【摘要】 介绍了一模型比例为1/10的12层钢筋混凝土框架结构模型振动台试验,分析了模型结构在不同地震水准下的动力反应,并利用能力谱法、改进的能力谱法、Pushover分析以及时程分析对原型结构的抗震性能进行对比分析,得到了结构在不同加速度峰值作用下的性能点、顶层最大位移值、层间侧移角以及塑性铰分布情况。结果表明,该结构在输入加速度峰值为0.1g及0.2g工况时处于弹性阶段或接近屈服。能力谱法在迭代计算过程中可能不收敛,而改进的能力谱法则可以求出结构在弹性以及弹塑性阶段的性能点和顶层侧移,但是与时程分析及试验结果比较误差较大。在结构屈服后,时程分析与试验结果相比也出现一定偏差,这可能是滞回模型的选择和试验的离散性造成的。更多还原

【Abstract】 Shaking table model test of a 1/10 scale reinforcement concrete frame with 12 stories is introduced.The failure mechanism and dynamic response of the model are analyzed.Based on capacity spectrum method,improved capacity spectrum method,pushover analysis and nonlinear time history(NTH) analysis to seismic behaviors of prototype frame are evaluated under four different peak ground acceleration values.The capability point,the roof displacement and the inter-story ratio are obtained.It is shown that the model is in elastic stage when the input peak ground acceleration values are 0.1g and 0.2g.It is worth noting that the capacity spectrum method maybe not converge in calculating the target displacement,and the improved capacity spectrum method can evaluated the target displacement whether the frame is in elastic stage or nonlinear stage,but it has a bad precision for high-rise building.After the frame yields,the roof displacement and inter-story ratio calculated by NTH analysis disagree with the test results,which maybe result from the selection of hysteric model and the dispersing of the test.更多还原