支座变形对超长多跨连续梁桥温度变形的影响  

Bearing Deformation Effect on the Temperature Deformation of Super-long and Multi-span Continuous Beam Bridge

作　　者：吴煜哲 李长辉[2] WU Yuzhe LI Changhui(School of Civil Engineering, TCU, Tianjin 300384, China College of Civil Engineering, Tianjin University, Tianjin 300072, China)

机构地区：[1]天津城建大学土木工程学院,天津300384 [2]天津大学建筑工程学院,天津300072

出　　处：《天津城建大学学报》2017年第1期17-22,65,共7页Journal of Tianjin Chengjian University

基　　金：住建部科学技术项目(2015-K3-021)

摘　　要：考虑支座变形对超长多跨连续梁桥温度变形的影响,以津保铁路引入天津西站工程子牙河特大桥为例,利用能量法推导出温度和梁体纵向变形之间的关系式.通过理论推导得出,可以利用支座影响系数K值的变化来反映支座变形对超长多跨连续梁桥温度变形影响程度的大小.通过分析发现在计算桥梁温度变形时考虑支座影响系数K的影响可以提高计算的精度,使计算结果更符合实际情况.本文同时分析了支座影响系数K值的大小与支座中聚四氟乙烯板和钢板之间的摩擦系数以及不同温度差之间的关系.Considering the influence of bearing deformation on the temperature deformation of super-long and multi-span continuous girder bridge and taking Ziyahe River Grand Bridge as an example,the paper derived the relational expression between the temperature and the longitudinal deformation of the beam by the energy method. Through the theory,it could be derived that the change of bearing influence coefficient K value could reflect the deformation rate of the super-long and multi- span continuous beam bridge. Through the analysis, it was found that considering the influence of the bearing influence coefficient K could improve the accuracy of calculation and make the calculation closer to the actual situation when calculating the temperature deformation of the bridge. This paper also analyzed the relationship between the friction coefficient and the different temperature difference between the K value of the bearing influence coefficient and the base plate.

关 键 词：超长多跨连续梁桥 支座变形 温度变形 能量法 支座影响系数K 

分 类 号：U448.215[建筑科学—桥梁与隧道工程]