LAUSR

Abstract This paper conducted nondestructive and destructive fire tests on a full-scale steel truss roof structure. The nondestructive trial fire tests adopted the diesel oil fire to simulate small-size localized fires, and the destructive fire test used wood cribs as the fuel. Test results including the test phenomenon, failure modes, thermal and structural responses, namely the temperature-time and displacement-time curves, were obtained. Small arching deformation was observed in the nondestructive fire tests, but no permanent damage that would influence the structural behavior occurred. After the destructive fire test, the failure modes of the specimen included massive global vertical displacement and buckling of the web members, while no damage of the joints was observed. Before the failure, the specimen presented obvious arching deformation. The homogeneous temperature assumption was conservative in the fire analysis of steel truss structures since the non-uniform temperature distribution existed in all of the tests, which was suggested to be considered by field simulation. The test results will also be a reference for the experimental verification of the fire monitoring system, which will be developed by the authors in the future.