In order to evaluate the actual bearing capacity of a rigid frame arch bridge

determine the actual work condition of the bridge and provide a scientific basis for the maintenance and reinforcement of the bridge

a field load test of the bridge was carried out. Each measurement value of the bridge structure under the design standard load is calculated by the bridge finite element software before the load test. The deflection

strain

natural vibration characteristic and impact coefficient of the structure were tested in the load test

and the results were compared with the theoretical analysis. The results show that: The calibration coefficient of bridge beam body tested in the load test is between 0. 92 and 0. 74

which is not beyond the limit value 1. 0 of the standard

at the same time this indicates that the stiffness of the bridge structure has a certain affluence. The modal measurement results of the test span by the dynamic test and the theoretical modal analysis are identical

which shows that the bridge structure stiffness meets the application requirement. The carrying capacity of the bridge under normal use condition can not meet relevant specification requirement

and it is suggested that carrying capacity of the bridge should be strengthened.