GFRP管混凝土组合构件偏心受压力学性能数值分析

为了研究影响GFRP管约束混凝土柱的偏心受压力学性能的因素,利用有限元软件ABAQUS建立了GFRP管混凝土柱偏心受压模型,并分析了GFRP管纤维缠绕角度、GFRP管管壁厚度、混凝土强度等级以及含钢率等因素对构件偏压力学性能的影响,对数据进行回归处理并得到偏心受压承载力公式.结果表明:数值计算结果与试验结果吻合良好;增加GFRP管管壁厚度、提高混凝土强度等级以及增加含钢率均能提高组合柱偏压承载力,偏心受压承载力公式计算结果与试验结果吻合较好.

Numerical analysis for mechanical properties of GFRP tube concrete composite member under eccentric compression

In order to study the factors that influencing the eccentric compression mechanical properties of GFRP tube confined concrete column, an eccentric compression model for GFRP tube concrete column was established with the finite element software ABAQUS, and the influence of such factors as the fiber winding angles of GFRP tube, the thickness of GFRP tube, concrete strength grade and steel ratio on the eccentric compression mechanical properties of the members was analyzed. Then the data were carried out with the regression treatment, and the eccentric compression bearing capacity formula was obtained. The results show that the numerical calculation results were in good agreement with the experimental results. Through increasing the thickness of GFRP tube, the concrete strength grade or the steel ratio, the eccentric compression bearing capacity of composite column all can be improved. The eccentric compression bearing capacity formula is in good agreement with the experimental results.