A Two-step Approach for the Seismic Assessment of Masonry Structures Accounting for the Actual Masonry Pattern

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A Two-step Approach for the Seismic Assessment of Masonry Structures Accounting for the Actual Masonry Pattern
Conference
COMPDYN 2023
Title
A Two-step Approach for the Seismic Assessment of Masonry Structures Accounting for the Actual Masonry Pattern
Authors
Simon Szabó, Marco F. Funari, Antonio Maria D'Altri, Stefano de Miranda, and Paulo B. Lourenço
Date
July 17, 2023
ABSTRACT

Seismic assessment of masonry structures is a pressing concern in the scientific community. Over the last few decades, significant progress has been made in developing numerical mod-elling strategies for masonry. However, due to the unique mechanics of masonry, which ex-hibit a quasi-brittle and anisotropic behaviour, there is no trade-off between accuracy and computational efficiency when conducting numerical simulations of masonry structures. This study proposes a new approach to conduct in-plane numerical simulations of masonry struc-tures, which couple limit and pushover analyses considering the actual masonry pattern. The first step of the procedure involves a block-based limit analysis, which considers the actual masonry pattern. Macroblocks, i.e., the portions which compose the collapse mechanism, are then identified using an ad-hoc algorithm that searches for the pivot point of the obtained failure mechanisms. In the second step, a pushover analysis is conducted on the simplified structure composed of macroblocks, considered as continuum bodies, interacting via fric-tional interfaces. The proposed approach is preliminary tested on two structural-scale benchmarks made of dry-stack masonry, showing promising results.

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