基于静力试验的梁端铰型受控摇摆钢筋 混凝土框架地震响应数值分析

Numerical Analysis of Seismic Performance of a Controlled Rocking RC Frame with Beam-end Hinge Based on Static Test

梁端铰型受控摇摆钢筋混凝土框架结构(CR-RCFB)是一种新型可恢复功能结构。首先介绍了CR-RCFB结构的振动台试验,试验后结构主体构件没有损坏,仅可更换的耗能装置失效;其次对CR-RCFB结构进行低周反复加载试验,得到节点的弯矩-转角滞回曲线、骨架曲线和转动刚度,并将实测力学参数提供给数值分析模型;采用ABAQUS软件建立了CR-RCFB无控结构与有控结构的有限元数值计算模型,对上述模型进行地震动时程分析,得到了结构动力特性和不同地震作用下的加速度响应和位移响应,并与振动台试验结果进行对比分析。研究结果表明,将静力试验得到的实测参数输入计算模型得到的数值模拟结果与振动台试验结果吻合良好。

Controlled rocking reinforced concrete frame with beam-end hinges(CR-RCFB)is a new type of resilient structure.Firstly,the shaking table test of a CR-RCFB structure was introduced.After the shaking table test,the main components of the structure were still in elastic status,only the replaceable energy dissipation device failed.Secondly,CR-RCFB was subjected to cyclic static loading tests,and the hysteretic curve,skeleton curve and rotational stiffness of the joints were obtained,and the measured mechanical parameters were substituted into the numerical model.By using the ABAQUS software the finite element models of CR-RCFB structures were established.Time-history analysis was carried out to obtain the dynamic characteristics and earthquake responses of the structure,and the acceleration and inter-story displacement responses were compared with the shaking table test results.The results show that the numerical simulation results are in good agreement with the shaking table test results.