温度效应对斜拉桥拉索张拉过程中索力损失的影响研究  

Research on Influence of Temperature Effect on the Loss of Cable Force During Cable-stayed Bridges Tensioning

作　　者：薛炳贺 Xue Binghe(China Railway 18th Construction Bureau Co.,Ltd.,Survey and Design Instute,Tianjin 300222,China)

机构地区：[1]中铁十八局集团有限公司勘察设计院,天津300222

出　　处：《市政技术》2024年第6期112-117,共6页Journal of Municipal Technology

基　　金：国家自然基金项目(51908178)。

摘　　要：为研究温度效应对斜拉桥拉索张拉过程中索力损失的影响,依托浙江省嵊州市小砩桥工程,采用Midas civil软件建立全桥有限元模型,结合拉索张拉过程中的索力和塔梁位移等实测数据对斜拉桥拉索张拉过程中的索力损失进行了研究,分析了温度对于张拉索力损失的影响机理。研究结果表明,温度效应会导致斜拉桥主塔、主梁、索体三者的变形不协调,进而导致拉索索力的不均匀损失。基于研究结果提出了斜拉桥拉索张拉的适用环境条件建议,为同类型斜拉桥的设计和建造提供了重要参考。In order to investigate the influence of temperature effects on the loss of cable tension during the tensioning process of cable-stayed bridges,a full bridge finite element model was established by Midas civil software based on the Xiaofei Bridge project in Shengzhou,Zhejiang Province.Combined with the measured data of cable force and tower-beam displacement during the cable tensioning process,the loss of tension was studied and the mechanism of temperature on the loss of tension cable force.The results indicated that temperature effects cause deformation discrepancies of the main tower,main beam and cables,and then cause the uneven loss of cable force.Based on these findings,recommendations for suitable environmental conditions for cable tensioning in cable-stayed bridges were proposed,providing important references for the design and construction of similar types of cable-stayed bridges.

关 键 词：斜拉桥 拉索 索力损失 温度效应 

分 类 号：U442.5[建筑科学—桥梁与隧道工程] U448.27[交通运输工程—道路与铁道工程]