耐震时程法在大跨连续刚构桥纵向抗震性能评估中的应用  

Longitudinal seismic performance of long-span continuous rigid frame bridge using endurance time analysis

作　　者：黄佳栋 谭平[1,2] 张云 周福霖[1,2] HUANG Jia-dong;TAN Ping;ZHANG Yun;ZHOU Fu-lin(School of Civil Engineering,Guangzhou University,Guangzhou 510006,China;Key Laboratory of Earthquake Resistance Earthquake Mitigation and Structural Safety Ministry of Education,Guangzhou University,Guangzhou 510006,China;Guangzhou Municipal Engineering Group Co.,Ltd.,Guangzhou 510060,China;Guangxi Beitou Highway Construction and Investment Group Co.,Ltd.,Nanning 530029,China)

机构地区：[1]广州大学土木工程学院,广东广州510006 [2]广州大学工程抗震减震与结构安全教育部重点实验室,广东广州510006 [3]广州市市政集团有限公司,广东广州510060 [4]广西北投公路建设投资集团有限公司,广西南宁530029

出　　处：《振动工程学报》2024年第2期306-317,共12页Journal of Vibration Engineering

基　　金：国家重点研发计划项目(2019YFE0112500);国家自然科学基金资助项目(51978185)。

摘　　要：采用简化方法对大跨连续刚构桥的抗震性能进行高效和准确的评估,在该类桥梁的设计和加固改造时是非常必要的。耐震时程法作为一种评估桥梁抗震性能的简化方法,只需要一次时程分析就可以实现桥梁从完好到倒塌的全过程分析。为研究耐震时程法在评估大跨连续刚构桥纵向抗震性能的适用性与精确性,本文以一座大跨波形钢腹板连续刚构桥为研究对象,基于中国公路桥梁抗震设计规范设计反应谱,生成3条耐震加速度时程曲线作为地震输入,同时选择16条天然地震动进行增量动力分析,对比研究了该连续刚构桥地震响应特征。研究结果表明:耐震时程分析结果处于增量动力分析结果的包络线之内,耐震时程法中位值与增量动力分析结果的均值曲线吻合较好,因此,耐震时程分析方法可以作为大跨连续刚构桥抗震性能评估的一种高效率方法。An efficient and accurate evaluation of the seismic performance of long-span continuous rigid frame bridges using a sim⁃plified method is essential in the design and strengthening of such bridges.As a simplified method to evaluate the seismic perfor⁃mance of bridges,the endurance time method can be used to simulate the whole process of bridge from intact to collapse with non⁃linear time history analysis only once.In order to study the applicability and accuracy of the endurance time method in evaluating the longitudinal seismic performance of continuous rigid frame,this paper investigated a long-span continuous rigid frame bridge with corrugated steel webs.Three acceleration time-history curves were generated based on the design response spectrum of China highway bridge seismic code.In addition,16 natural ground motions were selected for incremental dynamic analysis.The seismic response characteristics of continuous rigid frame with corrugated steel webs were compared and studied.The seismic response characteristics of continuous rigid frame with corrugated steel webs were comparatively studied by endurance time analysis method and incremental dynamic analysis.Research results demonstrate that the endurance time analysis method results are within the enve⁃lope of the incremental dynamic analysis results.The time-history analysis results are within the envelope of the incremental dynam⁃ic analysis results.The median value of the endurance time analysis method has an allowable error with the mean curve of incremen⁃tal dynamic analysis.Therefore,Endurance time analysis method can be used to evaluate seismic performance of the long-span con⁃tinuous rigid frame bridge.

关 键 词：连续刚构桥 抗震性能 耐震时程法 IDA法 

分 类 号：U448.23[建筑科学—桥梁与隧道工程]