Research on the bending bearing performance of high-strength thin-walled concrete filled circular steel tube components
In order to study the bending performance of high-strength thin-walled steel tube concrete members,a finite element numerical model is established and compared with experiments to verify the accuracy of the numerical model.The influence of concrete strength grade,steel yield strength,and steel content on the bending bearing capacity of high-strength thin-walled steel tube concrete members is analyzed,and the applicability of the current standard bearing capacity calculation formula is evaluated.The results indicate that the finite element model can effectively simulate the failure mode(mid span failure),load displacement curve,and bearing capacity of the specimen;Increasing the strength of steel or concrete results in an approximate linear increase in bearing capacity,but the impact of concrete strength on bearing capacity is smaller than that of steel pipe strength grade;When the thickness of the steel pipe is the same and the steel content gradually increases,the smaller the cross-sectional size of the component and core concrete,and the degree of decrease in the bearing capacity of the specimen gradually decreases;Technical code for concrete filled steel tubular structures can be used to calculate the flexural bearing capacity of high-strength thin-walled steel tube concrete members.
high strength thin-walled steel tube concretehigh strength steelbending resistancefinite element simulationparameter analysis
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