【作者】 钮鹏； 杨刚； 金春福； 张宁；

【Author】 Niu Peng;Yang Gang;Jin Chunfu;Zhang Ning;Institute of architectural engineering , Shenyang University;Institute of Road and Bridge Engineering, Dalian Maritime University;Highway Engineering Quality Inspection Center of Liaoning Provincial Communications College;

【机构】 沈阳大学建筑工程学院； 大连海事大学道路与桥梁工程研究所； 辽宁省交通高等专科学校公路工程质量检测中心；

【摘要】 基于计算压弯构件弹塑性失稳的Je?ek法,推导了在轴压和弯矩共同作用下具有初始几何缺陷且拉压侧外表面粘贴碳纤维片后的方钢管构件失稳时极限荷载的计算公式。通过采用弹塑性有限元法,结合非线性屈曲理论,进行了受初始几何缺陷影响的碳纤维增强方钢管构件在压弯荷载共同作用下的屈曲分析,并得到极限承载力的数值解。将数值分析结果与Je?ek法得到的解析解进行比对,可以发现两种结果吻合较好。计算结果说明,当构件两端给定的弯矩超过某一数值后,具有缺陷的碳纤维增强方钢管构件的极限承载力高于完善的裸方钢管构件的极限承载力,表明了碳纤维作为增强材料的有效性和实用性。更多还原

【Abstract】 Based on Jezek method of computing the elastic-plastic buckling of the member under the axial compressive load and the bending moment, 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 a square steel tube member with flange outsides wrapped by carbon fibre are derived. Using the elastic-plastic finite element method and the theory of nonlinear buckling, the impact by initial geometric imperfections on the square steel tube member wrapped by carbon fibre under the axial compressive load and the bending moment are analyzed and the numerical solutions of ultimate bearing capacity are obtained. By compared with the values of the finite element method(FEM), it shows that the analytical method in this paper is valid. When the given moment is more than a certain value, the ultimate bearing capacity of the steel member wrapped by carbon fibre is higher than that of the perfection bare square steel member. It is taken to illustrate that it is the effectiveness and availability to carbon fibre as reinforcement material.更多还原