高矮塔斜拉桥横向减震体系关键参数联合优化  

Joint optimization of key parameters of transverse seismic isolation system for cable-stayed bridge with unequal height pylons

作　　者：赵国辉[1] 潘佑东 ZHAO Guohui;PAN Youdong(Shaanxi Provincial Key Laboratory of Bridges and Tunnels,Chang'an University,Xi'an Shaanxi 710064,China)

机构地区：[1]长安大学陕西省公路桥梁与隧道重点实验室,陕西西安710064

出　　处：《中国安全科学学报》2021年第4期72-80,共9页China Safety Science Journal

基　　金：云南省交通科技项目([2018]13号)。

摘　　要：为探究由钢阻尼器与抗风支座组成的横向减震体系关键参数对斜拉桥横向地震响应的影响,以某高矮塔斜拉桥为例,基于结构内力与位移响应相平衡的原则,运用正交试验设计法设定参数联合优化的分析工况,分别以结构内力与位移响应、钢阻尼器耗能为优化指标,探究算例中减震体系关键参数钢阻尼器屈服力及抗风支座初始间隙对优化指标的影响。结果表明:辅助墩内力及高塔侧边跨主梁梁端位移响应的控制因子具有显著的参数耦合效应,参数优化时需联合考虑;在墩台设置钢阻尼器可显著降低辅助墩内力及梁端位移响应,但不能有效降低桥塔内力响应。In order to explore influence of key parameters of transverse seismic isolation system,which consisted of steel dampers and anti-wind supports,on transverse seismic response of cable-stayed bridges,taking a cable-stayed bridge with unequal height pylons as an example,orthogonal test design method was used to set analysis conditions for joint optimization of parameters based on balance principle between structural internal force and displacement response.Then,internal force and displacement response,and energy dissipation of steel dampers were set as optimized indexes,and influence of steel dampers’yield force and anti-wind supports’initial clearance on these indexes was studied.The results show that significant parameter coupling effect is observed from internal force of auxiliary pier and displacement response of side-span beam end at higher pylon side,so joint optimization should be considered.Moreover,internal force and displacement response can be significantly decreased by setting steel dampers on abutments and piers,but not the internal force response of pylons.

关 键 词：高矮塔斜拉桥 横向减震体系 参数联合优化 正交试验设计 耦合效应 

分 类 号：X924.4[环境科学与工程—安全科学] U442.55[建筑科学—桥梁与隧道工程]