拉杆倾角对斜拉桥桥塔侧向稳定性的影响  

Influence of Rigid Rod Angle on Lateral Stability of Cable-Stayed Bridge Pylon

作　　者：薛江[1] 李自林[1,2] 邢颖[1] 丁宏毅[1] 

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

出　　处：《天津大学学报（自然科学与工程技术版）》2013年第10期901-909,共9页Journal of Tianjin University：Science and Technology

基　　金：国家重点基础研究发展计划(973计划)资助项目(2011CB013603);住房和城乡建设部软科学研究资助项目(2012-K4-28)

摘　　要：针对刚性拉杆斜拉桥拉杆倾角对桥塔侧向稳定性影响的问题,基于能量原理,以单承重面刚性拉杆斜拉桥为研究对象,推导出带有刚性拉杆考虑扭转变形的斜拉桥侧向弹性稳定系数解析计算公式并以算例进行验证,研究了辐射式、竖琴式和扇形3种不同索面类型斜拉桥拉杆倾角对桥塔侧向弹性稳定性的影响.结果表明:拉杆倾角与桥塔侧向稳定性系数存在非线性关系,不同类型索面斜拉杆倾角变化对桥塔稳定性系数'非保向力'效应的影响均是不同的.To overcome the influence of rigid rod angle on the lateral stability of cable-stayed bridge pylon, the ana-lytical formula for the lateral elastic stability coefficient of the cable-stayed bridge was derived with the torsional de-formation of rigid rod considered and then verified by an example. The influence of rigid rod angle on the lateral sta-bility of cable-stayed bridge pylon with three difference types of cable plane, which were radiation-type, harp-type and sector-type cable planes, was investigated. Results show that there exists a nonlinear relationship between rigid rod angle and the lateral buckling coefficient of pylon, and that the change in rigid rod angle of cable plane of different type has a different influence on the lateral stability of cable-stayed bridge pylon and nondirectional force.

关 键 词：斜拉桥 刚性拉杆 非保向力 拉杆倾角 弹性稳定系数 

分 类 号：U441[建筑科学—桥梁与隧道工程] TU311.2[交通运输工程—道路与铁道工程]