Evaluation of bearing capacity of reinforced stone arch bridge based on dynamic load test

In order to evaluate the stress and working performance of a reinforced stone arch bridge, the load test of the bridge is carried out. Static load test is to test the stress and displacement of each section of the main arch ring under the action of partial load and medium load. The results show that under the action of various loads, the check coefficients of deflection and strain of this bridge do not exceed the specification limit of 1.0 of masonry arch bridge, the actual working performance of the structure is good, the maximum value of relative residual strain and relative residual deformation are 11.11% and 8.21% respectively, and they do not exceed the standard allowable value of 20%, and the whole bridge is in the elastic deformation stage. The test results show that the reinforcement method of thickening the main arch ring has good application value, can effectively improve the service level of the old bridge and prolong the safety service life, and has obvious social and economic benefits.