Profiled sheets are widely used in modern steel structures, either as cladding or as casing in composite structures. Strength calculation of such structures is a crucial design issue, and it represents a complex task because one must deal with thin-walled structures that have complicated cross-section shape. Manufacturers of these structural elements provide data about its strength, mostly based on experimental testing. However, catalogues provide little data about the supporting conditions at the ends that may have influence on structural strength. In this research, the finite element method analysis with geometrical and material nonlinearity and contact analysis in the support zones was applied for the strength calculation of a profiled steel sheet with very high depth. The analysis encompassed determination of the ultimate limit strength and serviceability limit strength with limited deflection. All analyses were conducted for surface load applied over the area of one sheet. Thereat, influence of several factors related to support conditions was considered: friction on the supports, support width, and number of fasteners. Failure mechanisms were also analysed. Obtained results were compared with other sources and methods, like analytical solution, manufacturer’s software, and catalogue data. Results of the research showed that behaviour and strength of those elements depend to the great extent on end support detailing, which cannot be encompassed by classical calculation methods and linear analysis. Significance of the support conditions was proven, and attention was paid on absence of such data in published catalogues.

中文翻译：

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非线性有限元分析对支撑条件对单跨型材板材强度的影响

异型板广泛用于现代钢结构中，作为复合结构中的覆层或外壳。这种结构的强度计算是一个至关重要的设计问题，它代表着一项复杂的任务，因为必须处理横截面形状复杂的薄壁结构。这些结构元件的制造商主要根据实验测试来提供有关其强度的数据。但是，目录提供的数据很少，可能会影响结构强度。在这项研究中，将几何和材料非线性的有限元方法分析以及在支撑区域中的接触分析应用于具有很高深度的型材钢板的强度计算。分析包括确定极限挠度的极限强度和使用寿命极限强度。对施加在一张纸区域上的表面载荷进行了所有分析。在那里，考虑了与支撑条件有关的几个因素的影响：支撑上的摩擦，支撑宽度和紧固件的数量。还分析了故障机制。将获得的结果与其他来源和方法进行比较，例如分析解决方案，制造商的软件和目录数据。研究结果表明，这些元素的行为和强度在很大程度上取决于端部支撑细节，而传统的计算方法和线性分析则无法涵盖这些细节。证明了支持条件的重要性，