城镇农村公路桥梁改造设计  

Reconstruction Design of Rural Highway Bridge in Cities and Towns

作　　者：张倪健 ZHANG Ni-jian(Shanghai Engineering Survey and Design Co.Ltd.,Shanghai 200040,China)

机构地区：[1]上海工程勘察设计有限公司,上海200040

出　　处：《工程建设与设计》2023年第15期129-131,共3页Construction & Design for Engineering

摘　　要：在上海市某桥梁拓宽项目的背景下,采用Midas Civil建立有限元模型,在上部结构的拼宽缝采用刚接、铰接、不连接3种工况下,分析老桥在新桥的收缩、徐变、沉降、车道荷载分别作用下的力学性能并进行对比。结果表明:农村公路桥梁由于跨径小,首先选择上、下部结构均不连接,桥面整体连续,并采用超薄磨耗层的方案;其次选择上部结构采用刚性连接,下部结构不连接的方案。Under the background of a bridge widening project in Shanghai,Midas Civil was used to establish a spatial finite element model,and the mechanical properties of the old bridge under the contraction,creep,settlement and lane load of the new bridge were analyzed and compared under three working conditions of rigid joint,hinged joint and non connection。Results:Due to the small span of rural highway bridges,the upper and lower structures shall not be connected,the bridge deck shall be continuous as a whole,and the ultra-thin wearing course shall be adopted.Secondly,the scheme that the upper structure is hinged and the lower structure is not connected is selected.

关 键 词：农村公路 桥梁改造 拼宽 空心板 Midas Civil软件 

分 类 号：U445.6[建筑科学—桥梁与隧道工程]