论文部分内容阅读
为研究实腹式型钢混凝土异形柱框架结构的抗震性能,以一榀三层两跨异形柱中框架为原型进行整体结构抗震混合试验。基于试验装置构建的OpenSees-OpenFresco-MTS混合试验系统,分别选取底层十字形截面中柱和T形截面边柱作为试验单元,利用四联杆设备对其进行加载,其余部分作为计算单元基于OpenSees软件进行时程分析。通过观察不同试件的受力过程及破坏特征,分别获得试验单元和整体框架的动力反应,对比分析了其滞回特性、累积耗能及刚度退化等,并对震损柱进行拟静力试验。研究结果表明:型钢混凝土十字形中柱和T形边柱试验单元及整体框架的滞回曲线饱满,耗能能力强;震损柱的前期刚度下降迅速,后期刚度下降平缓,破坏时刚度约为初始平均刚度的30%;基于不同试验单元下整体框架的耗能结果初始状态和最终状态趋于一致,体现了混合试验方法的正确性及经济性。
In order to study the anti-seismic performance of CFRP special-shaped column frame structure, a one-three-story two-span special-shaped column in the middle frame is taken as the prototype to carry out the whole structure seismic hybrid test. Based on the OpenSees-OpenFresco-MTS hybrid test system constructed by the experimental device, the bottom cruciform cross-section central column and the T-shaped cross-section side column were selected as the test unit, loaded with four-link equipment, and the rest as the calculation unit based on OpenSees software Schedule analysis. The dynamic response of the test unit and the whole frame were obtained by observing the stress process and failure characteristics of different specimens. The hysteresis characteristics, cumulative energy dissipation and stiffness degradation were compared and analyzed. The quasi-static test . The results show that the hysteretic curves of the cross-shaped central column and the T-shaped side columns of the SRC and the monolithic frame are full and the energy dissipation capability is strong. The pre-rigidity of the damaged column decreases rapidly and the rigidity decreases slowly at the late stage. Initial average stiffness of 30%. Based on the energy consumption results of the whole frame under different test units, the initial state and the final state tend to be consistent, which shows the correctness and economy of the hybrid test method.