客运专线大跨斜拉桥减震方案优化分析

发布时间：2018-05-02 03:01

本文选题：客运专线 + 斜拉桥　；参考：《应用基础与工程科学学报》2014年01期

【摘要】：以铁路客运专线大跨斜拉桥实际工程为研究背景,探讨了斜拉桥在纵、横向不同的抗震体系下结构的地震反应特点.通过大量的非线性时程反应分析,对黏滞液体阻尼器的布设位置及力学参数进行了优化分析.结果表明,沿纵桥向在塔梁间设置黏滞液体阻尼器,并合理选择阻尼器的力学参数,可显著降低主塔纵桥向的结构内力、塔顶位移以及塔梁间相对运动位移;沿纵桥向在塔梁间及辅助墩顶同时设置阻尼器则不仅可降低辅助墩及主塔的结构内力,还可有效提高塔顶位移及塔梁间相对运动位移的减震效果;沿横桥向仅在过渡墩、辅助墩顶设置阻尼器可显著降低过渡墩及辅助墩的墩身及其桩基础的横向地震反应.
[Abstract]:Based on the actual project of long-span cable-stayed bridge in railway passenger dedicated line, the characteristics of seismic response of cable-stayed bridge under different seismic systems are discussed. The location and mechanical parameters of viscous liquid dampers are optimized by a large number of nonlinear time-history response analysis. The results show that the viscous liquid dampers are arranged along the longitudinal bridge direction and the mechanical parameters of the dampers are reasonably selected. The internal force of the main tower longitudinal bridge the displacement of the tower top and the relative displacement between the towers and beams can be significantly reduced by the installation of viscous liquid dampers along the longitudinal bridge direction of the tower and the reasonable selection of the mechanical parameters of the dampers. Installing dampers along the longitudinal bridge direction at the same time between the tower beam and the top of the auxiliary pier can not only reduce the internal force of the auxiliary pier and the main tower, but also effectively improve the shock absorption effect of the tower top displacement and the relative movement displacement between the tower and beam. The installation of dampers at the top of auxiliary piers can significantly reduce the lateral seismic response of the piers and their foundations of transition piers and auxiliary piers.
【作者单位】：兰州交通大学甘肃省道路桥梁与地下工程重点实验室;兰州交通大学土木工程学院;
【基金】：国家自然科学基金项目(51368034,51068017) 长江学者和创新团队发展计划资助(IRT1139) 甘肃省高等学校基本科研业务费项目
【分类号】：U448.27;U442.55

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