基于静载试验的简支空心板桥承载能力评估

Evaluation of Bearing Capacity of Simply Supported Hollow Slab Bridge Based on Static Load Test

桥梁荷载试验是检验在役桥梁工作状态和承载能力的一种常用试验方法,通过荷载试验测试桥梁结构在车辆偏载、中载作用下主梁的挠度和应变,将试验结果与模拟结果进行比对。结果表明,在车辆偏载和中载作用下,应变和挠度实测值均小于理论值,应变和挠度校验系数、相对残余变形均满足规范要求。说明该桥结构刚度与强度有一定的安全储备,可以满足桥梁结构的实际运营状况。

Bridge load test is a common test method to test the working state and bearing capacity of in-service bridge, the deflection and strain of main beam of bridge structure under vehicle partial load and medium load are tested by load test, and the test results are compared with the simulation results. The results show that under the use of vehicle partial load and medium load, the measured values of strain and deflection are less than the theoretical values, and the check coefficients of strain and deflection and relative residual deformation all meet the requirements of the specification. It shows that the structural stiffness and strength of the bridge have a certain safety reserve, which can meet the actual operation status of the bridge structure.