超宽现浇混凝土连续箱梁横梁设计  

Design of Wide Municipal Cast-in-place Concrete Box-girder Crossbeam

作　　者：唐国喜[1,2] 胡胜来 TANG Guo-xi;HU Sheng-lai(Anhui Transport Consulting&Design Institute Co.,Ltd.,Hefei,Anhui 230088,China;Road traffic energy saving and environmental protection technology transportation industry R&D center,Hefei,Anhui 230088,China)

机构地区：[1]安徽省交通规划设计研究总院股份有限公司,安徽合肥230000 [2]公路交通节能环保技术交通运输行业研发中心,安徽合肥230000

出　　处：《黑龙江交通科技》2021年第2期80-83,86,共5页Communications Science and Technology Heilongjiang

摘　　要：市政高架桥梁项目中,现浇混凝土宽箱梁同一联桥内的横梁尺寸、支座横向布置都可能存在较大的差异,横梁设计已经成为设计工作中的主要部分。纵向荷载在横梁横向上的分配是横梁计算的关键,结合现行常用的横向计算方法,采用均布等效腹板剪力法对鱼腹式大悬臂混凝土连续箱梁的横梁进行计算及设计,横梁悬臂端部预应力锚端附近单元按普通钢筋混凝土构件验算其裂缝宽度,其余部分按预应力A类(A类)构件进行设计,构件各项验算结果均满足相关规范要求。In the municipal viaduct project,there may be great differences in crossbeam size and support transverse arrangement in the same joint cast in situ concrete wide box girder bridge,and the design of the crossbeam has become the main part of the design work.The distribution of longitudinal load in the transverse direction of the crossbeam is the key to the calculation of the beam.Combined with the current common transverse calculation method,the method of uniformly distributed equivalent web shear is used to calculate and design the crossbeam of cast-in-place super wide fish belly large cantilever concrete continuous box girder.The crack width of the unit near the anchorage end of the cantilever end of the beam is checked according to the ordinary reinforced concrete component,and the other positions are designed as prestressed class A(Class A)members。All checking results of the component meet the specification requirements.

关 键 词：现浇箱梁 横梁 结构设计 横向计算方法 

分 类 号：U442[建筑科学—桥梁与隧道工程]