Modal Analysis of Masonry Structures

TL;DR

This paper introduces a numerical method integrated into NOSA-ITACA for analyzing the vibration modes of cracked masonry structures, emphasizing nonlinear elastic behavior with zero tensile strength.

Contribution

It presents a novel numerical procedure for modal analysis of masonry structures accounting for cracks and nonlinear elasticity, implemented within the NOSA-ITACA code.

Findings

Differences between linear and nonlinear vibration behaviors highlighted.

Case studies demonstrate the effectiveness of the new method.

The algorithm accurately predicts mode shapes and frequencies in cracked masonry.

Abstract

This paper presents a new numerical procedure for evaluating the vibration frequencies and mode shapes of masonry buildings in the presence of cracks. The algorithm has been implemented within the NOSA-ITACA code, which models masonry as a nonlinear elastic material with zero tensile strength. Some case studies are reported, and the differences between linear and nonlinear behavior highlighted.