损伤状态下悬索桥静动态响应的模型试验研究  

Model Test of Static and Dynamic Responses of Suspension Bridge under Damage Condition

作　　者：孙宗光[1] 栗燕娜[2] 石健[3] 伍雪南[1] 

机构地区：[1]大连海事大学道路与桥梁工程研究所,辽宁大连116026 [2]天津市海顺交通工程设计有限公司,天津300074 [3]辽宁省交通科学研究院,辽宁沈阳110015

出　　处：《公路交通科技》2009年第4期59-63,共5页Journal of Highway and Transportation Research and Development

基　　金：教育部留学回国科研启动基金资助项目(JYB-04-1);辽宁省自然科学基金资助项目(20022004)

摘　　要：面向健康诊断,设计制作了悬索桥结构整体试验模型。利用该模型,对悬索桥进行了加劲梁、主缆、吊索等基本构件的损伤状态模型试验研究。分析了损伤状态下,加劲梁挠度与应变、主缆应变、吊索应变、固有频率的变化规律。悬索桥结构各种响应对加劲梁损伤的敏感性很低,对加劲梁损伤位置的相关性也不明显。主缆损伤引起的悬索桥结构静动态响应变化最为明显,并且响应的变化对损伤位置和损伤程度都呈现良好的相关性。吊索损伤导致的悬索桥结构响应变化对损伤位置和损伤程度亦呈现良好的相关性,但导致的加劲梁挠度和应变变化幅度很小。For health-oriented diagnosis,a suspension bridge model was designed and manufactured.Based on the model,model test for girder,main cable and hangers of suspension bridge under damage condition was conducted.The variations of the structural response and characteristics(deflection and strain of stiffened girder,strains of main cable and hangers,and the natural frequencies) under damage condition were analyzed.The results show that(1) the sensitivity of the structural responses to girder damage is rather low and the correlation of the responses variations to damage location is also unconspicuous;(2) the static and dynamic structural response variations induced by main cable damage are remarkable and the variations give a good indication of correlation to both damage location and damage extent;(3)the responses variations induced by hanger damage also give a good indication of correlation to both damage location and damage extent,but the variations of deflection and strain of stiffened girder are comparatively small.

关 键 词：桥梁工程 静动态响应 模型试验 悬索桥 损伤 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]