Samvirkekonstruksjoner av stål og betong i boligbygg : Dimensjonering og modellering med hensyn til preakseptering, Eurokode 4 og numerisk analyse

Abstract

Interaction between steel and concrete, and its effect on moment capacity and flexural stiffness was investigated through the subject BYG507 - Preliminary Project to the Masters Thesis. As a continuation of the preliminary project, this report aims to establish an increased understanding of composite structures, with regards to capacity, modelling and current use. Based on regulations given in Eurocode 4, both pre-accepted and non-pre-accepted composite solutions are considered. The non-pre-accepted solution is based on an actual project; Kanalen Brygge in Tønsberg. This report is based on literature study, calculations and numerical analysis using finite element analysis (FEA). The two considered cross-sections are dimensioned, modelled and assessed according to regulations for pre-acceptation of constructional solutions. By discussions with supervisors combined with studying relevant literature and publications, the research question was defined: How can composite sections for use in residential buildings be dimensioned and modelled with regards to preacceptation, use of Eurocode 4 and numerical analysis? The two composite solutions were dimensioned and modelled with regards to different interaction properties. This enables charting of interaction and the subsequent effect. As expected, the establishment of interaction resulted in increased and improved constructional properties. However,for the non-pre-accepted solution with uncracked concrete, the improved properties were marginal.Interaction resulted in 20 % increased moment capacity and 5 % increased bending stiffness, com-pared to independent materials for the non-pre-accepted solution. With regard to the results, the use of composite structures in residential buildings is considered and discussed. This report is the result of BYG508 - Master’s Thesis at University of Agder and makes up 30ECTS of the spring semester 2021.