Chen CK, Zhang D, Zhang W, Shen BY (2012) Experimental Behaviors of Steel Staggered-truss System Exposed to Fire under Lateral Force. International Journal Of Steel Structures 12(1), 59-70. [In English]
Web link: http://dx.doi.org/10.1007/s13296-012-1006-1
Keywords: steel staggered-truss; fire; lateral force; experimental study; column
Abstract: This paper presents an experimental investigation on structural behaviors of a six-storey steel staggered-truss system model with a scale of 1/10 under lateral force and fire exposure. Pan fire with the fuel of methanol was used to simulate a natural fire. The vertical and lateral loads were applied to tested model using counterweights. Temperatures, deformations and strains of the structure were measured. And probable failure mode of the system was obtained. The results indicate that it is hard to predict the failure of components in fire purely according to the load design of the structure at ambient temperature, due to the complicated redistribution of the internal force and the non-uniform temperature distribution. The mid-span of the top chord and the vertical web members at the center panel at the fire storey presented an obvious deformation during the test, while the components in the truss show a good compatibility. The impact of high temperature on lateral stiffness of the structure mainly concentrated on the storey exposed to fire, but rarely on the adjacent truss and the storey not exposed to fire.