GFRP加固混凝土柱轴压性能的有限元分析

Behavior of gfrp-confined concrete columns under uniaxial loading

采用试验及有限元的方法对玻璃纤维聚合物(GFRP)约束混凝土柱的性能进行了研究与分析。试件主要考虑了圆柱和方柱两种类型,试验参数有玻璃纤维的加固形式(全包与条带)及其加固量等。试验结果表明,两种形式的柱加固后约束混凝土柱的强度和应变均相应得到了提高。有限元的非线性分析结果与试验结果进行了对比。分析结果表明,合理的选择数值分析的模型,并选择合适的参数,可以较好地预测轴压下GFRP约束混凝土柱的力学性能。根据数值分析的结果确定了一些共性的参数,以供其他的情况分析。

The behavior of concrete columns confined with glass fiber-reinforced polymer is studied in this paper by means of experiment and finite element analysis(FEM).Some design parameters,such as,quantity and bundling form of GFPR,are considered as the influence factor on test result from cylinder columns and square columns.The test reveals that the strength and the strain of the confined concrete columns increased both for cylinder and square columns.The calculated results were compared with the test ones.The results indicate FEM can well simulate the behavior of concrete columns under uniaxial loading when parameters and numerical models are carefully chosen.From the numerical results,some common parameters could be determined for references.