碳纤维增强H型压弯钢柱弹塑性失稳分析  

ELASTIIC-PLASTIC BUCKLING ANALYSIS OF AN H-SHAPED STEEL COLUMN WRAPPED BY CARBON FIBRE UNDER AXIAL COMPRESSIVE LOAD AND BENDING MOMENT

作　　者：钮鹏[1] 杨刚[1] 金春福[2] 范颖芳[1] 宫本奇[1] 

机构地区：[1]大连海事大学道路与桥梁工程研究所,辽宁大连116026 [2]大连理工大学土木水利学院,辽宁大连116024

出　　处：《工程力学》2010年第A01期85-89,共5页Engineering Mechanics

基　　金：大连海事大学青年骨干教师科技创新项目

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翼缘外表面粘贴碳纤维片后H形截面柱绕强轴失稳时极限荷载的计算公式。通过与有限元结果比较,表明了该解析解的正确性,这对构件弹塑性屈曲的基础理论研究十分有益。计算结果表明:构件所受弯矩越大,横截面进入塑性的区域就越大,这时碳纤维的增强效果就越明显,可见,表面粘贴碳纤维能够有效提高构件弹塑性极限承载能力。The Jezek method can be used for the elastic-plastic buckling analysis under axial compressive load and bending moment.This paper analyzes the ultimate buckling load of an H-shaped column with flange externally wrapped by carbon fibre using the Jezek method,and the analytical expressions about the neutral axis are derived.Through a comparison with the FEM results,the analytical method is proved to be valid.It is also observed that larger bending moment results in larger plastic zone and larger reinforcing effect of carbon fibre.It is demonstrated that the carbon fibre on the surface of steel member may significantly increase the ultimate carrying capacity.

关 键 词：结构工程 钢结构 弹塑性稳定 Jezek法 碳纤维 有限单元法 

分 类 号：O344.7[理学—固体力学] TU391[理学—力学]