自锚式悬索桥施工过程中索力变化规律的试验研究  

Experimental Research on Cable Force Evolution in Construction Process of Self-anchored Suspension Bridge

作　　者：闫维明[1] 于浩[1] 陈彦江[1] 王凯[1] 郝朝伟 

机构地区：[1]北京工业大学工程抗震与结构诊治北京市重点实验室,北京100124

出　　处：《公路交通科技》2015年第11期55-60,67,共7页Journal of Highway and Transportation Research and Development

基　　金：国家自然科学基金项目(51378037)

摘　　要：以北京密云云蒙大桥为依托,进行了1/20全桥缩尺模型试验。通过对两套不同张拉方案下得到的试验数据进行对比分析,揭示了自锚式悬索桥在两轮张拉程序下吊索索力的变化规律,指出吊索索力的相干性与体系转换状态有关,研究了索鞍顶推过程对吊索索力的影响,指出索鞍顶推将导致主缆被绷紧的一侧吊索力全面上升,主缆被放松的一侧吊索力全面下降,阐述了无应力状态法的基本理论,并通过分析成桥索力的实现情况,验证了在自锚式悬索桥施工过程中应用无应力状态法进行施工控制的合理性。Based on the Yunmeng Bridge in Miyun county of Beijing,a 1 /20 total bridge scale model test is conducted. By comparative analyzing the test data from 2 tensioning schemes, the evolution regularity of cable force of self-anchored suspension bridge under twice tensioning process is revealed. It indicates that the relevance of cable force is related to structural system transformation. The influence of cable saddle incremental launching on cable force is studied. It indicates that the cable saddle incremental launching will result in cable force on the side of strained main cable overall rise and the cable force on the side of relaxed main cable overall reduce. The unstressed state control method is expounded and proved to be effective on self-anchored suspension bridge construction by analyzing realization of cable force on finished bridge state.

关 键 词：桥梁工程 自锚式悬索桥 全桥模型试验 索力 施工控制 

分 类 号：U448.25[建筑科学—桥梁与隧道工程] TU317.1[交通运输工程—道路与铁道工程]