*Proceeding Paper* **Numerical Modelling of Structural Behaviour of Curved Insulating Glass Units †**

**Marcin Kozłowski \* and Kinga Zemła**

Department of Structural Engineering, Silesian University of Technology, Akademicka 5, 44-100 Gliwice, Poland **\*** Correspondence: marcin.kozlowski@polsl.pl

† Presented at the 10th MATBUD'2023 Scientific-Technical Conference "Building Materials Engineering and Innovative Sustainable Materials", Cracow, Poland, 19–21 April 2023.

**Abstract:** The application of curved Insulating Glass Units (IGUs) in facades has emerged as a novel solution to meet aesthetic and energy performance objectives. Due to improved stiffness, curved IGUs cannot equalise internal and atmospheric pressure changes by pillowing, as flat IGUs do. Thus, the climatic loads in curved IGUs may be several times higher than those in flat units. This paper deals with experiments and numerical simulations of cylindrically curved IGUs. It presents the results of an experimental campaign designed to collect data that validate the numerical model of a curved IGU developed within this study. The model is sequentially used to analyse a case study that compares the resulting internal pressure, displacement, and stress in glass in a flat and curved IGU subjected to the characteristic climatic actions given by DIN18008-1.

**Keywords:** insulating glass units; curved glass; internal pressure; climatic load; experiments; numerical simulations
