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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。
In order to study the dynamic characteristics and the failure mode of the semi-rigid composite frame under earthquake, a shaking table test for a full-scale semi-rigid composite frame composite beam model is provided for the seismic design of semi-rigid frame and its use in the earthquake region. the study. Through experiments, the dynamic characteristics, displacement response, acceleration response, internal force response and structural failure mode of semi-rigid composite beams under the action of small earthquakes, moderate earthquakes and large earthquakes are analyzed. The results show that the semi-rigid composite frame has good seismic performance. Under the effect of rare earthquakes (1.20g), the whole structure still has no obvious damage, and the structural failure mode is that the semi-rigid composite beam and the column foot produce larger Plastic deformation, semi-rigid connection frame structure can be used in areas with high seismic fortification intensity. The finite element analysis model is set up for the experimental framework, and the nonlinear dynamic time history analysis of the structure is carried out. The calculated results are in good agreement with the experimental results.