联塔斜拉桥桥塔模型试验

Model Test for the Pylon of the Jointed-pylon Cable-stayed Bridge

为了研究斜拉桥桥塔联塔结构的整体力学性能,结合国内某座斜拉桥变更后方案设计开展了桥塔3∶40的缩尺模型试验研究。介绍了模型的设计原则、相似关系和测试工况,对模型的加载方案、应变和变形测点布置进行了讨论。重点是通过对试验结构的分析以及与理论计算的比较,全面研究了联塔结构在多种工况下的结构行为。结果表明:实测值与理论计算值吻合良好,结构设计安全可靠。

In order to investigate the whole structural behavior of the jointed-pylon of cable-stayed bridge,a 3∶ 40 scaled-down model experiment is conducted with reference to the changed design of a super large bridge.The design principle,the ratio of similarity and testing case are introduced briefly.The loading method,the strain and deformation test point arrangement are also discussed.The structural behavior of this type of structure is focuse on that is thoroughly studied by analyzing the results of the model experiment and comparing them with the theoretical ones.The results indicate that the test values agree well with theoretical ones and the structure is safe and reliable.