圆截面CFRP-钢管混凝土柱的偏压试验

目的了解圆截面CFRP-钢管混凝土偏压柱的静力性能,分析长径比和偏心率对该类构件极限承载力的影响.方法对12根圆截面CFRP-钢管混凝土偏压柱开展静力试验并对实验结果进行理论分析.结果得到圆CFRP-钢管混凝土偏压柱的荷载-柱中挠度关系曲线,该曲线可以划分为以下几个阶段：弹性阶段,弹塑性阶段,塑性阶段和下降段.结论CFRP-钢管混凝土偏压柱的延性性能要好于FRP筒内填混凝土偏压柱.在其他参数相同的条件下,随着偏心率的增加,试件极限承载力降低,随着长径比的增加,试件极限承载力降低.

Experimental Study on Eccentrically Compressed Concrete Filled Circular CFRP- steel Tubular Columns

Twelve eccentrically compressed concrete filled circular CFRP-steel tubular columns are experimentally investigated and the test results are theoretically analyzed in order to understand their static performances and the influences of slenderness ratio and eccentricity ratio on the ultimate load bearing capacity.Within the factor scope of this test,it is found that the(load)-(middle point deflection of the specimens) curves can be defined as the following stages: elastic stage,elastic-plastic stage,plastic stage and descending stage.The ductility of the eccentrically compressed concrete filled circular CFRP-steel tubular columns is better than that of the eccentrically compressed concrete filled circular FRP tubular columns.Under the condition that other factors are the same,the bigger the eccentricity ratio,the smaller the ultimate load bearing capacity,and the bigger the slenderness ratio,the smaller the ultimate load bearing capacity.