Study On Seismic Performance Of Masonry-Infilled Frame

The masonry-infilled frame are widely used in practice, for their feature, such as flexibility and economical. In China, when we consider the impact of the masonry-infilled frame, we only provide a reduction factor for the period of this kind of structures. However, the performance of the structure will have a large change after the frame adds infills. When infills exsits, the mechanisms of force transmission will be changed, and the different mechanisms of force transmission will lead to different panels’failure mode. In order to study the seismic behavior of masonry-infilled frame under different forms, we take a test to study the seismic behavior of masonry-infilled frame, then, using the finite element analysis software ABAQUS to simulate those models, comparing results, to verify the feasibility and applicability of the models which are built by finite element analysis software, finally, establishing large number of finite element model to analyze the seismic behavior under different hole size, hole position and vertical pressure and explore the failure mode. The main contents are as follows:(1) In this paper, we take experiment to study two specimens masonry-infilled frame, compare their Hysteresis curve, Skeleton curve, Energy dissipation capacity and Stiffness degradation curve, study the seismic behavior of the masonry-infilled frame, and at last use the results to compare with the finite element model’s results.(2) Use the ABAQUS finite element analysis platform to study the in-plane seismic performance and failure mode of masonry-infilled frame with the integral finite element model and validating with the corresponding experiment data.(3) Establish some models with the proposed integral finite element model to study seismic performance and failure mode of the masonry-infilled frame. The influences of hole size, hole position and vertical pressure are analyzed.We can get some conclusions from this paper:(1) The hole size will affect the load-bearing capacity of the masonry-infilled frame, the larger the hole, the smaller the carrying capacity;(2) The location of the hole has no effect with the load-bearing capacity, but it will change failure mode of the masonry-infilled frame;(3) The vertical pressure will affect the load-bearing capacity of the masonry-infilled frame, the lager the vertical pressure, the lager the load-bearing capacity.