高架连续梁桥动力计算研究

Study on the dynamic model of continuous girder viaduct

箱形截面是大跨度连续梁桥优先采用的截面形式,选择合适的箱梁动力分析模型是正确进行高架连续梁桥动力计算的基础。根据桥梁工程中常用的梯形截面箱梁桥的结构特点,应用薄壁梁段有限元方法,考虑箱梁横向弯扭耦合、扭转变形、畸变、桥墩变形和盆式橡胶支座等对箱梁桥动力性能垢影响,提出了高架连续梯形截面箱梁桥的动力计算模型,对某大型高架连续箱梁桥的振动特性进行了计算,所得结果对了解该桥的动态特性、建立桥梁的健康档案具有重要作用。

Box girders are preferential forms used in long span-bridges,and the selecion of a suitable dynamic mod-el is an important subject for analyzing the vibration behavior of continuous girder viaduct.In this paper,based on structural characteristic of bridges wigy box girders,shell element method is adopted the bending,torsion,distortion of box girder and derormation of pot typerubber bearing are considered,the dynamic model of continuous girders with trapezoidal section is pesented,and the dynamical character...