汉北河特大桥钢-混凝土混合连续梁设计  

Design of steel-concrete hybrid continuous beam of Hanbei River Bridge

作　　者：高慰 GAO Wei(China Railway SIYUAN Survey and Design Group Co.,Ltd Wuhan 430063)

机构地区：[1]中铁第四勘察设计院集团有限公司桥梁院,武汉430063

出　　处：《铁道勘测与设计》2022年第2期31-34,共4页Railway Survey and Design

摘　　要：沪渝蓉高速铁路天门汉北河特大桥为(80+160+80)m钢-混凝土混合连续梁,主梁采用129m混凝土梁+62m钢箱梁+129m混凝土梁的形式。混凝土梁中支点处梁高11m,边支点处梁高6.2mo钢箱梁采用单箱单室梁,横隔体系分为桁架式和框架式2种。钢箱梁段顶板上铺设15cm混凝土桥面板,与钢箱梁通过剪力钉连接,并在钢混结合段处断开。计算结果表明:本桥混凝土梁段及钢梁段主梁刚度、徐变、应力指标均满足相关规范要求。The Tianmen Hanbei River Bridge of Shanghai-Chongqing-Chengdu high-speed railway is(80+160+80)m steelconcrete hybrid continuous beam.The superstructure consists of 129 m concrete beam,62 m steel box beam and 129 m concrete beam.The beam height at the intermediate supports of the concrete beam is 11m.And the beam height at the side supports is 6.2m.The steel box girder adopts a single-box single-chamber girder,with two types of diaphragms installed,including the truss diaphragms and frame diaphragms.A 15cm concrete deck slab is laid on the top plate of the steel box girder section,which is connected with the steel box girder through shear nails and disconnected at the steel-concrete composite segment.The calculation results show that the stiffhess,creep and stress indexes of the concrete girder section and the steel girder section of the bridge all meet the requirements of the relevant specifications.

关 键 词：高速铁路桥梁 钢-混凝土混合梁桥 钢混结合段 桥梁设计 

分 类 号：U44[建筑科学—桥梁与隧道工程]