Research Progress on Fire Resistance of Steel-concrete Composite Structures

Abstract

The 1930s was an important period of development in the design theory of bridge technology in Europe and the United States. Among them was the invention of welding technology, which created more favorable conditions for the development of combined structures, i.e., the connection between reinforced concrete slabs and steel girders could be welded instead of the initial connection method. In China, for more than thirty years, on the one hand, large span bridges have been able to develop rapidly and set new world records, driven by the huge technical demand seeking span breakthroughs. On the other hand, concrete bridges dominate the large number of small span bridges. In short, in China, steel-concrete (SC) structures have also developed accordingly. This paper first introduces the steel-concrete combination structure, and then analyzes the steel-ability concretes to withstand fire from both theoretical and experimental perspectives. Valid data are provided by graphs and equation analysis. Finally, a method that can measure the fire resistance of SC composite structures in fire is obtained.