(1 东南大学土木工程学院，南京 210096； 2 上海博壹建筑科技有限公司，上海 201206)

［摘要］在蒙皮体的各种破坏形式中，整体剪切屈曲破坏是具有控制作用的破坏形式之一。对目前国内常用的YX20-166-830型压型钢板组成的6个不同边界连接的蒙皮板进行了抗剪试验研究，探讨边界连接形式对整体屈曲荷载的影响。在试验的基础上进行了有限元分析，将试验结果、有限元计算结果和理论结果进行了比较。屈曲荷载的试验值与有限元计算值相差较小，可见有限元计算模型可以作为进行蒙皮体抗剪性能分析的辅助手段。另外，通过屈曲荷载的试验值和简化公式值比较，得到了边界连接形式对整体屈曲荷载的影响，进一步完善了蒙皮板整体剪切屈曲的计算公式。

［关键词］蒙皮板；整体剪切屈曲；连接形式；屈曲荷载；有限元分析

Experiment and finite element analysis on overall shear buckling  performance of stressed skin diaphragms

Guo Jing1, Shan Jian1, Yang Xiaodong2(1 College of Civil Engineering, Southeast University, Nanjing 210096, China; 2 Shanghai Boyi Construction Technology Co., Ltd., Shanghai 201206, China)

Abstract:Overall shear buckling is one of decisive failure modes of skin diaphragms. Experimental investigation in six skin diaphragms under shearing loading was carried out, in which the diaphragms are made of common YX20-166-830 profiled steel sheeting, with different boundary attachments. The influence of boundary condition on overall buckling strength is discussed. Based on experiment, finite element analysis is performed, the corresponding results are compared. Difference between experimental values and finite element values concerning overall buckling strength is little, and finite element models can be adopted as an accessorial method in analysis of the shear behavior of skin diaphragms. In addition, influences of boundary attachments on overall buckling strength are presented through comparisons between experimental values and simplified equation values concerning overall buckling strength, and the equation on overall shear buckling of skin diaphragms is supplied.

Keywords:stressed skin diaphragms; overall shear buckling; modes of boundary attachment; buckling strength; FEA

作者简介：郭静，博士研究生，Email:guojingsoutheast@163.com。

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