【摘要】 以中新天津生态城中生大道跨蓟运河故道桥为工程背景,介绍了速度锁定支座对桥梁纵向抗震性能的影响。利用Midas/Civil软件对该桥进行了非线性时程分析,分别计算了设置普通盆式橡胶支座和设置速度锁定支座时桥梁结构的动力响应,计算中考虑了桩土相互作用。结果表明:速度锁定支座能够使活动墩与固定墩一起抵抗地震作用,固定墩墩顶剪力大幅减小;速度锁定支座使固定墩墩底弯矩明显减小,其最大弯矩几乎减小了一半,大大减小了固定墩的造价;速度锁定支座使梁端最大位移几乎减小了一半,有效地减小了梁端位移,有利于防止落梁的发生。更多还原

【Abstract】 Taking Zhongsheng Avenue Gudao Bridge crossing Ji Canal of Zhongxin Tianjin Ecological City as the engineering background, the article introduces the influence of speed lock support on the longitudinal seismic performance of bridge. The software of Midas/Civil is used to analyze the non-linear time history of this bridge, and calculates the dynamic responds of bridge structure when the ordinary pot rubber bearing and the speed lock support are set up. The calculation considers the interaction of pile and soil. The result shows that the speed lock support can make the movable pier and fixed pier resist the earthquake action together, the fixed pier top shear greatly decreases, the speed lock support makes the fixed pier bed bending moment obviously decreases, the maximum bending moment almost decreases a half greatly to decrease the construction cost of fixed pier, the speed lock support makes the maximum displacement almost decrease a half efficiently to decrease the displacement of beam end, which are favorable for preventing the beams from falling.更多还原