Utjecaj načina modeliranja priključka na odgovor konstrukcije višekatnog čeličnog okvira

The stiffness of the joint is essential for the distribution of internal forces and bending moments in structural elements as well as global behaviour of the structure. Hence, this paper focuses on different joint modelling strategies based on the steel multistorey frame structure. Three different modelling assumptions for the beam-column joint are analysed. The first model is based on axial modelling. This is the simplest model and is often used in practice. The second model uses rigid links that allow for actual column and beam lengths to be considered. The last model considered is the Krawinkler model. It is the most complex and comprehensive because it considers the stiffness of the joint as well as the stiffness of the column web panel. All three models are explained in more detail in the theoretical part of the paper. Effect of these models on the stability of the structure, i.e. on the sensitivity to the second-order effects in case of static (αcr) and dynamic analysis (Θ) has been observed. The parametric study is performed for two 8-storey steel frame structures. In the first step structures were designed in accordance with European standards. Based on the obtained results, conclusions were drawn alongside with useful guidelines for future research.