Affiliations: Department of Civil Engineering, Manhattan College, Riverdale, NY, USA
Corresponding author. N.L. Braxtan, Department of Civil Engineering, Manhattan College, Riverdale, NY, USA. Tel.: +718 862 7176; Fax: +718 862 8035; [email protected]
Abstract: In the New York Metropolitan area, steel box girders are commonly constructed from weathering steel, which has little available research into their performance in fire. This paper will discuss the current literature, challenges, and available verification studies for this particular combination of cross section and material properties. In addition, preliminary results of a composite weathering steel straight box girder bridge in fire will be presented. Results show large deflections in the steel box girder as the temperature of the steel increases over the duration of the fire. Temperatures of the steel tub increase rapidly due to the low weight-to-heated perimeter ratio of the thin members. The concrete slab does not exhibit significant increase in temperature from the fire below. It was assumed that composite action is retained between the steel tub girder and concrete slab.