组合T形钢管再生混凝土中长柱偏压性能分析

Combined T Recycled Concrete Filled Steel Tube Long Column Bias Performance Analysis

为研究组合T形钢管再生混凝土中长柱在偏压情况下的力学性能,运用有限元软件ABAQUS对28根组合T形钢管再生混凝土偏压中长柱试件进行数值模拟,分析试件的荷载-变形曲线,探究偏心距、再生骨料取代率、长细比等参数对组合T形试件偏压性能的影响规律。研究结果表明,钢管厚度、长细比、偏心距的变化对试件偏压性能的影响较大,再生骨料取代率的升降对试件初始刚度、峰值挠度、剩余承载力和偏压承载力的影响较小,加载角的变化对试件偏压承载力的影响并没有呈现递增或递减规律,其中加载角为90°的试件偏压性能更优。

In order to study the mechanical properties of recycled concrete filled T-shaped steel tubes under eccentric compression,the finite element software ABAQUS was used to numerically simulate 28 specimens of recycled concrete filled T-shaped steel tubes under eccentric compression,and the influence of the load-deformation curve,eccentricity,recycled aggregate replacement ratio,slenderness ratio and other parameters on the eccentric compression performance of the composite T-shaped specimens was analyzed.The results show that the change of steel tube thickness,slenderness ratio and eccentricity has a great influence on the eccentric performance of the specimen,and the increase or decrease of recycled aggregate replacement rate has little influence on the initial stiffness,peak deflection,residual bearing capacity and eccentric bearing capacity of the specimen,while the change of loading angle has no increasing or decreasing law on the biased bearing capacity of specimen,Among them,the specimen with loading angle of 90 has better biasing performance.