PC斜拉桥施工过程索力敏感性分析  

Sensitivity Analysis of Cable Force in PC Cable-stayed Bridge Construction Process

作　　者：马红健 鄢雷 罗杨 MA Hong-jian;YAN Lei;LUO Yang(The Third Engineering Branch of China Railway First Group Co.,Ltd.,Xi'an 721006,China)

机构地区：[1]中铁一局集团有限公司第三工程分公司,西安721006

出　　处：《价值工程》2021年第7期136-138,共3页Value Engineering

摘　　要：为保证混凝土斜拉桥成桥后的线形和内力满足设计要求,本文以某独塔斜拉桥为研究对象,建立全桥空间杆系模型对施工索力参数进行敏感性分析,研究施工索力变化对成桥状态的主梁内力及主梁线形的影响。结果表明,跨中斜拉索三张索力变化对成桥线形和应力影响最显著,跨中斜拉索是施工控制关键索。分析结果可应用于施工监控,更好的提高施工控制精度。In order to ensure that the linear shape and internal force of concrete cable-stayed bridge after completion meet the design requirements,this paper takes a single-tower cable-stayed bridge as the research object,establishes the whole bridge space model to conduct sensitivity analysis on the cable force parameters of construction,and studies the influence of the variation of construction cable force on the internal force and the linear shape of main girder of completed bridge.The results show that the variation of the three cable forces in the mid-span cable has the most significant effect on the alignment and stress of the bridge,and the mid-span cable is the key cable for construction control.The analysis results can be applied to the construction monitoring,better improve the construction control precision.

关 键 词：斜拉桥 索力敏感性分析 成桥状态 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]