六塔公铁两用斜拉桥钢桁梁温度场的长期监测与分析  

Long-term Monitoring and Analysis of Temperature Field in Steel Truss Girder of Rail-cum-Road Cable-stayed Bridge with Six Towers

作　　者：王蔓亚 丁幼亮[1,2] 赵瀚玮 岳青 吴来义 WANG Manya DING Youliang ZHAO Hanwei YUE Qing WU Laiyi(Key Laboratory of Concrete and Prestressed Concrete Structures of Ministry of Education,Southeast University,Nanjing Jiangsu 210096, China Key Laboratory for Health Monitoring and Control of Large Structures, Shijiazhuang Hebei 050043, China China Railway Major Bridge（Nanjing） Bridge and Tunnel Inspect ＆ Retrofit Co.,Ltd., Nanjing Jiangsu 210032 ,China)

机构地区：[1]东南大学混凝土及预应力混凝土结构教育部重点实验室,江苏南京210096 [2]河北省大型结构健康诊断与控制实验室,河北石家庄050043 [3]中铁大桥(南京)桥隧诊治有限公司,江苏南京210032

出　　处：《铁道建筑》2016年第12期5-8,共4页Railway Engineering

基　　金：国家重点基础研究发展计划(973计划)(2015CB060000);河北省大型结构健康诊断与控制重点实验室开放课题(201502);中国铁路总公司科技研究开发计划(2014G004-B)

摘　　要：基于郑州黄河公铁两用桥连续钢桁梁温度场的长期监测数据,利用极值分析方法对结构竖向、纵向、横向温差以及关键构件截面的内部温差进行了计算和分析,得到六塔公铁两用斜拉桥钢桁梁的温差分布特性。研究结果表明:部分结构温差如边桁与中桁构件间温差、边桁下弦杆箱形截面温差超过10℃,甚至高达21.92℃,明显超过最大温差设计值;结构整体竖向温差和部分截面温差最高达7℃。建议在此类桥梁结构设计时充分考虑温度效应。Based on the long-term monitoring data of temperature field in steel truss girder of Zhengzhou YellowRiver rail-cum-road bridge,the vertical,longitudinal,transverse temperature difference and internal temperature difference in key sections of structure were calculated and analyzed by using extreme value analysis method.Then the temperature difference distribution in rail-cum-road cable-stayed bridge with six towers was concluded.The results showthat part of the structural temperature differences like the one between side girder and middle girder and box section temperature difference in side girder bottom chord are more than 10 ℃ and even up to 21.92 ℃,which are obvious higher than the design value.Structural vertical temperature difference and some member-sectional temperature differences are up to 7 ℃.It is suggested that the temperature effect should be fully considered in the design of this kind of bridge structure.

关 键 词：钢桁梁桥 温度场 极值分析 温差分布特性 结构健康监测 

分 类 号：U448.121[建筑科学—桥梁与隧道工程]