In order to study the effect of rubber as a new type of flexible connection material on the seismic performance of masonry-infilled RC frame structure,based on low-cycle reversed loading tests of seven 1/2 scale masonry-infilled RC frame structure,DIANA finite element software was used to analyze the influence of the connection mode between the filled wall and the frame,block materials,flexible connection materials and mortar strength on the seismic performance of the masonry-infilled RC frame structure.The results show that,compared to the rigid connection,rubber as the new flexible connection material can slow down the strength and stiffness degradation of the structure,greatly reduce the damage degree of the structure,and significantly improve the seismic performance of the structure.Both high elastic rubber and high damping rubber as flexible connection materials show excellent seismic performance,while expandable polystyrene(EPS)board as flexible connection materials show worse seismic performance than rubber.Different block materials have a great influence on the seismic performance of the structure under the rigid connection mode.It is suggested to adopt flexible connection mode to weaken the wall-frame interaction when the block materials with high strength are used.Reasonably reducing the strength grade of mortar can change the failure mode of the filled wall,which is beneficial to the earthquake resistance.
masonry-infilled RC frame structureflexible connectionrigid connectionnonlinear finite element analysis
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