Static charicrastics analysis of reinforced Songhua River highway bridge in Jiamusi

The detection aims at testing the quality of design and construction and values the working property of the designed load. The static load test is focused on testing and analyzing main girder camber, vertical deflection at the bracket, cable tension, the main causes of cracks in beams. Under the test load, the natural frequency of external tendons increase in amplitude 4.3% to 9.0%, and the change is little; the strain of anchoring transverse on concrete beams is measured very small, almost negligible. It is proved that the vehicle load on the role of anchor beams is small, which is not the main cause of the tensile stress cracking. Calibration coefficient of deflection and strain meet the requirements, so that no new cracks come into being. It is shown that the performance of the reinforced bridge meet the requirements, therefore the reinforcement method can provide a reference for related similar bridges.