波纹钢板剪力墙剪切屈曲性能研究

Shear buckling behavior of corrugated steel plate shear wall

为了研究波纹钢板剪力墙剪切屈曲性能,根据已有的正交各向异性板理论基础,将波纹钢板等效为相同厚度的正交各向异性板,总结并提出了波纹钢板剪切弹性局部屈曲、相关屈曲和整体屈曲应力的计算公式,并得到波纹钢板剪力墙弹塑性屈曲应力计算公式。通过有限元模拟分析并与现有规范相对比,验证了公式的合理性。后根据所推公式得到了梯形波纹和正弦两种波纹钢板避免局部屈曲发生的宽厚比限值。在波纹钢板发生整体屈曲模态的前提下,根据波纹钢板的屈服和整体屈曲发生的先后顺序对波纹钢板进行了分类,并且给出了相应的选型建议。结果表明,所提出的提梯形和正弦形波纹钢板剪力墙的宽厚比限值比平钢板剪力墙中钢板的宽厚比的限值明显更大,但仍然相对保守。

In order to study the shear buckling performance of corrugated steel plate shear walls,according to the existing theoretical basis of orthotropic plates,corrugated steel plates are equivalent to orthotropic plates of the same thickness;The calculation formulas of local buckling stress,interactive buckling stress,global buckling stress and Calculation formula of elastic-plastic buckling stress of steel plate shear wall are summarized and proposed.According to the finite element simulation analysis and compared with the existing specifications,the rationality of the formula is verified.The width to thickness ratio limits of trapezoidal corrugated steel plate and sinusoidal corrugated steel plate to avoid local buckling are obtained.Under the premise that the corrugated steel plate has global buckling mode,the corrugated steel plate is classified according to the yielding of the corrugated steel plate and the sequence of the overall buckling,and the corresponding selection suggestions are given.It is indicated that the width-to-thickness ratio limits of the proposed raised trapezoidal and sinusoidal corrugated steel plate shear walls are significantly larger than those of the steel plates in steel plate shear walls,but are still conservative.