大跨度悬索桥主索鞍设计  

Design of Main Cable Saddle for Long Span Suspension Bridge

作　　者：尹开川 袁警 黄永福 俞平桥 邹惠琼 朱忠 YIN Kai-chuan;YUAN Jing;HUANG Yong-fu;YU Ping-qiao;ZOU Hui-qiong;ZHU Zhong(Yunnan Institute of Transportation Planning and Design,Kunming 650011,China)

机构地区：[1]云南省交通规划设计研究院有限公司,昆明650011

出　　处：《价值工程》2023年第9期64-66,共3页Value Engineering

基　　金：高烈度地震近场区大跨桥梁建造及防灾减灾关键技术研究(云交科教便[2020]126号)。

摘　　要：根据《公路悬索桥设计规范》(JTG/T D65-05-2015),当承缆槽宽度大于700mm时,主索鞍宜按双纵肋设计。本项目为主跨920m的双塔单跨钢箱梁悬索桥,根据主缆索股排列,本桥承缆槽宽度为775mm,与规范值接近。本文针对单纵肋和双纵肋主索鞍的结构形式、受力特点及制造工艺,拟定主索鞍构造,并进行精细化有限元计算分析,对比两种形式索鞍的内力状态,为今后类似桥梁主索鞍的设计提供借鉴。According to the Specification for Design of Highway Suspension Bridge(JTG/T D65-05-2015),when the width of the saddle groove is greater than 700mm,the main cable saddle should be designed as double longitudinal ribs.This paper discussed a double-pylon and single-span steel box girder suspension bridge with a main span of 920m.According to the arrangement of main cable strands,the width of the saddle groove of the bridge was 775mm,which was close to the value given by the specification.In this paper,considering the structural form,mechanical characteristics and manufacturing process of main cable saddles with single longitudinal rib and double longitudinal ribs,detailed structure of main cable saddles were proposed,and refined finite element calculation and analysis were carried out to compare the internal force states of the two types of saddle,so as to provide reference for the design of similar bridge main cable saddles in the future.

关 键 词：主索鞍 构造形式 单纵肋 双纵肋 计算分析 

分 类 号：U448.25[建筑科学—桥梁与隧道工程]