Time-History Seismic Analysis of Masonry Buildings: A Comparison between Two Non-Linear Modelling Approaches

Buildings

Michele Betti¹  Luciano Galano²  Andrea Vignoli² 

[1] Department of Civil and Environmental Engineering (DICeA), University of Florence, Via di Santa Marta, 3-I-50139 Firenze, Italy;

关键词: unreinforced masonry buildings;    finite element (FE) models;    macro-element (ME) models;    time-history non-linear analysis;    seismic loading;    flexible diaphragms;   

DOI  :  10.3390/buildings5020597

来源: mdpi

【 摘 要 】

The paper presents a comparison between two numerical modelling approaches employed to investigate the seismic behavior of unreinforced masonry buildings with flexible diaphragms. The comparison is performed analyzing a two-story prototype tested on a shaking table at the CNR-ENEA research center of Casaccia (Italy). The first numerical model was built by using the finite element (FE) technique, while the second one was built by a simplified macro-element (ME) approach. Both models were employed to perform non-linear dynamic analyses, integrating the equations of motion by step-by-step procedures. The shaking table tests were simulated to analyze the behavior of the prototype from the initial elastic state until the development of extensive damage. The main results of the analyses are discussed and critically compared in terms of engineering parameters, such as accelerations, displacements and base shears. The effectiveness of both models within the investigated typology of buildings is then evaluated in depth.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.