Overall buckling behavior of 460 MPa high strength steel columns: Experimental investigation and design method
Overall buckling behavior of 460 MPa high strength steel columns: Experimental investigation and design method
复制标题
460 MPa高强钢柱整体屈曲性能：试验研究与设计方法
DOI：
10.1016/j.jcsr.2012.02.013
复制
发表时间：
2012-07-01
影响因子：
4.1
通讯作者：
Wang, Yuanqing
中科院分区：
文献类型：
--
作者：
Ban, Huiyong;Shi, Gang;Wang, Yuanqing
受压柱的整体屈曲行为是钢结构，特别是近年来应用越来越广泛的高强钢的重要研究课题之一。对460 MPa高强度钢受压构件的整体屈曲行为进行了试验研究。共12根立柱，包括焊接箱和l型截面。测量了残余应力、初始弯曲和加载偏心等初始缺陷。根据试验结果，对其屈曲变形和承载力进行了研究。建立了考虑初始缺陷的有限元模型，并与本研究和前人研究的试验数据进行对比验证。采用验证模型对大量不同截面尺寸和长度的柱进行了计算，并根据不同钢结构规范将其屈曲能力与设计值进行了比较。结果表明，该460 MPa高强度钢柱的无量纲屈曲强度较普通强度钢柱有明显提高，并提出了相应的柱曲线和设计公式。(C) 2012 Elsevier Ltd.版权所有。
Overall buckling behavior of compression columns is one of the most important research subjects in steel structures, especially for high strength steel which has been increasingly applied in recent years. An experimental investigation was carried out to study the overall buckling behavior of 460 MPa high strength steel compression members. Totally twelve columns including welded box and l-sections were comprised. The initial imperfections such as the residual stress, initial bending and loading eccentricity were all measured. Based on experimental results the buckling deformation and capacity were investigated. A finite element model was established and further validated by comparing with the test data in both present study and other previous researches, in which initial imperfections were taken into account. A large number of columns with various section dimensions and lengths were calculated by using the validated model, and their buckling capacities were compared with design values according to different steel structures specifications. It was found that the nondimensional buckling strength of such 460 MPa high strength steel columns were significantly improved compared to normal strength steel columns, and corresponding column curves and design formulae were suggested. (C) 2012 Elsevier Ltd. All rights reserved.