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《Engineering Mechanics》 2013-S1
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A STUDY ON STABILITY OF STEEL MEMBER WITH INITIAL IMPERFECTION WRAPPED BY CARBON FIBER

NIU Peng1,2,JIN Chun-fu3,YANG Gang4,ZHANG Di1(1.Institute Of Architectural Engineering,Shenyang University,Shenyang,Liaoning 110044,China;2.Key Laboratory of Geoenvironmental Engineering of Liaoning Province,Shenyang University,Shenyang,Liaoning 110044,China;3.Highway Engineering Quality Inspection Center of Liaoning Provincial Communications College,Shenyang,Liaoning 110122,China;4.Institute of Road and Bridge Engineering,Dalian Maritime University,Dalian,Liaoning 116026,China)  
Considering the initial imperfection,the analytical expressions of calculating the ultimate load of buckling about the neutral axis with the maximum moment of inertia for an H-shaped member with flange outsides wrapped by carbon fiber are derived.Using the elastic-plastic finite element method and the theory of nonlinear buckling,the impact by initial geometric imperfections on an H-shaped steel member wrapped by carbon fiber under axial compressive load and bending moment are analyzed and the numerical solutions of ultimate bearing capacity are obtained.By the comparison with the values of the finite element method(FEM),it shows that the analytical method proposed is valid.When the given moment is more than a certain value,the ultimate bearing capacity of the steel member wrapped by carbon fiber is higher than that of the H-shaped perfection bare steel member.It is taken to illustrate that it is the effectiveness and availability to carbon fiber as reinforcement material.
【Fund】: 国家科技支撑计划项目(2011BAJ06B04);; 沈阳大学辽宁省环境岩土工程重点实验室开放基金项目(201243)
【CateGory Index】: O344.1;TU392.1
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