Seismic Performance Target Of Infilled RC Frame Structures Under In-plane And Out-of-plane Loadings

Masonry infilled wall reinforced concrete（RC）frame structure is a common building structure.In earthquake damage,unpredictable losses are often caused by the damage of infilled wall.However,in the seismic design of actual structures,designers generally consider the infilled wall as a non structural component,ignoring the impact of the infilled wall on the overall structure in the earthquake.Therefore,how to determine the behavior target of infilled wall has become an important basis for the performance-based seismic performance evaluation and design of infilled wall frame structure.Based on the scale quasi-static test,this paper studies the masonry infilled wall in the following aspects in order to put forward the performance target that can be used in engineering practice and experimental research,the following aspects of masonry infilled wall are studied:（1）In order to understand the failure mode of infilled wall in detail,the in-plane and out of plane quasi-static loading tests of masonry infilled wall RC frame structure are carried out.In the test,observe and record the failure mode,inter story displacement angle and out of plane center point displacement of the infilled wall,analyze the skeleton curve,energy dissipation capacity and crack width of the infilled wall,and focus on summarizing the failure mode of the infilled wall in the test process.It provides experimental basis for proposing in-plane and out of plane performance targets.（2）The experimental literature of non load-bearing masonry infilled wall is collected.According to the characteristics of crack development and elastic-plastic development of infilled wall,the damage criterion,the performance target and damage index of in-plane failure of infilled wall are summarized and put forward.Taking infilled wall RC frame structure as the research object,the seismic vulnerability of infilled wall under in-plane load is studied.（3）Summarize the factors affecting the out of plane failure of the infilled wall,collect the test data,divide the damage and failure stages of the infilled wall,establish the out of plane damage judgment criteria of the infilled wall,put forward the performance target and damage index formula that can characterize the out of plane failure state of the infilled wall,and give the damage index of each damage stage.The seismic vulnerability of infilled wall under out of plane load is studied.