斜拉桥钢箱梁-混凝土索塔结合段的试验研究  

Test on the composite joint section between steel box girder and concrete tower of a cable-stayed bridge

作　　者：樊健生[1] 聂建国[1] 吕坚锋[1] 张革军[2] 杨晓滨[2] 

机构地区：[1]清华大学,北京100084 [2]中交公路规划设计院,北京100010

出　　处：《土木工程学报》2008年第7期61-66,共6页China Civil Engineering Journal

基　　金：国家高新技术研究发展专项“863计划”(2006AA11Z120);长江学者和创新团队发展计划资助(IRT00736)

摘　　要：厦门园博园11号桥为独塔双索面混合梁斜拉桥。为研究该桥梁-塔结合段的内力传递机理和构造措施,完成了钢箱梁-混凝土索塔结合段的施工模拟和局部足尺模型试验。试验前,基于全桥的设计计算结果和结合段整体结构的有限元分析,确定了模型试验的荷载工况和约束条件。模型试验测试的主要内容包括钢梁、混凝土、钢筋和钢绞线的应力以及结构的变形情况。模型试验以及与有限元计算结果的对比分析表明,该桥承压板式结合段传力可靠、构造合理,并具有较强的抗裂性能和较大的承载力储备,是一种合理的斜拉桥梁塔锚固构造形式。The Xiamen Yuanboyuan No.ll Bridge is a hybrid girder cable-stayed bridge with a single tower and double cable planes. To study the mechanical behavior of the joint, a full scale test on the composite joint between the steel box girder and the concrete tower is conducted. The loading cases and the boundary conditions of the model test are determined by a three-dimensional finite element analysis on the full-width model of the composite joint. The test focuses on the force transformation path of the joint, the stress distribution in steel, concrete and reinforcement under the design load, and the deflection behavior. The results of the model test and finite element analysis indicate that the force transformation of the composite joint is reliable with sufficient reservation on cracking resistance and loading capacity, and the composition details of the composite joint are rational.

关 键 词：斜拉桥 钢-混凝土结合段 模型试验 有限元分析 

分 类 号：U448.27[建筑科学—桥梁与隧道工程]