传统风格建筑钢筋混凝土框架拟动力和拟静力试验研究

Pseudo dynamic and pseudo static test study on reinforced concrete frame with traditional style building

通过对一榀1∶2缩尺传统风格建筑钢筋混凝土框架模型进行拟动力和拟静力试验,研究了传统风格建筑框架的地震反应、能量耗能、刚度退化及滞回性能等抗震性能。拟动力试验结果表明,相同地震波作用下,随着加速度的增加,结构的位移逐渐加大;不同地震波在相同峰值加速度的情况下,框架模型的位移时程曲线表现有差异,其中El Centro波影响最大,汶川波影响最小。拟静力试验结果表明,框架滞回曲线较为丰满,说明在低周反复荷载作用下具有较强的耗能能力。框架柱柱顶由于内插了方钢管柱,节点核心区的抗裂性能得到了很大的提升,节点刚性制约了梁柱节点的变形,从而提高了整个框架的抗震性能和变形恢复能力。

The seismic performances including seismic behavior,energy dissipation,stiffness degradation and hysteretic behavior were studied of a 1∶ 2 scaled traditional style reinforced concrete frame model by pseudo dynamic and pseudo static tests. The results of the pseudo dynamic test show that the displacement of the structure increases with the increase of the acceleration of the same seismic wave. The displacement time-history curve of the frame model is different for different seismic waves under the same peak acceleration,and the El Centro wave has the largest effect and Wenchuan wave has minimal effect. The pseudo static test results show that the hysteresis curve of the frame is more plentiful,which shows that it has strong energy dissipation capacity under the action of low cyclic reversed load. The crack resistance of the core area of the frame is greatly improved due to the interpolation of the square steel column. The rigidity of the joint restricts the deformation of the beam and column joints,thus improving the seismic performance and deformation recovery ability of the whole frame.