【摘要】 对252m跨径的独塔斜拉桥——宜宾中坝金沙江大桥实施静力荷载试验,测试并分析静载工况下的主梁挠度、主塔塔顶变位、斜拉索索力增量、主梁与主塔的截面应力。试验结果表明桥跨结构受力合理,具有良好的刚度与强度。在动载试验中,测试桥跨结构的自振特性,并进行了行车激振试验,分析桥跨结构在行车下的冲击作用。同时分析了作为“指纹”档案的静动载试验结果在桥梁运营后的损伤检测中的应用理论与方法。更多还原

【Abstract】 Test the deflection of the beam and the tower, the change of tension of the cables, and the stress of the beam and the tower of Yibin Zhongba Jinshajiang River Bridge(one tower 252 m-span cable-stayed bridge) under static loads. The test results indicate that the structure has enough stiffness and strength .The natural vibration of the structure is tested, and the impact of the passing vehicles is analyzed. And the uses of results of static and dynamical tests in damage detection during the service period of the bridge is analyzed.更多还原