论文部分内容阅读
以195m墩高的赫章特大桥为例,运用Midas/Civil程序建立三维梁单元模型,研究了桥墩部分设计参数对超高墩大跨度连续刚构桥地震时程响应的影响。结果表明:主墩墩高的变化对全桥动力特性影响显著,墩顶位移与墩高呈近似线性关系,但墩高变化对墩底弯矩的影响不显著;主墩坡率变化仅对坡率改变方向的地震响应有较大影响。
Taking Hezhang Bridge with a height of 195m as an example, a three - dimensional beam element model is established by using Midas / Civil program and the influence of design parameters of bridge pier on the seismic response of the long - span continuous rigid frame bridge with ultra - high pier is studied. The results show that the variation of pier height has a significant effect on the dynamic characteristics of the whole bridge. The displacement at the pier top has an approximately linear relationship with the pier height, but the influence of the pier height variation on the moment at the pier bottom is insignificant. The rate of change in the direction of the earthquake response has a greater impact.