V型拱塔斜拉桥状态评估基准有限元模型研究  

Study on Baseline Finite Element Model of V-type Arch Pylon Cable-stayed Bridge Condition Assessment

作　　者：王伟 张玉平[2] WANG Wei;ZHANG Yuping(Chongqing Zhongke Construction Quality Inspection Co.,Ltd.,Chongqing 400080,China;School of Civil Engineering,Changsha University of Science and Technology,Changsha 410114,China)

机构地区：[1]重庆中科建筑工程质量检测有限公司,重庆400080 [2]长沙理工大学土木工程学院,长沙410114

出　　处：《四川轻化工大学学报（自然科学版）》2020年第5期89-95,共7页Journal of Sichuan University of Science & Engineering(Natural Science Edition)

基　　金：国家重点基础研究发展计划(973计划)项目(2015CB057702)。

摘　　要：为研究得到桥梁状态评估的基准有限元模型,首先开展了荷载试验,然后采用模型修正技术,联合运用荷载试验中获得的挠度与频率对V型拱塔斜拉桥进行了模型修正与验证,并利用荷载试验中获得的其他实测参数(如其他工况中的挠度与模态振型)对修正后的有限元模型进行了校验。研究结果表明:修正后的有限元模型各测点挠度与频率的理论值与实测值吻合良好,整体变化规律相同,实测与理论模态振型的相关性较好,修正方法是正确可行的,修正后的有限元模型能够准确真实地反映桥梁结构当前状态下的实际受力情况,可以作为桥梁状态评估的基准有限元模型。In order to study and obtain the baseline finite element model of the bridge condition assessment,firstly,the load tests are carried out,and then the model updating technique is used to update and verify the model of the V-arch cable-stayed bridge combine the deflection and frequency obtained in the load test,and the updated model is calibrated by other measured parameters(such as deflection and mode shapes in other working conditions)obtained in the load tests.The results show that the theoretical deflection and frequency values of each measuring point of the updated model matched well with the measured,and the overall change law is the same,the modal correlation between measured and theoretical modal shapes is good,and the updated method is correct and feasible.The updated model can reveal the actual stress situation of the bridge structure in the current state,and can be used as the baseline finite element model of bridge condition assessment.

关 键 词：斜拉桥 V型拱塔 模型修正 挠度 基准有限元模型 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]