冷弯型钢骨架墙体抗剪性能研究

STUDY ON THE SHEAR PERFORMANCE OF COLD-FORMED STEEL FRAMING WALLS

在冷弯型钢骨架墙体抗剪模型得到试验充分验证的基础上,对影响墙体抗剪性能的8个因素进行了有限元参数分析。分析结果表明:墙体骨架壁厚、骨架屈服强度、立柱截面大小、竖向荷载大小的变化及一定范围内墙体高度的变化对墙体抗剪承载力影响不大;增加墙面板厚度可以有效地提高墙体抗剪承载力;在墙体尺寸等不变的情况下,立柱间距的减小有助于墙体抗剪承载力的提高;墙面板采用带肋钢板代替平钢板,在墙体抗剪承载力、墙板平面外鼓出量上均有很大的改进,并且随着肋高的增加,其抗剪承载力增加,墙板平面外鼓出量减小。

A parameter analysis of eight influencing factors of the shear performance of cold-formed steel framing walls is carried out after the finite element analysis model has been validated by test data. The analytic results show that it has little effect on the shear resistance of the wall by changing wall framing thickness, yield strength of wall framing, cross section of wall studs, vertical loading and altering the wall height in a certain range. The shear resistance of the wall can be improved effectively by thickening the wallboard; when the wall size is not changed, decreasing stud spacing is helpful to increase the shear resistance of the wall ; the shear resistance of the wall and the deformation out of plane of the steel panel can be greatly improved by substituting the steel rib panel for the smooth plate, and with the increase of the steel rib height, the shear resistanee of the wall is enhanced and the deformation out of plane of the steel panel is reduced.