兰州市柴家峡黄河特大桥总体设计  

Design of Large-span Cable-stayed Main Bridge for the Chaijiaxia Yellow River Bridge

作　　者：吴勇 WU Yong

机构地区：[1]上海市城市建设设计研究总院(集团)有限公司,上海200125

出　　处：《上海公路》2024年第3期34-39,M0004,共7页Shanghai Highways

摘　　要：兰州柴家峡黄河大桥主桥采用主跨为364 m的双塔双索面六跨连续钢梁大跨度斜拉桥的设计方案,主桥南、北两个主塔采用了不同的高度,且南侧边跨、次边跨以及部分主跨位于平曲线上,增加了主桥结构设计的难度。现简要地介绍了主桥结构的设计;针对主桥结构设计的难点,着重介绍了主桥结构总体分析中的斜拉索成桥目标索力以及支座反力的确定,并详细介绍了主桥的减隔震设计及其效应分析。为满足主桥结构整体受力以及抗震的需要,在设计中引入了三角形钢阻尼器与熔断型限位装置,值得类似桥梁结构设计借鉴。The main bridge of the Chaijiaxia Yellow River bridge features the design scheme of large-span cable-stayed bridge with a six-span continuous steel girder and a main span of 364 m.The south and north main pylons of the main bridge are of different heights,and the south side span,second side span and part of main span are located on a horizontal curve,which makes the structural design more challenging.This paper briefly introduces the design of the main bridge structure.To address the challenges in the design,the determination of target stayed cable forces at completed bridge state and support reactions in the global structural analysis was introduced.It also details the seismic isolation design and its effect analysis.In order to meet the requirements for overall structural capacity and seismic resistance,triangular steel dampers and fuse-type limiting devices were incorporated into the design,providing valuable references for similar bridge structure designs.

关 键 词：大跨度斜拉桥 高低主塔 结构总体分析 斜拉索成桥目标索力 减隔震设计 

分 类 号：U442.5[建筑科学—桥梁与隧道工程]