Abstract Lightweight roof and wall structural systems are widely used for cladding of steel portal frames. It is a well-known fact, that assembled systems of profiled sheeting and purlins show significant stiffness to in-plane loads, which action is referred to as stressed skin effect. This research aimed to investigate the influencing parameters of stressed skin effect in those nonstandard diaphragm constructions, in which seam fasteners are omitted. The focus of this paper is on the results of an experimental test programme, that investigated the stiffness of nonstandard, 3.00 × 3.00 m sized diaphragm configurations for in-plane static load. The experimental results are compared against analytical results derived from calculated shear flexibilities according to current ECCS formulae. Upon experimental test results, a verified and validated numerical model is developed, and the range of experimental tests is extended by numerical simulations. The conclusions of numerical analyses demonstrated, that the effect of purlin section height and thickness is not followed by current ECCS provisions. The intended purpose of the research is to develop the current ECCS stressed skin design formulae to incorporate nonstandard diaphragm constructions, which are commonly used in industrial practice in Europe. The innovative feature of formulae improvement is to comprise the effect of those parameters, which are influencing shear flexibility and are not addressed in the current ECCS design methodology. Upon experimental, analytical and numerical results a modification is presented to current formulae of shear flexibility, which gives a better approach in nonstandard cases.

中文翻译：

---

基于实验和数值模拟的应力蒙皮设计程序的改进

摘要 轻型屋盖和墙体结构体系广泛用于钢门式框架的包覆。众所周知的事实是，异型板和檩条的组装系统对面内载荷表现出显着的刚度，这种作用被称为受力集肤效应。本研究旨在研究那些省略了接缝紧固件的非标准隔膜结构中应力集肤效应的影响参数。本文的重点是一个实验测试程序的结果，该程序研究了非标准、3.00 × 3.00 m 尺寸的隔膜配置在平面内静载荷下的刚度。将实验结果与根据当前 ECCS 公式计算的剪切柔度得出的分析结果进行比较。根据实验测试结果，开发了经过验证和验证的数值模型，并通过数值模拟扩展了实验测试的范围。数值分析的结论表明，当前 ECCS 规定并未遵循檩条截面高度和厚度的影响。该研究的预期目的是开发当前的 ECCS 受压蒙皮设计公式，以纳入欧洲工业实践中常用的非标准隔膜结构。公式改进的创新特征是包含那些影响剪切柔韧性的参数的影响，并且在当前的 ECCS 设计方法中没有解决。根据实验、分析和数值结果，对当前的剪切柔度公式进行了修改，这在非标准情况下提供了更好的方法。