摘要
为研究钢筋套筒挤压搭接连接的装配式叠合梁-预制柱框架结构的抗震性能,通过2个1/2缩尺的两层两跨装配式框架试件的拟静力试验,对其破坏形态、变形能力、承载能力等进行研究。试验结果表明:设计为"强柱弱梁"及设计为"强梁弱柱"的试件均实现预期的破坏形态;试件的水平力-位移滞回曲线较为饱满;2个试件的极限层间位移角最小分别为1/29和1/31,层间位移延性系数都大于4.0,表明试件具有很好的延性性能;套筒挤压搭接连接能有效传递钢筋拉、压力。采用有限元分析程序MSC.MARC,对装配式框架试件进行非线性数值模拟,模拟结果与试验结果吻合较好,试件KJ1按现浇框架推覆分析与按装配式框架推覆分析所得水平力-位移曲线基本一致。钢筋套筒挤压连接的装配式混凝土框架,其抗震性能满足现行规范的要求,且可按现浇框架进行内力、变形和承载力计算。
To study the seismic performance of assembled composite beam-precast column concrete frame structures with rebars lapping in pressed sleeve,quasi-static tests on two 1/2-scale assembled frame specimens with two story and two span were carried out for the failure modes,deformation capacity,load capacity and so on.The test results indicate that both the specimen designed as'strong column-weak beam'and the specimen designed as'strong beam-weak column'can achieve the expected failure modes.The lateral load-displacement hysteresis curves of the specimens are rounded;the minimum inter-story drift ratios of two specimens are 1/29 and 1/31,respectively,all the inter-story displacement ductility factors are greater than 4.0,indicating that the specimens have good ductility;the pressed sleeves can transfer the tensile and compressive force of rebars effectively;the non-linear analysis results of specimens using the finite element software MSC.MARC agree well with the experimental results,and the pushover analysis results show that the horizontal force-displacement curve of assembled specimen KJ1 is basically consistent with that of cast-in-place frame.The seismic behavior of assembled frames with rebars spliced by mechanical connection can meet the requirements in current codes,and the internal force,deformation and bearing capacity can be calculated according to the cast-in-place frame.
作者
张微敬
王桂洁
张晨骋
刘时伟
Zhang Weijing;Wang Guijie;Zhang Chencheng;Liu Shiwei(Beijing Key Lab of Earthquake Engineering and Structural Retrofit,Beijing University of Technology,Beijing 100124,China;Inner Mongolia Mengxi Engineering Design Co.,Ltd.,Hohhot 010000,China)
出处
《土木工程学报》
EI
CSCD
北大核心
2019年第5期47-58,共12页
China Civil Engineering Journal
基金
北京市自然科学基金(8152010)
城市与工程安全减灾教育部重点实验室和工程抗震与结构诊治北京市重点实验室项目(USDE201402)
关键词
装配式框架
钢筋机械连接
拟静力试验
抗震性能
有限元分析
assembled frame
rebars spliced by mechanical connection
quasi-static test
seismic behavior
finite element simulation
