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桥梁实桥检测与荷载试验是评定桥梁结构耐久性、受力性能以及使用性能等的直接方法。犍为岷江大桥换索工程前后的两次检测与荷载试验分别对桥跨结构性能实施鉴定,也验证了换索工程成功地实现了恢复斜拉桥的承载与使用性能。从换索前后的静载试验结果对比,表明换索前索力异常,换索前的检测验证了斜拉索存在严重的病害,两次固有频率的测试结果表明斜拉索病害会明显导致结构固有频率值降低。
Bridge real bridge test and load test is to assess the durability of the bridge structure, the performance of the force and the use of direct method.犍 For the two tests and load tests of the Minjiang River Bridge before and after the cable replacement project, respectively, to identify the performance of the bridge span structure, also verified the cable replacement project successfully achieved the load-bearing and service performance of cable-stayed bridge. Comparison of static load test results before and after the change of the test results shows that the cable force before the change is abnormal, and the test before the change test verifies that there are serious diseases in the stay cables. The test results of two natural frequencies show that the disease of the stay cables will obviously lead to the structure The natural frequency decreases.