Abstract
The paper presents the comparison of the results obtained on a masonry building by nonlinear static analysis using different software operating in the field of continuum and discrete-macroelement modeling. The structure is inspired by an actual building, the "P. Capuzi" school in Visso (Macerata, Italy), seriously damaged following the seismic events that affected Central Italy from August 2016 to January 2017. The activity described is part of a wider research program carried out by various units involved in the ReLUIS 2017/2108—Masonry Structures project and having as its object the analysis of benchmark structures for the evaluation of the reliability of software packages. The comparison of analysis was carried out in relation to: global parameters (concerning the dynamic properties, capacity curves and, equivalent bilinear curves), synthetic parameters of structural safety (such as, for example, the maximum acceleration compatible with the life safety limit state) and the response in terms of simulated damage. The results allow for some insights on the use of continuum and discrete-macroelement modeling, with respect to the dispersion of the results and on the potential repercussions in the professional field. This response was also analyzed considering different approaches for the application of loads.
Highlights
The paper presents the work carried out by various research units about the analysis of benchmark structures for the evaluation of the reliability of software packages within the ReLUIS 2017/2018 project—Masonry Structures Project (Cattari et al 2019; Cattari and Magenes 2021) that aims at the seismic analysis of unreinforced masonry buildings.In particular, in this article, the results of the evaluations carried out through nonlinear static analysis on an actual case study, inspired by a real building the school "P
Within the Masonry Structures Project (Cattari and Magenes 2021; Calderoni et al.) two hypotheses have been analyzed for the benchmark structure BS5 in order to investigate the dispersion of the results provided by the different software due to the variation of different structural configurations recurring in existing buildings:
This is consistent with the assumption that this modal participation factor is calculated by most of the software with reference to the eigenvector form corresponding to the first mode regardless of the forces applied in the nonlinear static analysis
Summary
The paper presents the work carried out by various research units about the analysis of benchmark structures for the evaluation of the reliability of software packages within the ReLUIS 2017/2018 project—Masonry Structures Project (Cattari et al 2019; Cattari and Magenes 2021) that aims at the seismic analysis of unreinforced masonry buildings. For the sake of paper length, the material properties are summarized into the companion paper only (see Table 1) along with the comprehensive description of the cracking pattern and pictures of the building collected after each one of the multiple seismic events that allow for the precise inspection of cracking pattern evolution due by the accumulation of subsequent damage This aspect is of fundamental importance in the following when we aim at being comparing this cracking pattern with the outcome of the present modeling: we will make use of the conventional push-over analysis to study the structural behavior and not of the nonlinear dynamic analysis could be more appropriate for the comparison of modeled and real cracking patterns. For a comprehensive description of the input parameters please refer to the Annex—BS Input Data reported in Cattari and Magenes (2021)
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