钢-高性能混凝土组合桥塔承载能力试验研究  

Experimental Research on the Limit Load Capacity of Steel-high Performance Concrete Composite Bridge Towers

作　　者：王茜[1] 王春生[1] 俞欣[1] 徐岳[1] 

机构地区：[1]长安大学桥梁与隧道陕西省重点实验室,陕西西安710064

出　　处：《郑州大学学报（工学版）》2008年第3期108-112,共5页Journal of Zhengzhou University（Engineering Science）

基　　金：霍英东青年教师基金资助项目(101078);国家西部交通建设科技项目(200431822317)

摘　　要：通过对钢-高性能混凝土组合桥塔节段进行轴压承载力试验,研究了组合桥塔的受力特性.参考相关规范和规程,对组合桥塔的承载力进行了计算.试验和计算结果表明:组合桥塔中混凝土的存在,可以避免或延缓塔壁发生局部失稳,提高结构的承载能力,较钢桥塔具有较大的优势;采用直接叠加的方法得到的承载力较试验值大7.3%,采用DB J13-51-2003中的方法得到的承载力较试验值大25.3%,前者计算简便,后者可以考虑壁板和混凝土的相互作用,但这两种方法均不能计入壁板局部屈曲的影响;组合桥塔的焊缝和母材应等强,否则会因焊缝破坏而造成整个结构的破坏.An axial compression test was carried out on a steel - high performance concrete composite bridge tower segment in order to study the mechanical behavior of composite bridge towers. The theoretic calculations of the limit load capacity of the specimen were conducted according to correlative codes. The test results and calculation data show that because of the existence of concrete, the composite towers can avoid or delay the local buckling of the tower panels and have more bearing capacity, which have more advantages than the steel bridge towers. The load capacity calculated by the superposition method is 7.3% larger than the test result, by the DBJ13 - 51 - 2003 method is 25.3% larger than the test result. The former method is convenient, while the latter can consider the restriction effect of the panels to the concrete, hut neither of the above methods takes into account the local buckling of the tower panels. The welds and the base metal of the composite towers should be equal in strength, otherwise the destructive of the welds can lead to the failure of the whole structure.

关 键 词：桥梁工程 钢-高性能混凝土 组合桥塔 稳定性 模型试验 承载力 

分 类 号：U443.38[建筑科学—桥梁与隧道工程]