Study on numerical simulation of seismic performance of masonry-infilled RC frame with opening and flexible connections
In order to study the effect of rubber as a new flexible connecting material on the seismic performance of masonry-infilled reinforced concrete(RC)frame with opening and flexible connections,low cyclic loading tests of 4 opening in masonry-infilled RC frame specimens with a scale ratio of 1/2 were numerically simulated.The three-dimensional separated simplified microscopic model of opening in masonry-infilled RC frame with opening and flexible connections was established by using DIANA nonlinear finite element software.Based on the flexible connection model,four rigid connection models with the same opening situation were established for comparative analysis.The results show that the separated simplified microscopic model can effectively simulate the failure law of frame structure.Compared to the rigid connection,the stiffness and strength of masonry-infilled RC frame specimens with opening and flexible connections is reduced,and the ductility is improved.The influence of openings on the frame structure with opening and flexible connection and rigid connection is similar.Four masonry-infilled RC frame with flexible connections of different opening ratios were established and the parameter analysis was carried out under the central opening form.The reduction formula of bearing capacity and stiffness of RC frame structure with masonry-infilled RC frame with opening and flexible connections was proposed.
flexible connectionmasonry-infilled RC frame with openingseismic performanceDIANA nonlinear finite element analysis
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