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Compressive buckling behaviour of steel corrugated-plates in contact with a rigid medium

机译：钢瓦楞纸板与刚性介质接触的压缩屈曲行为

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摘要

In composite structures, the strength of different material can be fully taken advantage of due to the composite effect. In steel-encased concrete-infilled composite structures, steel plates are restrained unilaterally by infilled concrete. The contact buckling mode of steel plates differs from the bilateral buckling mode, and the buckling load is improved. Compared with flat-plates, corrugated-plates have greater out-of-plane stiffness and even larger buckling load restrained by a rigid medium and the shear connectors between them. This paper focuses on the compressive buckling behaviour of corrugated-plates in contact with a rigid medium, taking into consideration the influences of geometrical parameters and shear connector arrangement. First, through finite element (FE) analysis and theoretical derivation, we propose the bilateral and contact buckling loads of corrugated plates. Then, based on the buckling analysis, the FE model considering material and geometrical nonlinearity is developed to investigate the load resistance of corrugated-plates and validated by existing experimental results. According to the numerical results, we propose the design formulas of the strength reduction factor of corrugated-plates and the upper limit of the normalized slenderness ratio for compact sections. The design formulas can further provide fundamental for the stability design of corrugated-plates under compression and bending moment.
机译：在复合结构中，由于复合效应，可以充分利用不同材料的强度。在钢包装的混凝土含量的复合结构中，钢板通过流产混凝土抑制单侧。钢板的接触屈曲模式与双侧屈曲模式不同，并且提高了屈曲负荷。与平板相比，波纹板具有更大的平面外刚度，并且甚至通过刚性介质和它们之间的剪切连接器抑制的较大屈曲负荷。考虑到几何参数和剪切连接器装置的影响，本文侧重于与刚性介质接触的波纹板的压缩屈曲行为。首先，通过有限元（FE）分析和理论推导，我们提出了双边和接触瓦楞板的屈曲负荷。然后，基于屈曲分析，开发了考虑材料和几何非线性的Fe模型，以研究瓦楞纸板的负载性并通过现有的实验结果验证。根据数值结果，我们提出了瓦楞纸板强度缩减因子的设计公式，以及紧凑型剖面的归一化细长比的上限。在压缩和弯矩下，设计公式可以进一步为瓦楞纸板的稳定性设计提供基础。

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