[1]牛建涛,丁阳,石运东.应用新型油阻尼器的斜拉桥横向减震体系[J].地震工程与工程振动,2019,39(02):111-120.[doi:10.13197/j.eeev.2019.02.111.niujt.012]
 NIU Jiantao,DING Yang,SHI Yundong.Transverse seismic reduction system of cable-stayed bridge introducing oil damper[J].EARTHQUAKE ENGINEERING AND ENGINEERING DYNAMICS,2019,39(02):111-120.[doi:10.13197/j.eeev.2019.02.111.niujt.012]
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应用新型油阻尼器的斜拉桥横向减震体系
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《地震工程与工程振动》[ISSN:/CN:]

卷:
39
期数:
2019年02
页码:
111-120
栏目:
论文
出版日期:
2019-04-30

文章信息/Info

Title:
Transverse seismic reduction system of cable-stayed bridge introducing oil damper
作者:
牛建涛1 丁阳12 石运东12
1. 天津大学 建筑工程学院, 天津 300350;
2. 天津大学 滨海土木工程结构与安全教育部重点实验室(天津大学), 天津 300072
Author(s):
NIU Jiantao1 DING Yang12 SHI Yundong12
1. School of Civil Engineering, Tianjin University, Tianjin 300350, China;
2. Key Laboratory of Coast Civil Structure Safety of Ministry of Education, Tianjin University, Tianjin 300072, China
关键词:
斜拉桥减震体系时程分析法油阻尼器横桥向
Keywords:
cable-stayed bridgeseismic systemtime-history analysis methodoil dampertransverse direction
分类号:
U442.5+5
DOI:
10.13197/j.eeev.2019.02.111.niujt.012
摘要:
为解决斜拉桥横向塔-梁、墩-梁固结体系导致地震响应过大的问题,兼顾斜拉桥横向抗风、隔震需求,基于溢流阀及油阻尼器性能,设计了一种刚度可变的新型油阻尼器,进而提出油阻尼器与滑动球型钢支座、油阻尼器与叠层橡胶支座并用的两种横向减震体系。以某近海双塔双索面斜拉桥为研究对象建立有限元模型,利用时程法计算两种体系减震效果。结果表明:相对于传统的塔-梁固结体系,应用两种减震体系时,塔底弯矩分别降低44.9%、43.6%,塔底剪力分别降低40.7%、39.0%,且不会引起过大支座位移、残余位移。滑动球型钢支座刚度低,地震响应更小,但缺乏回复机制,支座残余位移稍大;叠层橡胶支座刚度较高,残余位移小,但高刚度使各构件承受更大惯性力,达到相同减震效果需阻尼器提供更高出力。两种塔-梁减震体系各有优劣,但均具有较好的减震效果,均可应用于斜拉桥横向减震。
Abstract:
In order to reduce the excessive seismic response caused by rigid connection between tower and deck, pier and deck in the transverse direction, a new type of oil damper which has bilinear stiffness characteristic was designed based on the properties of the overflow valve and oil damper. Oil damper was used to build two transversal seismic systems with sliding steel ball bearing and laminated rubber bearing, respectively. A finite element model was established based on an offshore cable-stayed bridge with double pylons and double cable planes. Seismic responses of the cable-stayed bridge with the two systems were studied with time history analysis method. The results show that, when equipping with sliding steel ball bearing and laminated rubber bearing, seismic moments of tower reduce 44.9% and 43.6%, shears of tower reduce 40.7% and 39.0%, respectively. No excessive bearing displacements and residual displacements will be motivated. The stiffness of sliding steel ball bearings are lower and the seismic responses are smaller, but the residual displacements are larger because no restore mechanism exists. The stiffness of laminated rubber bearings are larger and the residual displacements are smaller, but the high stiffness induce greater inertia force, so more damping forces are needed to get the same seismic mitigation effect. Each of the two seismic systems has its own advantages and disadvantages, but both have good seismic mitigation effect and can be applied to the transverse isolation of cable-stayed bridge.

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备注/Memo

备注/Memo:
收稿日期:2018-5-28;改回日期:2018-8-24。
基金项目:国家自然科学基金面上项目(51378343);国家重点基础研究发展计划(2011CB013606)
作者简介:牛建涛(1989-),男,博士研究生,主要从事桥梁抗震研究.E-mail:niujiant@126.com
通讯作者:丁阳(1966-),女,教授,博士,主要从事钢结构与空间结构设计理论及工程应用研究.E-mail:dingyang@tju.edu.cn
更新日期/Last Update: 1900-01-01