双层桥面三桁刚性悬索加劲钢桁梁桥全桥试验模型

Test Model of Whole Bridge of Double-deck and Three Main Trusses Steel Bridge with Rigid Cable

为了研究中国首座双层桥面三桁刚性悬索加劲钢桁梁桥——东江大桥的空间受力行为,并检验施工方案,针对其结构独特、受力复杂、施工难度大的特点,进行了全桥缩尺模型试验。详细介绍了东江大桥模型试验的目的、模型总体构造、截面设计原则、连接构造、施工过程模拟、支座设计以及试验加载等。从模型设计可以看出:该模型制造难度较大;研制的模型能够满足利用试验模拟施工全过程以及对结构局部进行测试的要求。

In order to study spatial mechanical behavior and test construction project of Dongjiang Bridge （the first double-deck and three main trusses steel bridge with rigid cable in China）, aimed at the character of unique structure and complicated stress, scale model was tested. Testing purpose, model total layout, section design principle, ioint structure, construction stages simulation, support design and loading in test were given in detail. The model design shows that the test model is hard to make, and the test model can satisfy the requirements for simulating the whole construction process and for testing the local parts of the bridge structure.