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受压构件弯扭屈曲换算长细比的研究现状与展望
STATE-OF-THE-ART ON RESEARCH OF THE EQUIVALENT SLENDERNESS RATIO FOR COLUMNS FAILED BY FLEXURAL-TORSIONAL BUCKLING
【Author】 Zhou Xuhong;Liu Zhanke;Ma Zhangyong;Xu Yingxian;Chang Zhouqi;School of Civil Engineering,Chongqing University;Key Laboratory of Mechanics on Disaster and Environment in Western China,the Ministry of Education of China,Lanzhou University;Gansu Science and Technology Construction Group Co.,Ltd.;College of Civil Engineering and Mechanics,Lanzhou University;
【机构】 重庆大学土木工程学院; 兰州大学西部灾害与环境力学教育部重点实验室; 兰州大学土木工程与力学学院; 甘肃省科工建设集团有限公司;
【摘要】 受压构件弯扭屈曲的换算长细比是计算其极限荷载的重要参数。本文从构件的边界约束条件的角度梳理了任意截面理想受压构件弯扭屈曲临界荷载的一元三次方程的研究现状,分析了单轴对称截面理想受压构件弯扭屈曲换算长细比理论研究的研究现状,以及梳理了我国现行标准GB 50017-2017、GB 50018-2002中受压构件弯扭屈曲换算长细比的设计理论的研究现状,揭示了当前相关研究存在的问题,并对后续的研究进行了展望。
【Abstract】 The equivalent slenderness ratio is a key parameter for determining the ultimate load of columns failed with flexural-torsional buckling.In this paper,the state-of-the-art on research of the cubic equation for determining the critical load of columns with arbitrary cross-section and failed with flexural-torsional buckling,are analyzed from the point of view of boundary conditions.The state-of-the-art on research of equivalent slenderness ratio for columns with singly symmetric cross-section is also summarized.The design approaches about equivalent slenderness ratio,including by the current design standard GB 50017-2017 and GB 50018-2002,are then analyzed.The existing problems are pointed out,and the follow-up research is prospected.
【Key words】 thin-walled columns; flexural-torsional buckling; equivalent slenderness ratio; state-of-the-art;
- 【会议录名称】 第二十三届全国现代结构工程学术研讨会论文集
- 【会议名称】第二十三届全国现代结构工程学术研讨会
- 【会议时间】2023-07-21
- 【会议地点】中国甘肃兰州
- 【分类号】TU391
- 【主办单位】天津大学、天津市钢结构学会