大跨度悬索桥温度变形监测与分析  

Monitoring and analysis of thermal deformation in long-span suspension bridges

作　　者：周毅 陈波[4] 夏勇[5] ZHOU Yi;CHEN Bo;XIA Yong(School of Civil and Resource Engineering,University of Science and Technology Beijing,Beijing 100083,China;Research Institute of Urbanization and Urban Safety,University of Science and Technology Beijing,Beijing 100083,China;Shunde Graduate School,University of Science and Technology Beijing,Foshan 528399,Guangdong China;Hubei Province Key Laboratory of Roadway Bridge and Structural Engineering,Wuhan University of Technology,Wuhan 430070,China;Department of Civil and Environmental Engineering,The Hong Kong Polytechnic University,Hong Kong 999077,China)

机构地区：[1]北京科技大学土木与资源工程学院,北京100083 [2]北京科技大学城镇化与城市安全研究院,北京100083 [3]北京科技大学顺德研究生院,广东佛山528399 [4]武汉理工大学道路桥梁与结构工程湖北省重点实验室,湖北武汉430070 [5]香港理工大学土木及环境工程学系,中国香港999077

出　　处：《华中科技大学学报（自然科学版）》2022年第8期117-123,共7页Journal of Huazhong University of Science and Technology(Natural Science Edition)

基　　金：国家自然科学基金资助项目(51978549);佛山市科技创新专项资金资助项目(BK20BE008,BK21BE014)。

摘　　要：以香港青马大桥为例,通过现场监测、有限元分析、理论推导,系统研究了悬索桥的温度分布特征和温度变形规律.研究表明:大跨度悬索桥的温度时空变化可由传热有限元分析得到;当温度升高时,悬索桥中跨跨中桥面下降,桥塔向中跨聚拢;主缆温度变化是控制主梁跨中竖向位移和桥塔塔顶水平位移的主要因素.揭示了大跨度悬索桥在运营期间的温度变形规律,并提供了温度变形的简便计算公式.Taking the Tsing Ma Bridge in Hong Kong as an example,the characteristics of the temperature distribution and the patterns of the temperature-induced deformation of suspension bridges were systematically investigated via field measurement,numerical simulation, and theoretical analysis. The temporal and spatial variation in structural temperature of suspension bridges can be well reproduced by heat transfer finite element analysis. As temperature increases, the mid-span of the main-span deck moves downwards while both towers deflect towards the central span.Both the girder mid-span vertical displacement and the towertop horizontal movement are dominated by the main cable temperature changes. In-depth insights into the temperature-related behaviors of long-span suspension bridges during operation were provided and easy-to-use formulas to estimate the thermal deformations were offered.

关 键 词：悬索桥 温度分布 变形 监测 传热分析 理论公式 

分 类 号：TU31[建筑科学—结构工程]