现浇预应力混凝土箱梁桥受力性能分析与预应力设计  

Mechanical Performance Analysis and Prestress Design for the Cast-in-Place Prestressed Concrete Box Girder Bridge

作　　者：李晓辉 LI Xiao-hui(Beijing Guodaotong Highway Design and Research Institute Co.Ltd.,Beijing 100161,China)

机构地区：[1]北京国道通公路设计研究院股份有限公司,北京100161

出　　处：《工程建设与设计》2024年第5期101-103,共3页Construction & Design for Engineering

摘　　要：对多跨现浇混凝土连续箱梁桥预应力分析与设计方法进行论述,以某高速公路预应力混凝土连续梁桥为工程实例,对其进行现浇后张法预应力混凝土多跨连续箱梁受力性能分析研究。在现行设计规范荷载作用下,根据箱梁受力状态进行纵向预应力钢束设计方法,使其具有良好的使用性能,满足现行设计规范要求,并结合实例对现浇混凝土连续梁预应力设计给出优化建议。The pre-stressed analysis and design method of multi-span cast-in-place(CIP)concrete box-girder bridge was discoursed.Taking pre-stressed concrete highway bridge as an example,this study focuses on the analysis of multi-span CIP post-tensioned concrete(PS)box-girder mechanical property.Under the traffic load specified in current design specification,the research applies the pres-tress tendon design method based on the box-girder mechanical performance to provide excellent performance in service,and meantime meet the requirements in the current design specification,and gives some optimized suggestions for the design of the CIP continuous concrete pre-stressed box-girder bridge.

关 键 词：多跨连续梁桥 混凝土箱梁 受力性能 预应力钢束 有限元方法 

分 类 号：U448.213[建筑科学—桥梁与隧道工程]