On Account of Fracture Mechanics to Analyze Basic Theory of Steel Bridge Fatigue

Ke TAN

School of Civil and Architectual Engineering, Chongqing Jiaotong University,Chongqing,400074,CHINA

Abstract: Steel bridges are all facing the fatigue problem now, the fatigue damage of steel bridge is caused due to the initiation and evolvement of micro-cracks under the impact of varying loads. The article expounds the fatigue crack damage mechanism, develop process and reasons of steel bridge also provides the method to calculate fatigue life of steel bridge by using fracture mechanics.

Keywords: Steel Bridge; Fracture Mechanics; Fatigue Crack; Fatigue Life