Modeling of Masonry Infill Panels for Dynamic Analysis

Abstract eng:
The performance of reinforced concrete (RC) infilled frames during earthquakes shows that the behaviour is very much dependent on the performance and mode of failure of the infill masonry walls. The concrete frame may fail as a consequence of the infill wall failure before reaching the bare frame load resistance levels. Even though frameinfill interaction has sometimes led to undesirable structural performance, recent studies have shown that a properly designed infilled frame can be superior to a bare frame in terms of stiffness, strength, and energy dissipation. The objective of this paper is to present a new finite element model based on prescribed failure planes in the infill panels, where Drucker-Prager failure criterion is used to simulate the behaviour of masonry. Interface elements are used to describe the behaviour of masonry panel along the prescribed failure planes. The elasto-plastic behaviour of mortar and cracked masonry along the failure planes are considered in the analysis. The proposed model was incorporated in a generic nonlinear structural analysis program for static and dynamic analysis of masonry infilled reinforced concrete frames. Simulations of experimental force-deformation behaviour of large scale infilled frame are performed to validate the proposed model.

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