作　　者： ; ; ; ;

机构地区： 北京工业大学建筑工程学院工程抗震与结构诊治北京市重点实验室

出　　处： 《建筑结构学报》 2011年第6期60-67,共8页

摘　　要： 为研究多高层预制混凝土结构装配式边节点的抗震性能,采用足尺模型试验方法,对高轴压预制梁-柱-叠合板装配边节点试件在低周反复荷载作用下的开裂破坏形态、滞回特性、骨架曲线、延性与耗能等进行了研究,并与相同构件参数的整体现浇试件进行了对比。基于OPENSEES建立了考虑梁底锚固钢筋滑移的装配节点数值模型,并用试验结果加以验证,在此基础上进行了不同影响因素的参数分析。研究结果表明:此类装配式混凝土边节点核心区受力钢筋没有出现粘结破坏、锚固性能良好,其承载力、耗能性能及延性与整体现浇混凝土节点相当;柱轴压水平对节点承载力影响较小而柱截面尺寸对节点承载力影响较大,钢筋直径影响节点加卸载刚度及捏拢效应而对承载力影响较小。 In order to analyze the seismic behavior of exterior beam to column joints of large multi-story precast concrete structures,an experimental study on full-scale beam to column joint models subjected to high axial loading and reversed cyclic loading was conducted.The failure pattern,hysteretic characteristic,skeleton curve,displacement ductility and energy dissipation were analyzed.The numerical joint model taking the rebar slippage into consideration was developed based on the OPENSEES software and validated against the experimental results.Then the parametric analysis was performed.The study results indicate that the overall seismic performance of the precast joint is almost the same as that of a monolithic joint.Column section dimension has a greater impact on the capacity of joint than the loading level of the column,rebar diameter has an impact on the unloading stiffness and pinching behavior,instead of on the capacity of joint.

关 键 词： 装配式框架 边节点 低周反复荷载试验 数值模型 抗震性能

领　　域： [建筑科学] [建筑科学]