蒙皮板整体剪切屈曲分析

ANALYSIS OF OVERALL SHEAR BUCKLING OF SKIN DIAPHRAGMS

随着蒙皮板与周边构件连接的加强以及复合楼板或复合墙体中压型钢板的使用,蒙皮板在面内剪力作用下的整体屈曲有可能成为控制破坏形式。另外,目前很少有研究者对多种边界条件下蒙皮板的整体屈曲问题进行系统的研究。利用有限元方法对至少每波相连的蒙皮板的弹性屈曲进行分析,分别考虑了压型钢板的截面形状、波高和钢板厚度对整体屈曲性能的影响;采用矩形截面的压型钢板对常见的焊接和自攻螺丝连接形式包括点焊、槽焊、波谷连续施焊、波峰自攻螺丝连接、波谷自攻螺丝连接以及波峰波谷自攻螺丝连接在不同的波高和波距影响下的整体屈曲进行考察,并对简化公式的应用予以探讨,给出小波距低波板的建议边界影响系数。

Along with the enhancement of connections of shear diaphragms and use of profiled steel sheetings in composite flooring systems or composite walling systems, it is possible that overall buckling under in-plane shear concerning profiled steel sheetings governs failure of skin diaphragms. Moreover, at present few researchers have studied systematically on overall buckling of skin diaphragms with different boundary conditions. Elastic buckling on skin diaphragms is discussed by finite element method, these factors are considered including cross-section shape, height and thickness of profiled steel sheetings,, which influence overall buckling performances of skin diaphragms; profiled steel sheetings with rectangular section are taken as examples, influences of factors are considered such as height, thickness, the modes of attachment including dot weld, slot weld, continuous weld along every trough, a fastener in every crest, a fastener in every trough and fasteners in both every crest and every trough. The application concerning simplified expressions is investigated, boundary coefficient is given concerning low sheetings with small dimension of one repeating corrugation.