Influencing Factors Analysis on Fatigue Life of Steel-concrete Composite Continuous Beam
In order to study the fatigue life and influencing factors of steel-concrete composite beams under fatigue load,fatigue loading tests were carried out on four scale models of composite beams.At the same time,the finite element software was used to establish the numerical model of the static load test of the steel-concrete composite beam,based on the fatigue analysis software,the fatigue life of the composite beam is calculated and compared with the test results to verify the accuracy of the numerical simulation.Finally,the main factors affecting the fatigue life of composite beams are analyzed by parameter analysis.It is concluded that the fatigue life of composite beams increases with the increase of concrete slab thickness,steel beam height and concrete strength grade,and increases with the decrease of stud spacing.It is suggested that the influence of concrete slab thickness and steel beam height should be given priority in the anti-fatigue design of composite beams.
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