基于灰关联熵理论的CFRP-钢管混凝土构件轴压承载力影响因素分析
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摘要
针对CFRP-钢管混凝土结构构件轴心受压承载力评价问题,给出了灰关联熵理论的应用步骤,并基于灰关联熵理论,分析了钢管厚度、钢管屈服强度、核心混凝土截面面积以及CFRP厚度等因子对CFRP-钢管混凝土结构构件轴心受压承载力影响的主次关系和影响程度。研究结果表明:灰关联熵理论是一种简单实用的分析方法,可以有效地应用于组合结构的承载力评价;在选取的各影响因子中,核心混凝土的截面积与构件的极限承载力的灰关联熵值最大。研究结果可以为CFRP-钢管混凝土结构构件的理论研究和实践应用提供参考。
To evaluate the bearing capacity of concrete filled CFRP-steel tube under axial compression,the application steps of grey relation entropy theory is put forward.Based on the grey relation entropy theory,the primary and secondary relations of various factors,including the thickness and yield strength of steel tube,sectional area of core concrete and thickness of CFRP,influencing the bearing capacity of concrete filled CFRP-steel tube under axial compression is analyzed.The results indicate that the grey relation entropy theory is simple and practical,and can be used to evaluate the bearing capacity of composite structure.And among various factors,the grey relation entropy between the sectional area of core concrete and ultimate bearing capacity of structure is most main factor.Besides,the research results can provide reference for the theoretical study and practical application of concrete filled CFRP-steel tubular structure.
To evaluate the bearing capacity of concrete filled CFRP-steel tube under axial compression,the application steps of grey relation entropy theory is put forward.Based on the grey relation entropy theory,the primary and secondary relations of various factors,including the thickness and yield strength of steel tube,sectional area of core concrete and thickness of CFRP,influencing the bearing capacity of concrete filled CFRP-steel tube under axial compression is analyzed.The results indicate that the grey relation entropy theory is simple and practical,and can be used to evaluate the bearing capacity of composite structure.And among various factors,the grey relation entropy between the sectional area of core concrete and ultimate bearing capacity of structure is most main factor.Besides,the research results can provide reference for the theoretical study and practical application of concrete filled CFRP-steel tubular structure.
引文
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[9]张扬,牛荻涛,杨红霞.酸雨环境下粉煤灰混凝土抗压强度的灰关联分析[J].硅酸盐通报,2017,36(6):1995-1999.
[10]顾威,关崇伟,赵颖华,等.圆CFRP钢复合管混凝土轴压短柱试验研究[J].沈阳建筑大学学报(自然科学版),2004,20(2):118-120.
[2]朱春阳,赵颖华,孙丽.FRP约束钢管混凝土柱轴力-弯矩相关关系研究[J].计算力学学报,2017,34(2):244-250.
[3]魏洋,李国芬,端茂军.矩形FRP-钢复合管混凝土短柱的轴压试验研究[J].玻璃钢/复合材料,2014(12):47-51.
[4]王庆利,牛献军,冯立明.圆CFRP-钢管混凝土压弯构件滞回性能的参数分析与恢复力模型[J].工程力学,2017,34(b06):159-166.
[5]SHAKIR A S,GUAN Z W,JONES S W.Lateral impact response of the concrete filled steel tube columns with and without CFRPstrengthening[J].Engineering Structures,2016(116):148-162.
[6]SUN G S,ZHAO Y H,GU W.Stability of concrete filled CFRP-steel tube under axial compression[C]//Proceedings of Tubular Structures XII,2008:111-116.
[7]张岐山,邓聚龙.灰关联熵分析方法[J].系统工程理论与实践,1996,16(8):7-11.
[8]赵晶,杨帆,曲俊龙,等.基于灰关联分析水下混凝土和易性与砂浆流变性的关系[J].混凝土,2017(5):140-142.
[9]张扬,牛荻涛,杨红霞.酸雨环境下粉煤灰混凝土抗压强度的灰关联分析[J].硅酸盐通报,2017,36(6):1995-1999.
[10]顾威,关崇伟,赵颖华,等.圆CFRP钢复合管混凝土轴压短柱试验研究[J].沈阳建筑大学学报(自然科学版),2004,20(2):118-120.