联塔分幅斜拉桥塔结构模型试验设计理论与方法研究

Model Test Design of Pylon Structure of Cable-Stayed Bridge with Jointed Pylons and Separated Girders

甬江特大桥为联塔四索面双幅预应力混凝土主梁斜拉桥,联塔部位承受复杂的弯曲、扭转以及剪切等复合内力传递,两幅桥的受力呈现出耦合状态。为了确保联塔结构的安全可靠,对整个桥塔进行3∶40的缩尺模型试验研究。介绍了模型试验的结构设计和加载方法设计,为今后类似结构试验模型的研制提供参考。

Yongjiang super - large bridge is a jointed pylon cable - stayed bridge with four cable planes and twin separate prestressed concrete girders. The joint part is under the state of combination with torsion, flexure and shear. The forcing state in separate twin bridges is in coupling conditions. In order to assure the safety and credibility of the jointed pylon, the test for the whole pylon is done with a scale of 3 ： 40. The structural design and loading methods for the testing model are briefly introduced, which are useful for the design of other similar structure testing model.