高矮塔斜拉桥横向减震体系关键参数联合优化

doi:10.16265/j.cnki.issn1003-3033.2021.04.010

中国安全科学学报 ›› 2021, Vol. 31 ›› Issue (4): 72-80.doi: 10.16265/j.cnki.issn1003-3033.2021.04.010

高矮塔斜拉桥横向减震体系关键参数联合优化

赵国辉副教授, 潘佑东

长安大学陕西省公路桥梁与隧道重点实验室,陕西西安 710064

收稿日期:2021-01-11 修回日期:2021-03-13 出版日期:2021-04-28 发布日期:2021-12-20
作者简介:赵国辉 (1978—),男,河北邯郸人,博士,副教授,主要从事桥梁抗风抗震及振动控制方面的研究。E-mail: zhaoguohui@chd.edu.cn。
基金资助:
云南省交通科技项目([2018]13号)。

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

ZHAO Guohui, PAN Youdong

Shaanxi Provincial Key Laboratory of Bridges and Tunnels, Chang'an University, Xi'an Shaanxi 710064, China

Received:2021-01-11 Revised:2021-03-13 Online:2021-04-28 Published:2021-12-20

摘要/Abstract

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。

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

Abstract: 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.

Key words: cable-stayed bridges with unequal height pylons, transverse seismic isolation system, joint optimization of parameters, orthogonal test design, coupling effect

中图分类号:

赵国辉, 潘佑东. 高矮塔斜拉桥横向减震体系关键参数联合优化[J]. 中国安全科学学报, 2021, 31(4): 72-80.

ZHAO Guohui, PAN Youdong. Joint optimization of key parameters of transverse seismic isolation system for cable-stayed bridge with unequal height pylons[J]. China Safety Science Journal, 2021, 31(4): 72-80.

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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

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