The treatment of diverse uncertainties is an important challenge in structural engineering problems, especially from the viewpoint of realistic analysis. Inaccuracy and variability are always present and have to be quantified by either probabilistic, possibilistic, polymorphic or other approaches. Regardless of the applied uncertainty quantification method, the numerical predictions have to be useful for decision making and design. In this contribution, the authors present three individual solutions concerning a benchmark example of a portal frame structure including various uncertainties. A focus is set on the quantification of epistemic uncertainties which differ and influence the obtained decision outcomes. It is proposed to assess the structure conservatively based on a worst case scenario to guarantee the fulfillment of given constraints on the one hand and to compare the individual approaches on the other hand.

尤其是从现实分析的角度来看，处理各种不确定性是结构工程问题中的重要挑战。误差和可变性总是存在的，必须通过概率，可能性，多态或其他方法进行量化。无论采用何种不确定性量化方法，数值预测都必须对决策和设计有用。在这一贡献中，作者提出了三种有关门户框架结构基准示例（包括各种不确定性）的独立解决方案。重点是对认知不确定性的量化，这些不确定性不同并影响所获得的决策结果。