独塔自锚式悬索桥恒载状态下结构线形及内力分析  

Analysis of the geometry and inner force for self-anchored suspension bridge with single-tower under dead load

作　　者：朱仲毅[1] 

机构地区：[1]中南大学土木建筑学院

出　　处：《铁道科学与工程学报》2005年第2期46-50,共5页Journal of Railway Science and Engineering

基　　金：国家自然科学基金重大项目(59895410)

摘　　要：基于UL列式的虚功增量方程,根据索的物理及几何特性,推导出了适用于悬索桥缆索几何非线性分析的两节点悬链线索单元。在此基础上,提出了一种确定自锚式悬索桥恒载状态下的结构线形及内力的迭代算法。并以佛山市平胜大桥独塔自锚式悬索桥(主跨350m)为例,对其拟定的两种施工方案分别进行了恒载状态下的结构线形及内力的计算。通过分析比较,对施工方案的可行性进行了论证。Based on the virtual work increment equation of Updated Lagrangian formulation and physics and geometry characteristics of cable, two-node catenary cable element for the geometrical non-linear analysis of suspension bridge's main cable is developed. Furthermore, a fine iterative method of calculating the geometry and inner force of self-anchored suspension bridge with single tower under dead load is investigated. Taking Pingsheng bridge in the city of Foshan which is a single-tower self-anchored suspension bridge and which's main span is 350 m for example, the geometry and inner force under dead load of two construction methods is calculated. By comparison and analysis, the feasibilities of construction methods are demonstrated.

关 键 词：自锚式悬索桥 内力分析 线形 结构 状态 恒载 独塔 几何非线性分析 悬链线索单元 施工方案 增量方程 UL列式 几何特性 迭代算法 分析比较 佛山市 缆索 主跨 大桥 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] U448.22[交通运输工程—道路与铁道工程]