自锚式悬索桥主缆成桥线形分析  

Analysis of finished main cable shape of self-anchored suspension bridges

作　　者：肖海波[1] 俞亚南[1] 高庆丰[1] 

机构地区：[1]浙江大学土木工程学系,浙江杭州310027

出　　处：《浙江大学学报（工学版）》2004年第11期1470-1473,共4页Journal of Zhejiang University：Engineering Science

摘　　要：基于悬链线解析模型,将加劲梁简化为刚性支承连续梁,根据悬链线索元的节点力与索单元投影的函数关系式,建立了自锚式悬索桥的分析模型.利用几何线形误差影响矩阵调整索端力,给出了求解主缆成桥线形和主缆无应力长度的非线形迭代方法.与有限元分析方法相比,该方法计算过程简单,精度满足成桥几何线形的设计要求,便于工程应用.算例分析表明,该方法计算结果与有限元方法计算结果具有较好的一致性.Based on the analytical model of catenary, the analysis model of self-anchored suspension bridge was set up for iteratively calculation of the main cable shape and the unstressed length of the main cable, by simplifying stiffening girder to rigid support continuous girder and utilizing the function between the element projections and the cable force components at the catenary element ends. The analysis model guarantees the structure alignment to meet the design require. Compared to the finite-element method, the method discussed simplifies the calculation greatly, and is convenient and accurate for project application. Numerical examples show that the results obtained by this model is consistent with those obtained by finite-element method.

关 键 词：刚性支承连续梁 悬链线索元 自锚式悬索桥 主缆 无应力长度 

分 类 号：U442[建筑科学—桥梁与隧道工程]