两跨连续预应力混凝土宽箱梁桥空间受力性能分析  

Analysis on Spatial Mechanical Property of Two-span Continuous Prestressed Concrete Wide-box Girder Bridge

作　　者：戚泽远 QI Zeyuan

机构地区：[1]同济大学建筑设计研究院(集团)有限公司,上海市200092

出　　处：《城市道桥与防洪》2020年第12期62-65,69,M0009,共6页Urban Roads Bridges & Flood Control

摘　　要：以某座(60+40)m现浇预应力混凝土连续宽箱梁为工程背景,通过建模计算,分析宽箱梁的空间受力性能,用以指导设计。结果显示:不同约束条件对宽箱梁支点处的横向受力分配影响很大;均布恒载作用下边腹板的受力分配比例增大;活载偏载对宽箱梁的应力横向分配影响很大,设计时需考虑一定的偏载系数。Based on the engineering background of a 60+40m cast-in-place prestressed concrete continuous wide-box girder,the spatial mechanical property of the wide-box girder is analyzed by modeling calculation to guide the design.The results show that different constraint conditions have great influence on the lateral force distribution at the fulcrum of the wide-box girder.The force distribution ratio of the side web increases under the uniformly distributed constant load.The live load and unbalance load have a great influence on the stress crosswise distribution of wide-box girder.A certain unbalance loading coefficient is considered during design.

关 键 词：预应力混凝土连续梁桥 宽箱梁 空间受力 偏载系数 

分 类 号：U441[建筑科学—桥梁与隧道工程]