- 摘 要
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(1 安徽理工大學土木建筑學院， 淮南 232001； 2 哈爾濱工業(yè)大學土木工程學院， 哈爾濱 150090)
［摘要］為了解腹板V形加勁冷彎薄壁卷邊槽鋼中長柱的受壓性能，對12根開孔和未開孔中長柱進行了軸心受壓試驗研究。結果表明，所有試件均發(fā)生畸變屈曲失效，同時在峰值荷載時有繞弱軸的整體彎曲產生；孔洞的出現(xiàn)導致屈曲模態(tài)和屈曲半波數(shù)發(fā)生變化。最后，在試驗和國外規(guī)范關于直接強度法計算理論的基礎上，提出了一種適用于開孔和未開孔腹板V形加勁冷彎薄壁卷邊槽鋼中長柱畸變屈曲承載力的計算方法。采用該建議方法計算所得結果與試驗值和參數(shù)分析值吻合較好，安全可靠。
［關鍵詞］冷彎薄壁型鋼; 卷邊槽形柱; 試驗研究; 畸變屈曲; 直接強度法; 中長柱; 孔洞
中圖分類號：TU392.1 文獻標識碼：A 文章編號：1002-848X(2014)16-0041-05
Distortional buckling load-carrying capacity analysis for cold-formed thin-walled steel lipped channel intermediate length columns with V-stiffener in the web
Yao Yonghong1, Wu Zhenyu2, He Wei1
(1 School of Civil Engineering and Architecture, Anhui University of Science and Technology, Huainan 232001, China; 2 School of Civil Engineering, Harbin Institute of Technology, Harbin 150090, China)
Abstract: In order to investigate the compression behavior of cold-formed thin-walled steel lipped channel intermediate length column with V-stiffener in the web, experiments were conducted on 12 intermediate length columns with and without holes under the axial compression. It is shown that all of the specimens fail from distortional buckling and the global buckling around the weak aixs is found under the peak load. The holes change the buckling modes and the number of distortional buckling half-waves. Finally, based on the experimental results and the direct strength method given in abroad specification, a suggested method was presented to estimate the distortional buckling load-carrying capacity for cold-formed thin-walled steel lipped channel intermediate length columns with and without holes in the V-stiffener web, and the values calculated by the proposed method were in good agreement with the results of experimental and parameter analysis. It is shown that the proposed method is safe and reliable.
Keywords: cold-formed thin-walled steel; lipped channel column; experiment investigation; distortional buckling; direct strength method; intermediate length column; hole
*安徽理工大學博(碩)基金(11190)，安徽省住房與城鄉(xiāng)科學技術項目（2013YF-11），安徽省自然科學基金(1208085QE80)。
作者簡介：姚永紅，博士，講師，Email: yhyao@aust.edu.cn。
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