浸泡环境下GFRP管混凝土短柱轴压承载力的理论分析和试验研究

Theoretical analysis and experimental study on axial compressive bearing capacity of short concrete columns confined with GFRP tubes under soaking condition

提出了基于Tsai-Hill各项正交异性板屈服准则的GFRP管屈服准则,并基于此推导出室温、水浸泡、海水浸泡环境下GFRP管混凝土短柱轴压极限承载力计算公式。通过6根GFRP管混凝土短柱轴压试验和21根有限元数值构件,验证理论计算公式的准确性,并进一步分析水、海水浸泡环境对GFRP管混凝土短柱轴压性能的影响。研究结果表明:基于GFRP管屈服准则建立的室温、水浸泡、海水浸泡环境下GFRP管混凝土轴压承载力计算公式可用于计算各环境下由GFRP管约束混凝土柱的轴压极限承载力。理论计算值与数值模拟值、试验值吻合较好。水。

The GFRP-tube yield criterion based on Tsai-Hill yield criterion of the orthotropic plate was presented,and the axial bearing capacity calculation formulas of GFRP tubes short concrete columns were derived based on this criterion under the conditions of room temperature,water immersion and seawater immersion.Through axial compression experiments of six GFRP tubes short concrete columns and twenty-one finite element numerical models,the accuracy of theoretical formulas was verified,and the effects of water and seawater immersion on the axial compressive properties of this were analyzed.The results indicate that,the axial bearing capacity calculation formulas of GFRP tubes short concrete columns based on the GFRP-tube yield criterion under the conditions of room temperature,water immersion and seawater immersion could be used to calculate the ultimate bearing capacity of the composite component,and the calculation was confirmed the good agreement with the numerical and experimental data.The water and seawater immersion environment have an influence on the ultimate bearing capacity and deformation performance of GFRP tubes short concrete columns.