摘要
重点研究了板的初始几何缺陷、残余应力、高厚比及边长比等影响因素与抗剪极限承载力的关系,推导出铰接刚性边界焊接板抗剪承载力计算公式。研究表明,初始几何缺陷分布模态、大小和残余应力对板的抗剪极限承载力的影响程度可以忽略不计,从而大大地简化了抗剪板承载力的计算;在经过大量塑性塑动后,较小高厚比受剪板的屈曲后强度有一定的提高,而薄板基本保持不变。
Based on previous research work, special attention is paid on the influence of parameters on the ultimate or post-buckling strength of panels. These parameters are initial geometric imperfection, residual stresses, width to thickness ratio and aspect ratio of the panels. ANSYS software is employed to investigate the geometric and material nonlinear behavior of the panels. It is found from the numerical studies that initial geometric imperfection and residual stress have little influence on the shear-carrying capacity of the panels, and these parameters can be neglected for the simplified calculation and design. The elastic buckling loads should be taken into account in evaluating shear-carrying capacity of the thicker panel which may increase with the increase of shear deformation induced by lateral displacement, while the thinner one keeps almost unchanged after large shear deformation. Two formulae for evaluation of shear-carrying capacity of the panels are suggested.
出处
《工程力学》
EI
CSCD
北大核心
2003年第2期49-54,共6页
Engineering Mechanics
关键词
非加劲受剪板
初始几何缺陷
残余应力
极限承载力
Computer simulation
Defects
Residual stresses
Shear deformation
Steel structures
