Research on the evaluation method of bearing capacity of existing Bridges based on dynamic load test

The author carried out dynamic load test research on a prestressed concrete rigid frame bridge. Under load, the ratios of measured and theoretical frequencies first four vertical vibrations bridge were 1.081, 1.153 respectively. corresponding damping are 0.011, 0.010 maximum coefficient sports car is 1.049, strain increment 0.059. impact between 0.012 0.049, which basically equivalent to design 0.05.The results show that existing works well under bearing capacity structure meets requirements level.