FEM analysis on behavior of high strength steel endplate connections in fire

Abstract:

In order to obtain the behavior of high strength steel endplate connections in fire, full-scale tests on 7 joints were conducted at elevated temperature 550℃. Based on the test results, a FEM analysis on high strength steel endplate connections under fire conditions was carried out by ABAQUS. Details of the numerical modelling, such as mesh generation, element type, contact interaction, analysis process and failure criterion based on deformation, are presented. Herein the moment–rotation relationship, failure mode and stress state as well as yield line pattern of high strength endplate connections both at ambient temperature and in fire are revealed. Besides, the validations of the numerical modelling against all representative experimental results show that good agreements exist.