, Giovanni; Malena, Marialaura; Felice, Gianmarco de

doi:10.3221/igf-esis.51.39

Cited by 9 publications

(7 citation statements)

References 25 publications

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“…Computational limit analysis, as adopted here, is largely recognized as a very effective tool to estimate collapse load and collapse mechanisms for masonry structures Trovalusci, 1998, 2000;Milani, 2011;Milani and Taliercio, 2016;Rossi et al, 2020;Cascini et al, 2020;Grillanda et al, 2019) or masonry structures in presence of settlements (Landolfo et al, 2020;Pepe et al, 2020b). The code is used to determine the failure configuration of dry joints masonry arches, modelling the arches (according to a microscale approach) as an assemblage of rigid blocks in contact through frictional and no-tension interfaces.…”

Section: Introductionmentioning

confidence: 99%

Limit analysis approach for the in-plane collapse of masonry arches

Pepe

Pingaro

Trovalusci

2021

Proceedings of the Institution of Civil Engineers - Engineering

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The present paper deals with the numerical evaluation of the in-plane collapse behaviour of unreinforced masonry arches and portals characterized by different geometries subjected to several loading conditions and modelled as assemblages of rigid blocks in contact through no-tensional and frictional interfaces. This study has been conducted using a new in-house code, which represents the updated version of the numerical procedure presented in the pioneering work of Baggio and Trovalusci (2000). The minimization problem corresponding to the Upper Bound (or kinematic) approach of Limit Analysis is written as a Linear Programming Problem solved taking advantages of the algorithms nowadays available. An important feature of the code is the capability to provide information about the sliding collapse of masonry structures, adopting the assumption of dilatancy in the analytic description of the yielding surface, permitting to overcome the classical Heyman's hypothesis which limited the investigation of collapse to only hinging modes. A key contribution of the work is the comparison of results in terms of collapse multipliers and collapse mechanisms considering different literature contributes as benchmark references. The presented study reveals the suitability of approaches based on mathematical programming and the crucial role played by sliding.

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Section: Introductionmentioning

confidence: 99%

Limit analysis approach for the in-plane collapse of masonry arches

Pepe

Pingaro

Trovalusci

2021

Proceedings of the Institution of Civil Engineers - Engineering

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“…The model has been implemented in a FE code to carry step by step analyses of structures subject to external loads. The same model has been adopted for the solution of several problems: soil-structure interaction [39], collapse mechanism analysis under horizontal forces [5,40] and effect of settlements [41,42].…”

Section: Finite Element Model Of the Macro-elementsmentioning

confidence: 99%

Two Steps Procedure for the Finite Elements Seismic Analysis of the Casamari Gothic Church

et al. 2022

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The structural analysis of historic masonry churches subject to earthquakes is commonly based on two distinct approaches: that of the global response to seismic actions and that of the local analysis of a priori pre-determined collapse mechanisms. This is a conventional decoupling of the structural problem due to the difficulty of addressing the seismic vulnerability of individual parts from the modelling of the whole. The aim of this work is to establish a link between the global behavior of the church and the assessment of the local mechanisms, re-evaluating the value of modal analysis to be associated with non-linear seismic assessment. With this aim, a two steps procedure is proposed, where: the first step is based on the detection of the main vibration modes of the whole building with identification of the structural bi-dimensional macro-elements that are responsible for the overall seismic vulnerability, while the second step, is based on the non-linear finite element analysis of the previously identified macro-elements, to evaluate the failure pattern caused by the earthquakes. The procedure will applied to the case study of the Casamari Gothic church in Veroli (Italy).

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“…The behaviour of masonry when subjected to ground movements has been investigated resorting to different modelling techniques, i.e. limit analysis Cascini, 2016, 2017), energy-based methods (Iannuzzo et al 2017) finite element method (Giardina et al 2013, Franza et al 2020 and more recently systematic studies on their compared performances have been conducted (Gagliardo et al, 2020, Pepe et al, 2020.…”

Section: Adopted Constitutive Modelsmentioning

confidence: 99%