公路斜拉桥抗震设计方法  

Seismic Design Method of Highway Cable-Stayed Bridge

作　　者：高斌 GAO Bin(CCCC First Highway Consultants Co.Ltd.,Xi'an 710000,China)

机构地区：[1]中交第一公路勘察设计研究院有限公司,西安710000

出　　处：《工程建设与设计》2023年第22期77-79,共3页Construction & Design for Engineering

摘　　要：以某独塔斜拉桥为例,桥跨为89 m+245 m+185 m,通过构建有限元模型,对比分析结构地震内力和位移响应在不同抗震设防体系时的具体表现,根据抗震效果最佳化的原则,提出弹性索结合拉索减震支座的抗震方案。研究结果表明,在塔梁上安装弹性索后,具有限制地震位移和主塔内力的作用,桥墩的抗震性能显著提高,地震位移得到控制,表明弹性索和斜拉减震支座相组合的方案具有可行性。This study takes a single tower cable-stayed bridge as an example,the span ofthe bridge is 89 m+245 m+185 m,the finite element model is built,and the concrete performance of the seismic internal force and displacement response of the structure in different seismic fortification systems is compared and analyzed.According to the principle of the optimal seismic effect,the seismic scheme of elastic cable combined with cable bearing is proposed.The results show that the installation of elastic cable on the tower beam can limit the seismic displacement and the internal force of the main tower,and the seismic performance of the pier is significantly improved and the seismic displacement is controlled,which indicates that the comprehensive scheme ofelastic cable and cable-stayed damping support is feasible.

关 键 词：斜拉桥 抗震性能 有限元模型 抗震体系 

分 类 号：U442.55[建筑科学—桥梁与隧道工程]