空实心GFRP管钢筋混凝土偏心受压构件徐变分析

Creep Analysis of Hollow and Solid GFRP Tube Reinforced Concrete Eccentric Compression Member

为研究徐变对空心和实心GFRP管钢筋混凝土偏心受压构件的影响,本文建立适用于空心和实心的GFRP管钢筋混凝土偏心受压构件的徐变公式。编制空、实心GFRP管钢筋混凝土偏心受压构件徐变程序,并分析具体算例,研究了偏心距、空心率、作用荷载、GFRP管壁厚度及混凝土强度等级等参数对偏心受压构件徐变的影响。研究结果表明:GFRP管钢筋混凝土偏心受压构件的徐变随偏心距的增大、空心率的增大、作用荷载的增大、GFRP管管壁厚度的减小及混凝土强度等级的提高而增大。空心率和作用荷载对GFRP管钢筋混凝土偏心受压构件徐变的影响较大,偏心距和GFRP管管壁厚度的影响次之,混凝土强度等级的影响相对较小。

In order to study the effect of creep on the eccentric compression members of hollow and solid GFRP tube reinforced concrete, the creep formula of hollow and solid GFRP tube reinforced con-crete was established. GFRP tube reinforced concrete eccentric compression member creep effect analysis and calculation was established, and a numerical example was calculated, analyzing the effect of eccentricity, the hollow rate, action load, the thickness of GFRP tube and strength grade of concrete to influence of eccentric compression member creep. Results of the computation showed that the creep of the eccentric compression member was increased with the increase of eccentricity, hollow rate, action load and strength grade of concrete, the decrease of the thickness of GFRP tube. The influence of hollow rate and action of the creep of GFRP tube reinforced concrete eccentric compression member was large, and eccentricity and the thickness of GFRP tube were the secondary factor. The strength grade of concrete was relatively small.