Comparative Seismic Response of Masonry Buildings Modelled By Beam and Solid Elements

Abstract eng:
The paper is aimed at evaluating the relative accuracy of beam element modelling and solid element modelling in assessing the seismic capacity of unreinforced low-rise masonry buildings. Three-storey buildings were analysed, assuming geometry and mechanical parameters to be representative of typical low-rise tuff masonry buildings, frequently found in seismic areas of Southern Italy. The most critical and controversial features of masonry building modelling by means of beam elements are initially presented and discussed. Subsequently, comparative pushover analyses, performed varying building geometry and modelling approach are presented and the quantitative (lateral strengths and displacements) and qualitative (failure mechanisms) differences are discussed. A major goal of this paper is to assess the influence of the modelling approach on code safety checks performed using the capacity spectrum method. The crucial points are emphasized and the feasible different assumptions for assessing the maximum building top displacement in both the considered modelling approaches are argued. Conclusive remarks show how the building modelling technique affects both the maximum building capacity in displacement and the earthquake displacement demand.

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