近断层强震作用下城市组合钢板梁桥RC桥墩震后可修复性研究

扫码查看

原文链接

万方数据
维普

中文摘要：为研究近断层地震动作用下城市组合钢板梁桥钢筋混凝土(Reinforced Concrete,RC)桥墩的震后可修复性,以8度区、Ⅲ类场地的城市组合钢板梁桥为背景,分析在E2水平近断层地震动作用下RC桥墩的残余位移比.采用正交试验设计方法,按现行规范试设计25座典型三跨连续城市组合钢板梁桥样本,采用验证后的有限元建模方法建立全桥动力模型,分析跨径、桥宽和桥墩长细比对RC桥墩残余位移比的影响.并以样本中某3×35 m三跨连续组合钢板梁桥为研究对象,进行有限元模型参数分析,研究RC桥墩设计参数(轴压比、长细比、纵筋配筋率和体积配箍率)对残余位移比的影响.结果表明:组合钢板梁桥跨径、桥宽和桥墩长细比均对RC桥墩残余位移比有明显影响;RC桥墩残余位移比与轴压比和长细比成正比关系,而与纵筋配筋率和箍筋体积配箍率成反比关系;为提高城市组合钢板梁桥在近断层地震动作用下桥墩的可修复性,建议RC桥墩轴压比不超过10％,长细比不超过8,纵筋配筋率取1.5％～2.0％,箍筋体积配箍率取0.6％～1.2％.

外文标题：Research on Post-Earthquake Reparability of Urban Bridges Consisting of Composite Steel Ⅰ Girders and Concrete Panels under Near-Fault Strong Ground Motions

外文摘要：Taking the urban bridges that consist of composite steel Ⅰ girders and concrete panels in the region of Class Ⅲ terrain and with the risk of 8-magnitude earthquakes as cases,the post-earthquake reparability of the reinforced concrete(RC)piers of such bridges under near-fault ground motions is studied.The residual displacement ratio of the RC pier under near-fault ground motions equating the forces of E2 earthquakes is analyzed.In accordance with the orthogonal test design method,25 specimens of typical urban bridges with three continuous spans of composite steel Ⅰ girders and concrete panels were prepared consulting the current specifications.A verified finite element model of one specimen with three equal continuous spans of 35 m was built up to analyze the influences of span length,bridge width and slenderness ratio on the residual displacement ratio of RC pier.An existing three-span bridge of such type was numerically simulated to study the influences of the design parameters of RC piers on the residual displacement ratio,including the axial compression ratio,slenderness ratio,longitudinal reinforcement ratio and volumetric stirrup ratio.It is shown that the residual displacement ratio of the RC pier is significantly associated with the span length,bridge width and its slenderness ratio,which is proportional to the axial compression ratio and the slenderness ratio,but inversely proportional to longitudinal reinforcement ratio and volumetric stirrup ratio.It is recommended to set the axial compression ratio of the RC pier less than 10％,slenderness ratio less than 8,longitudinal reinforcement ratio between 1.5％and 2.0％,and the volumetric stirrup ratio between 0.6％and 1.2％,to improve the seismic resilience of the urban bridges with composite steel Ⅰ girders and concrete panels under near-fault ground motions.

外文关键词：

urban bridgebridge with composite steel Ⅰ girders and concrete panelsRC pierseismic performancereparabilityresidual displacement ratiodesign parameterfinite element method

作者：

林志滔

展开 >

作者单位：

福州市规划设计研究院集团有限公司,福建福州 350108

关键词：

城市桥梁组合钢板梁桥 RC桥墩抗震性可修复性残余位移比设计参数有限元法

基金：

福建省自然科学基金福州市市政建设开发有限公司科技项目福建省高等学校产学合作项目Science and Technology Project of Fuzhou M unicipal Construction and Development Co Ltd

项目编号：

2020J1477榕市建-20190987号2019Y4003Fuzhou Municipal Construction 20190987

出版年：

2024

DOI：

10.20052/j.issn.1671-7767.2024.02.014

世界桥梁

中铁大桥局集团有限公司

世界桥梁

CSTPCD北大核心

影响因子：0.928

ISSN：1671-7767

年,卷(期)：2024.52(2)

参考文献量18