面向健康诊断的混凝土斜拉桥模型设计与分析  

Design and analysis for health-diagnosis-oriented test model of cable-stayed bridge

作　　者：张国刚[1] 方志[1] 唐盛华[1] 陈素君[1] 陈峰[2] 

机构地区：[1]湖南大学土木工程学院,长沙410082 [2]惠州市公用事业管理局,广东惠州516001

出　　处：《中国工程科学》2012年第11期49-56,共8页Strategic Study of CAE

基　　金：国家自然科学基金项目(51078134)

摘　　要：以广东惠州合生大桥为原型,基于相似理论面向健康诊断设计制作了1∶15的大比例混凝土斜拉桥模型,分析了模型设计中的问题及解决办法。建立了原型桥和模型桥的初始有限元模型(FEM),以实测数据对其进行修正,得到了符合实际的基准有限元模型,采用基准有限元模型对模型桥和原型桥的静动力特性及损伤状态下的损伤特性进行了计算和相似性分析。结果表明,模型设计中进行了各种简化和处理后,模型桥与原型桥的静动力性能及损伤状态下的损伤特性仍具有良好的相似性,采用该模型桥进行损伤识别试验研究能够较好地反映实际,为混凝土斜拉桥模型设计提供参考。Taking the Hesheng Bridge as the prototype,a health-diagnosis-oriented concrete cable-stayed model bridge was designed and made with a scale of 1∶15 based on similarity theory,problems and solutions were analyzed in model design process.The initial finite element model（FEM） of prototype and model bridge were established and the baseline FEM were computed after model updating.The static and dynamic characteristic similarity of the model and prototype bridge was analyzed at undamaged and damage states.The results show that after a variety of simplifications and treatments,the static and dynamic characteristic and damage characteristic of model and prototype bridge still have a good similarity.The method can provide a reference for the model design of concrete cable-stayed bridge.

关 键 词：混凝土斜拉桥 模型设计 模型修正 损伤诊断 

分 类 号：TU317.1[建筑科学—结构工程]