Böjknäckning och utböjning av VKR-profiler

• Main Authors: Ahmed, Mustafa, Barka, Khaldoon
• Format: Others
• Language: Swedish
• Published: KTH, Bro- och stålbyggnad 2020
• Subjects: VKR/KKR-Profiles; buckling; column buckling; deflection; bendingcracking; windload; Eurokod; Abaqus; Excel; Mathcad; FE-analysis; Engineering and Technology; Teknik och teknologier
• Online Access: http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-281440

This work has been done in collaboration with Northpower Stålhallar AB. The work is concentrating on column buckling, wind load and deflection of steel columns made of VKR profiles. VKR profiles are steel profiles that are hot-rolled structural pipes having a rectangular section. The analysis is made according to Eurokod 3 and with the finite element program Abaqus. A comparison has been made between these to see whether they differ in result or not regarding buckling curves and interaction formulas. In addition, the company wanted calculation templates in Excel. A proposal for a spreadsheet for different deflection limits are presented in Excel that the company can use, as well as a calculation template for wind loads where all municipalities in Sweden are included. The report contains theoretical background on how to design columns with respect to buckling, wind loading and deflection according to Eurokod 3.The work with Abaqus includes linear and non-linear analysis of column buckling. The analyses also include geometric imperfections, residual stresses, and plastic behavior of steel. The result showed a slight difference between Eurokod and Abaqus analyses but it was not a considerable deviation.