轴压作用下CFRP约束钢管-活性粉末混凝土短柱承载力计算模型  

Analytic model for bearing capacity of CFRP confined reactive power concrete filled steel tube stub columns under axial compression

作　　者：何修义 李松 焦楚杰[3] 何松松 HE Xiuyi;LI Song;JIAO Chujie;HE Songsong(China Railway First Group(Guangzhou)Construction Engineering Co.,Ltd.,Guangzhou 511466,China;College of Urban and Rural Construction,Zhongkai University of Agriculture and Engineering,Guangzhou 510225,China;School of Civil Engineering,Guangzhou University,Guangzhou 510006,China)

机构地区：[1]中铁一局集团(广州)建设工程有限公司,广东广州511466 [2]仲恺农业工程学院城乡建设学院,广东广州510225 [3]广州大学土木工程学院,广东广州510006

出　　处：《混凝土》2023年第6期69-74,90,共7页Concrete

基　　金：国家自然科学基金(52078148,51778158,52108125);广东省普通高校重点领域专项(科技服务乡村振兴项目)(2021ZDZX4009);广东省水利科技创新重点资助项目(2017-32);珠海市社会发展领域科技计划项目(ZH22036201210032PWC);广州大学研究生创新能力培养资助项目(2018GDJC-D08);广州大学-中铁一局集团技术开发合作项目(2021)。

摘　　要：通过碳纤维增强树脂复合材料(CFRP)约束钢管-活性粉末混凝土(CFRP约束钢管-RPC)和钢管-RPC轴压短柱破坏过程的异同比较,探讨了CFRP套箍系数和钢管套箍系数对CFRP约束钢管-RPC和钢管-RPC的影响及内在联系,为CFRP约束钢管-RPC短柱承载力的理论分析奠定了基础。基于双剪强度理论,提出了简易的计算模型,基于叠加理论,通过分析核心RPC、钢管和CFRP的应力-应变方程,推导得出了CFRP约束钢管-RPC轴压短柱的理论计算模型,将两类计算模型结果分别与试验实测值相比较,验证了理论式的可取性。The similarities and differences of carbon fiber reinforced polymer(CFRP)confined reactive powder concrete filled steel tube(CFRP confined steel tube-RPC)and reactive powder concrete filled steel tube(steel tube-RPC)axial compression stub column failure process was compared.The influence of CFRP hoop coefficient and steel tube hoop coefficient on CFRP confined steel tube-RPC and steel tube-RPC was discussed,which laid the foundation for the theoretical analysis of the bearing capacity of CFRP confined steel tube-RPC stub columns.Based on the twin shear strength theory,a simple calculation model is proposed.Based on the superposition theory,the theoretical calculation model of CFRP confined steel tube-RPC axial compression stub column was derived by analyzing the stress-strain equation of core RPC,steel tube and CFRP.Comparing the results of the two types of calculation models with the experiment values respectively,the desirability of the theoretical formula is verified.

关 键 词：CFRP约束钢管-RPC 套箍系数 双剪强度理论 叠加理论 极限承载力 

分 类 号：TU528.01[建筑科学—建筑技术科学]