摘要
主缆无应力长度和空缆架设线形是大跨度悬索桥主缆线形控制的2个关键点.文中推导了索鞍处主缆无应力长度修正公式和温度修正公式,以及空隙率影响计算公式,采用MathCAD编制了主缆分析程序,分析了主缆弹性模量、截面面积、索股自重等因素对无应力长度的影响,研究了弹性模量、温度、空隙率对空缆状态和索鞍预偏量的影响.
Unstressed length of the main cable and the empty shape of the main erection are two key points of the main cable shape control of long-span suspension bridge. This article derives the correc- tion formula of the cable saddle unstressed length of the main cable and rhe temperature and the for- mula about the influence of the porosity, and uses MathCAD prepares the main cable analysis proce- dure to analyze influence of the main cable modulus of elasticity, cross-sectional area, weight, etc im- pacts for the unstressed length, and studies the influence of elastic modulus, temperature and porosity for the cable status and pre-displacement of cable saddle.
出处
《武汉理工大学学报（交通科学与工程版）》
2015年第4期888-891,共4页
Journal of Wuhan University of Technology（Transportation Science & Engineering）
基金
浙江省交通科技项目(批准号:2013H29-2)
国家自然科学青年基金项目(批准号:51308055)资助
关键词
悬索桥
影响参数
无应力长度
跨中标高
预偏量
suspension bridge
affecting factors
non stress length
cross elevation during the pre dis- placement
