http://hdl.handle.net/1842/1155 2013-06-13T02:13:26Z 2013-06-13T02:13:26Z Gillie, Martin Usmani, Asif Rotter, J Michael http://hdl.handle.net/1842/1501 2008-11-27T13:38:47Z 2001-01-01T00:00:00Z

Title: Modelling heated composite floor slabs with reference to the Cardington experiments Authors: Gillie, Martin; Usmani, Asif; Rotter, J Michael Abstract: This paper describes a method of modelling composite floor slabs in fire conditions using a stress-resultant approach. The FEAST suite, which consists of two main computer programs is described. The first, SRAS, is designed to model the behaviour of arbitrary orthotropic plate sections at elevated temperatures. The second program, FEAI, interfaces with the finite element package ABAQUS, allowing realistic models of the behaviour of whole structures in fire conditions to be obtained. The paper describes how SRAS was used to analyse the floor slab of the Cardington fire tests and results showing the behaviour of the slab under a variety of loading conditions are presented. The suitability of FEAI as a key component in the analysis of redundant structures under fire conditions is briefly demonstrated.

2001-01-01T00:00:00Z Gillie, Martin Usmani, Asif Rotter, J Michael http://hdl.handle.net/1842/1500 2008-11-27T13:37:53Z 2001-01-01T00:00:00Z

Title: A structural analysis of the first Cardington test Authors: Gillie, Martin; Usmani, Asif; Rotter, J Michael Abstract: This paper presents a finite element analysis of the first Cardington test using shell elements to model the concrete floor slab. The behaviour of these elements is defined using FEAST, a program that allows the behaviour of the shell elements to be defined within the commercial finite element package ABAQUS, using stress-resultants. The model of the test is described and the assumptions that were made are noted and justified. The results of the analysis indicate that the response of the structure is overwhelmingly dominated by the effects of thermal expansion and that material degradation and gravity loading are of secondary importance. It is noted that as a consequence of the rectangular nature of the fire compartment, tensile membrane action occurs from the beginning of the test.

2001-01-01T00:00:00Z Gillie, Martin Usmani, Asif Rotter, J Michael http://hdl.handle.net/1842/1498 2008-11-27T13:38:21Z 2002-01-01T00:00:00Z

Title: A structural analysis of the Cardington British Steel corner test Authors: Gillie, Martin; Usmani, Asif; Rotter, J Michael Abstract: This paper presents a structural analysis of the Cardington British Steel corner test. The test is a analyzes using ABAQUS, the commercial finite element program. The results of the analysis indicate that the response of the structure is dominated by the effects of thermal expansion and that material degradation and gravity loading are of secondary importance until very late in the test. It is noted however that at extreme temperatures a significant load carrying mechanism is tensile action in the reinforcement mesh and that gravity loading can effect the magnitude of the tensile forces produced. The results suggest that one method of helping maintain structural integrity in composite structures during extreme fires is to ensure that a significant amount of ductile reinforcement is present in the concrete floor slabs.

2002-01-01T00:00:00Z