【摘要】 为了研究半刚性连接组合梁框架在地震作用下动力特性以及破坏模式,为半刚性框架抗震设计及在地震区的使用提供依据,进行了1个足尺半刚性连接组合梁框架结构模型振动台试验研究。通过试验,分析了小震、中震和大震作用下半刚性连接组合梁框架结构的动力特性、位移反应、加速度反应、半刚性组合节点内力反应、结构破坏模式。研究结果表明:半刚性连接组合梁框架具有较好的抗震性能,在罕遇地震作用下(1.20g),整体结构仍然没有明显损坏,结构破坏形式为半刚性组合节点和柱脚处产生较大塑性变形,半刚性连接框架结构完全可以在高抗震设防烈度地区使用。对试验框架建立有限元分析模型,进行结构的非线性动力时程分析,计算结果与试验结果较为接近。更多还原

【Abstract】 In order to study the seismic behavior of steel frame with semi-rigid connections in seismic area,a full-scale model of composite frame with semi-rigid connection was tested on the shaking table.The dynamic characteristics,seismic responses,failure mode of the structure were recorded and analyzed.The test results indicate that the seismic behavior of semi-rigidly connected steel frame is well,and under super strong motion earthquake(peak value of acceleration is 1.20g),there is little obvious damage in the columns and beams.The composite frame with semi-rigid connection is of a failure mode of plastic displacement of semi-rigid composite connections and column base.The composite frame with semi-rigid connection can be used in seismic area.The FE analysis model of test frame was proposed,and nonlinear dynamic time-history analysis of structure was performed.The maximum relative displacements of FE analysis and experiment are well agreed.更多还原