Fatigue Performance Analysis of Steel Pin Joints in Emergency Steel Truss Bridges
In emergency steel truss bridges,which are characterized as assembled structures,damage to the pin hole connection locations may occur during repeated processes of assembly,disassembly,and transportation,thereby impacting their service life.Accordingly,a specific 128 m span emergency steel truss bridge was selected for study.The edge distances of the pin holes were reduced to simulate the effects of damage on steel truss pin holes.Fatigue performance tests and simulation models were con-ducted to investigate the fatigue performance of steel pin joints.The results indicate that there is consid-erable consistency between the static simulation outcomes and the fatigue test results,thereby confir-ming the reliability of the model.The fatigue life of the steel pin joints,post-damage,as determined through experimentation,is only 16 980 cycles,while the fatigue life derived from FE-SAFE simulation analysis is 20 592 cycles,which are closely aligned,further verifying the reliability of the fatigue test results.The significant difference in fatigue life when considering pin hole damage,as compared to the normal state,suggests that such damage can considerably reduce the fatigue life.Therefore,attention should be given to the protection of rod components in emergency steel truss bridges,and the quality control of steel pin joints should be strengthened.
万方数据
维普
