王春刚, 张耀春. 卷边槽钢偏心受压构件极限承载力的直接强度计算方法研究[J]. 工程力学, 2009, 26(2): 97-102.
引用本文: 王春刚, 张耀春. 卷边槽钢偏心受压构件极限承载力的直接强度计算方法研究[J]. 工程力学, 2009, 26(2): 97-102.
WANG Chun-gang, . DIRECT STRENGTH-METHOD STUDY ON ULTIMATE LOAD-CARRYING CAPACITY OF ECCENTRICALLY LOADED LIPPED CHANNELS[J]. Engineering Mechanics, 2009, 26(2): 97-102.
Citation: WANG Chun-gang, . DIRECT STRENGTH-METHOD STUDY ON ULTIMATE LOAD-CARRYING CAPACITY OF ECCENTRICALLY LOADED LIPPED CHANNELS[J]. Engineering Mechanics, 2009, 26(2): 97-102.

卷边槽钢偏心受压构件极限承载力的直接强度计算方法研究

DIRECT STRENGTH-METHOD STUDY ON ULTIMATE LOAD-CARRYING CAPACITY OF ECCENTRICALLY LOADED LIPPED CHANNELS

  • 摘要: 直接强度法是确定薄壁构件承载力非常有效的一种新方法。利用ANSYS分析确定了卷边槽钢截面的有效形心偏移量,并建立了有效形心偏移的计算公式。在此基础上,提出了对称轴平面内偏心受压状态下,卷边槽钢简支构件在弯矩作用平面内的稳定承载力直接强度计算方法。方法中考虑了局部与整体以及畸变与整体的相关屈曲,并考虑了截面有效形心的偏移。与试验及有限元分析结果的对比表明,用该方法确定卷边槽钢截面有效形心的偏移及偏压构件的极限承载力是可行的。

     

    Abstract: The direct strength method is a very effective new way for calculating carrying capacity of thin-walled members. The shift of lipped channel effective centroid is determined by ANSYS analysis and its formula is established also. Based on this point, the direct strength method for calculating the ultimate load-carrying capacity about the minor axis of pin-ended lipped channels under eccentric compressive axial load acted in the plane of major axis is proposed. The method can consider local and overall interaction buckling, distortional and overall interaction buckling, as well as the shift of the effective centroid. The results compared with the test ones and the finite element analysis shows that this method is valid for calculating the shift of lipped channel effective centroid and the ultimate load-carrying capacity of eccentrically loaded lipped channels.

     

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