温度作用下斜拉-悬索协作体系桥静力分析  

Static Analysis of Cable-Stayed Suspension Bridge under Thermal Effects

作　　者：石磊[1] 夏国平[1,2] 苗峰[1,3] 

机构地区：[1]大连理工大学桥梁工程研究所,辽宁大连116024 [2]宁夏大学土木与水利工程学院,宁夏银川750021 [3]大连大学建筑工程学院,辽宁大连116622

出　　处：《沈阳建筑大学学报（自然科学版）》2010年第3期485-491,共7页Journal of Shenyang Jianzhu University：Natural Science

基　　金：交通部西部交通建设科技项目(200631882350)

摘　　要：目的研究斜拉—悬索协作体系桥温度作用下的静力行为,找出温度效应对其的影响规律.方法利用有限元软件ANSYS对金州海湾大桥建立了平面分析模型,分别考虑了体系温差、索梁塔温差、索塔日照、索梁日照4方面的影响,进行了成桥后的温度效应分析,并对比了自锚式和地锚式两种体系的结果.结果体系温差和索梁塔日照对两种体系内力和位移的影响较大,对主梁位移影响最大是索梁塔温差,对主塔位移和弯矩影响最大的则是体系温差.结论温度效应对斜拉—悬索协作体系桥的位移和内力均有一定的影响,在设计中成为不可忽略的因素.In the design of cable-stayed suspension bridge,the effect of thermal stress should be considered.In order to research the static action of cable-stayed suspension bridge,the plane model of Jinzhou Bay Bridge is analyzed under thermal effects by using general FEM software-ANSYS.Meanwhile,temperature difference in system,in deck and in cable-beam-tower,sunlight on cable and tower are considered respective-ly.The discrepancy in both self-anchored and earth-anchored has been compared in details,in addition,the causes of these differences between the two patterns of bridges are analyzed too.The results indicate that temperature in system and sunlight on cable-beam-tower play great influences on internal forces and displacement for both two patterns,in particularly,the most influential displacement of beam is the temperature difference of cable-beam-tower,and the most influence for displacement and moment of tower is the temperature difference in system.In conclusion,thermal effects have some effect on the bridge displacements and internal forces.It is an important factor which can not be ignored in the design.

关 键 词：斜拉—悬索协作体系桥 静力分析 温度作用 温度效应分析 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]