大跨径组合梁斜拉桥试设计及力学性能研究

发布时间：2018-04-22 13:18

本文选题：斜拉桥 + 组合梁　；参考：《桥梁建设》2017年04期

【摘要】：为探索千米级组合梁斜拉桥的技术可行性,以主跨700,800,900,1 000m为目标,开展大跨度双塔组合梁斜拉桥方案试设计。从结构静力强度、静力稳定、颤振稳定等多方面论证方案的可行性,并指出设计主要控制因素。针对主跨1 000m的组合梁斜拉桥,对钢-混界面滑移影响、几何非线性效应两方面的力学性能进行研究。结果表明:设计方案是成立的,组合梁斜拉桥动、静力性能均满足要求,运营组合下近塔区混凝土桥面板应力、主梁面内失稳为设计主要控制因素。对千米级组合梁斜拉桥而言,在组合梁连接件按常规设计的情况下,钢-混界面滑移对斜拉桥受力性能的影响基本可忽略;几何非线性效应对活载工况影响较大,对收缩徐变工况影响较小。
[Abstract]:In order to explore the technical feasibility of the cable-stayed bridge with composite beams of the kilometer class, the pilot design of the cable-stayed bridge with large span double-tower composite beam was carried out with the main span of 700800900 ~ 1 000m as the target. The feasibility of the scheme is demonstrated from the aspects of static strength, static stability and flutter stability of the structure, and the main control factors of the design are pointed out. The mechanical properties of composite girder cable-stayed bridge with main span of 1000 m are studied in terms of the influence of steel-concrete interface slip and geometric nonlinearity. The results show that the design scheme is established, the dynamic and static performance of composite girder cable-stayed bridge meets the requirements, the stress of concrete deck slab near the tower area under operation combination and the instability of the main beam plane are the main control factors of the design. For the cable-stayed bridge with kilometer composite beam, the influence of steel-mixed interface slip on the mechanical performance of cable-stayed bridge can be neglected basically, and the geometric nonlinear effect has a great influence on the live load condition of the cable-stayed bridge. It has little effect on shrinkage and creep condition.
【作者单位】：上海市政工程设计研究总院(集团)有限公司;同济大学桥梁工程系;
【基金】：国家重点基础研究发展计划(973计划)项目(2013CB03603)~~
【分类号】：U448.27

【相似文献】