Analysis oo the effect of steel ratio on axial compression properties of concrete filled steel tube under long-term load
In order to study the influence of steel content on the performance of concrete filled steel tube under long-term load,based on the reasonable material constitutive model,the deformation-time and bearing capacity-time of concrete-filled steel tubular columns with different steel loading rates under long-term loading are studied by finite element method.The relationship curve is calculated,and on this basis,the mechanism analysis of concrete filled steel tube under long-term load with different steel content is carried out.The analysis re-sults show that under the long-term load,the initial stress of the CFST members increases rapidly.With the passage of time,the deforma-tion is stable at about 200d,and the creep tends to be stable.If the steel content is large,the creep becomes small.With the increase of the steel content,the creepage of the concrete filled steel tube decreases.
万方数据
维普
