【摘要】 现行结构设计中楼梯间通常不参与结构整体计算,大震作用下不仅影响结构刚度,楼梯间构件也会受到不同程度的破坏。柔性连接楼梯间释放了梯段的斜撑作用,可使梯板免于破坏。本文楼梯间采用减震支座连接,支座采用非线性连接单元模拟,滞回模型采用Bouc-Wen模型,对比分析了罕遇地震激励下刚性连接、滑移和减震连接楼梯间的地震响应及薄弱部位,并通过改变拉梁与梯柱的截面,分析了楼梯间的破坏模式。基于刚度比的计算结果表明:大震作用下柔性连接楼梯间不易破坏,减震连接楼梯间的破坏模式和梯柱与拉梁的刚度比相关。更多还原

【Abstract】 The current structural design of staircase is usually not involved in the integral calculation. Under rare earthquake,the staircase components would be affected by different degrees of damage,and the structure stiffness also would be affected. The bench brace effect is released by flexible connection,and the staircase is saved from damage. In this paper,isolation connection is mployed in the staircase,nonlinear connection element is used to simulate the bearing. Through comparative analysis of the rigid connection,sliding and damping connecting staircases earthquake response and the weak parts,by changing the cross section of ladder column with ladder beam,the failure mode of the staircase is analyzed. The calculation results which based on the stiffness ratio show that: flexible connecting staircase is not easy to damage,and the vibration failure mode of staircase is associated with the stiffness ratio.更多还原