考虑边界非线性的高震区小箱梁桥地震响应分析

在考虑边界非线性及材料非线性的基础上,采用时程法分析了不同墩高形式下水平力分散型、高阻尼、铅芯橡胶及摩擦摆4种支座对小箱梁结构受力的影响。结果表明,铅芯橡胶与摩擦摆式减隔震支座能够有效降低地震作用下结构的纵横向响应。所得结论可为同类高震区桥梁设计提供参考。

Analysis on Seismic Response of Small-box Girder Bridge in High Seismic Area with Nonlinear Boundary

On the basis of considering the boundary nonlinearity and material nonlinearity,the time-history method is used to analyze the influence of four types of horizontal force dispersive bearing,high damping bearing,lead-core rubber bearing and friction pendulum bearing on the structure of small-box girder under the different pier heights.The results show that the lead-core rubber and friction pendulum vibration isolation bearings can effectively reduce the vertical and horizontal responses of the structure under earthquake action.The conclusions can provide references for the design of bridges in similar high earthquake areas.