大跨度斜拉钢管拱桥的温度效应分析  

Analysis of Temperature Influence on Large-span Cable-stayed Steel Tube Arch Bridge

作　　者：彭敏[1] 钟新谷[1] 舒小娟[1] 

机构地区：[1]湖南科技大学,湖南湘潭411201

出　　处：《施工技术》2008年第3期88-90,95,共4页Construction Technology

摘　　要：以湘潭四大桥为工程背景,根据拱桥在日照温差作用下的大量实测数据,研究钢管拱在日照温差作用下的线形、应力及索力的变化规律,并提出了在施工控制中,主拱吊装的线形变化考虑温度影响的经验修正方法。合拢前拱脚处临时铰封铰前后及合拢前后体系的转换在日照温差影响下的对比表明,考虑日照温差影响经过修正后的实测坐标与理论值非常接近,揭示了斜拉钢管拱桥在日照温差影响下引起变化的规律。Based on observation results for Xiangtan Fourth Bridge in sunshine, change laws of steel tube arch alignment, stress and cable tension were analyzed. And the experience revision method according to alignment change of the main arch considering temperature influence was put forward during construction control. Sunshine temperature influences were compared both between before and after temporary hinge sealing at arch foot and between system change before and after closure. Comparison result shows that the actual coordinates approach to the theoretical test values when temperature influence is considered. It shows change laws of cablestayed steel tube arch bridge caused by sunshine temperature influence.

关 键 词：斜拉拱桥 温度效应 施工控制 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]