摘要
研究目的:世界各地地震频发,出于结构抗震性能以及社会和经济效益考虑,需对大跨度斜拉桥的主引桥碰撞问题进行研究,以控制地震破坏程度。研究结论:(1)主引桥间距选值影响主梁残余位移变化;(2)引桥的存在可降低主梁梁端残余位移;(3)周期比、质量比、间距与主桥墩底弯矩和引桥对主桥碰撞做功的相关性分别为88%、91%;对弯矩影响程度由大到小的因素排序是:周期比(75.44%)、质量比(23.13%)、间距(1.43%);对碰撞做功影响最大的是质量比,最小的为周期比,且质量比和间距产生的是正影响,周期比产生的是负影响;(4)通过统计分析分别得到了三种因素与弯矩、碰撞做功之间的线性回归方程;(5)本研究成果可为桥梁抗震设计提供参考。
Research purposes:Earthquakes occur frequently all over the world.With the seismic performance of the structure,the social and economic benefits,it is necessary to study the collision problem of the main approach of the long-span cable-stayed bridge to control the damage caused by earthquakes.Research conclusions:(1)The selection value of the main approach bridge spacing will affect the residual displacement of main beam.(2)The approach bridge can reduce the residual displacement of main beam end.(3)The correlations of period ratio,mass ratio and spacing with bending moment of main pier bottom and collision work are 88%and 91%,respectively;The factors influencing bending moment are as follows:period ratio(75.44%),mass ratio(23.13%),spacing(1.43%);For collision work,the largest influencing factor is mass ratio,the lowest influencing factor is period ratio,and the mass ratio and spacing have a positive effect,while the period ratio has a negative effect.(4)The linear regression equations between the three factors,bending moment and collision work are obtained by statistical analysis.(5)The research results can provide reference for seismic design of bridges.
作者
张培
赵科
赵维刚
马成贤
郭进
ZHANG Pei;ZHAO Ke;ZHAO Weigang;MA Chengxian;GUO Jin(Shijiazhuang University,Shijiazhuang,Hebei 050035,China;Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;State Key Laboratory of Mechanical Behavior and System Safety of Traffic Engineering Structures,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China;China State Railway Group Co.Ltd,Beijing 100844,China;Key Laboratory of Roads and Railway Engineering Safety Control of Ministry of Education,Shijiazhuang Tiedao University,Shijiazhuang,Hebei 050043,China)
出处
《铁道工程学报》
EI
CSCD
北大核心
2023年第5期64-68,共5页
Journal of Railway Engineering Society
基金
省部共建交通工程结构力学行为与系统安全国家重点实验室开放课题:大跨度斜拉桥精细化模型震后残余位移研究(KF2021-06)
国家重点研发计划项目:陆路交通基础设施韧性提升共性关键技术(2021YFB2600600,2021YFB2600605)
河北省重点研发计划项目:多灾害作用下城市全装配式高架桥梁灾变机理和韧性提升的关键技术(21375402D)
关键词
大跨度斜拉桥
地震作用
碰撞效应
质量比
周期比
主引桥间距
long-span cable-stayed bridge
seismic action
collision effect
mass ratio
period ratio
main approach bridge spacing
作者简介
张培,1983年出生,女,讲师。
