Fatigue Problems of Some Typical Details in Modern Steel Highway Bridge Structures

Fatigue is one main factor that can reduce the durability of steel bridges.The fatigue performance of some details in steel bridge structures should be taken into account during design,construction and maintenance.The fatigue load spectrum and fatigue damage accumulation rule are discussed,and some suggestions for the fatigue analysis presented.On the basis of fatigue test results for some important structural details,fatigue performance of some new structures in long-span steel highway bridges built in recent years in china is studied.Finally,some methods for preventing modern steel highway bridge structures from fatigue failure are summarized.