CFRP筋增强混凝土中长柱受力性能研究

Mechanical behavior of concrete middle long columns reinforced with CFRP

通过对4根CFRP筋混凝土偏心受压柱的试验研究,探讨了长细比对CFRP筋混凝土柱偏心受压性能的影响.试验结果表明,试件承载力随着长细比的增加而降低;试件破坏时未发生CFRP纵筋拉断破坏,卸载后其侧向变形几乎恢复.通过编制的有限元程序进行了CFRP筋混凝土偏心受压柱全过程受力分析,研究了相关影响参数对其侧向扰度的影响.基于参数分析的结果,给出了CFRP筋混凝土柱偏心距增大值的计算方法,其理论计算结果和试验结果符合较好.

For researching the effect of the concrete columns reinforced with CFRP （carbon fiber reinforced polymer） tendons by slenderness ratio, the four concrete columns reinforced with CFRP tendons were tested under the eccentric loading. The experimental results show that the bearing capacity of the specimens decreases with the increase of the slenderness ratio. When the specimen is destroyed, the tensile failure does not appeared in the CFRP tendons, and the lateral deformation is restored after unloading. The full-process force analysis of the concrete columns reinforced with CFRP tendons are carried out by the finite element program, and some related effect parameters of the lateral deforma tion are studied. Base on results of the analysis, the calculation theory of the eccentricity augmentation is proposed, and the theoretical values of bearing capacity agree with the test results very well.