Abstract
Prestressed concrete hollow slab bridge is widely applied in the highway bridge in our country, this paper shows that longitudinal crack appeared earliest in the defective component parts based on the test of 30 m span real bridge under plate cyclic loading experiment. The test data show that at the initial stage when the load is low and crack width is narrow, cyclic loading does not exerts an influence crack development, and when the load increase and crack expand to a certain level, cyclic loading exerts an influence crack development visibly. The discipline between the crack width with loading process is also studied, and the conclusion is helpful to understand load cracking behavior under cyclic loading and damage accumulation and performance of bridges.
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