大悬臂现浇预应力混凝土连续箱梁横梁设计研究  

Study on Design of Large Cantilever Cast-in-place Prestressed Concrete Continuous Box Girder Beam

作　　者：吴欣 WuXin(Dalian Municipal Design and Research Institute Co.Ltd.,Xiamen Branch,Xiamen,Fujian 361006)

机构地区：[1]大连市市政设计研究院有限责任公司厦门分公司,福建厦门361006

出　　处：《江西建材》2024年第10期164-166,181,共4页

摘　　要：预应力混凝土连续梁桥具有整体性能好、结构刚度大、抗扭性能高、景观功能好等优点,是当下城市高架桥常用的结构形式。目前城市高架桥交通流量大、桥面较宽,且通常跨越条件比较受限,通常只能采用两支座布置且支座间距较小,桥梁支座距离悬臂端部距离大。为保证横向受力安全可靠,需对横梁进行单独设计与计算。文中结合工程实际,对宽桥面大悬臂横梁配束形式及截面尺寸进行了设计与计算分析,为宽桥面大悬臂预应力混凝土箱梁横梁设计提供一定的理论参考。Due to its advantages such as good overall performance,high structural stiffness,high torsional performance,and good landscape function,prestressed concrete continuous beam bridges are commonly used as structural forms for urban elevated bridges.At present,the traffic flow of urban elevated bridges is large,the bridge deck is wide,and the crossing conditions are usually limited.Usually,only two supports can be arranged with small spacing between them.The distance between the bridge supports and the cantilever end is large.In order to ensure the safety and reliability of lateral stress,separate design and calculation of the crossbeam are required.Based on engineering practice,the design and calculation analysis of the beam configuration and cross-sectional dimensions of wide bridge deck and large cantilever beams were carried out,providing a certain theoretical reference for the design of prestressed concrete box girder beams with wide bridge deck and large cantilever.

关 键 词：预应力混凝土 箱梁 横梁 有限元 

分 类 号：TU99[建筑科学—市政工程]