EFFECT OF AXIAL RESTRAINTS TO BEAMS ON THE BEHAVIOUR OF A BOLTED COMPOSITE STEEL-CONCRETE JOINT UNDER A LOCALISED FIRE

摘要

This paper focuses on the joint behaviour study from a composite steel-concrete open car park building subject to fire.Experimental tests to simulate the loss of a column due to a localised fire were undertaken at the University of Coimbra, Portugal [1], and the composite steel-concrete beam-to-column joint was studied in detail.This paper corresponds to the ongoing work within the IMPACTFIRE project.FEM models of the beam-to-column joint subject to the loss of the column due to a localised fire are developed in Abaqus and calibrated against the tests.Following, these FEM models are uzed to evaluate the influence of the beam axial restraint coming from the unaffected part of the building.The results are compared with the M-N interaction curves provided by the analytical methodologydeveloped at the University of Liège [2].