齐鲁大桥索梁锚固构造的设计与分析  

Design and Analysis of Cable-Girder Anchorage Structure for Qilu Bridge

作　　者：陈龙 魏明光 陈亮 颜海 CHEN Long;WEI Ming-guang;CHEN liang;YAN Hai(Shanghai Municipal Engineering Design Institute(Group)Co.Ltd.,Shanghai 200092,China)

机构地区：[1]上海市政工程设计研究总院(集团)有限公司,上海市200092

出　　处：《公路》2020年第11期104-109,共6页Highway

基　　金：上海市科技人才计划项目,项目编号16XD1422600。

摘　　要：以主跨420m的网状吊杆组合梁拱桥山东齐鲁大桥为背景,从整体受力、局部构造和施工偏差的角度,对一种新型的锚拉板式偏心索梁锚固构造进行了有限元分析研究。分析结果表明,该构造可以满足网状吊杆的交叉锚固需求;可适当减小索导管承压端的自由长度,以缓解应力集中的情况;不同半径的圆弧倒角对锚拉板局部区域的受力影响不显著,可考虑采用U形倒角或局部绕焊等形式;齐鲁大桥的锚拉板构造对吊杆力荷载的偏角较为敏感,应充分考虑不同倾角工况下结构的响应。Taking the Qilu Bridge in Shandong Province as the background,which is a composite girder arch structure with reticulated suspenders and the main span length being 420m,studies are carried out by means of finite element analysis for a new type of eccentric cable-beam anchorage structure with anchor-tension plate from the point of view of overall force,local structure and construction deviation.The results show that:this structure can satisfy the cross anchorage requirement of the reticulated suspenders;the free length of the cable duct can be appropriately reduced to alleviate the stress concentration;the influence of arc chamfer with different radius on the local stress of anchor plate is not significant,while U-shaped chamfer or local circumferential welding may achieve a better result;and the anchor plate of Qilu Bridge is sensitive to the deflection angle of suspender load,and the response of structure under different inclination conditions should be fully considered.

关 键 词：网状吊杆拱桥 偏心索梁 锚固构造 有限元法 锚拉板 结构分析 

分 类 号：U442.52[建筑科学—桥梁与隧道工程]