Performance of Composite Beams in Fire: Pre-test Analysis of Full-scale Experiments

Published

July 23, 2017

Author(s)

Joseph Main, Fahim H. Sadek, Jonathan Weigand, Jian Jiang, Lisa Choe, Selvarajah Ramesh, Matthew Hoehler, John L. Gross

Abstract

This paper presents results from pre-test analysis of a full-scale 42 ft (12.8 m) span composite beam with bolted angle connections, under uniform gravity loading simulated using six equally spaced concentrated loads, and subjected to a 4000 kW compartment fire followed by a period of cooling. This configuration corresponds to the first in a series of composite beam fire tests to be performed in the National Fire Research Laboratory, with varying steel gravity connection types and slab-edge fixities. The beam, connections, and composite slab are modeled using a reduced-order shell-element-based modeling approach that enables coupled thermal-structural analysis by using the same finite element mesh for the heat transfer and structural analyses. This approach includes (i) realistic fire-induced thermal loads, (ii) temperature-dependent thermal and mechanical material properties, (iii) layered shell elements for the framing members and connections, and (iv) a newly developed reduced-order modeling approach for the composite slab on steel deck.

Proceedings Title

Eighth Composite Construction in Steel and Concrete (CCVIII), 2017

Conference Dates

July 23-26, 2017

Conference Location

Jackson Hole, WY, US

Pub Type

Conferences

Keywords

composite slab, Experiments, fire performance of structures, heat transfer, National Fire Research Laboratory, pre-test analysis

Citation

Main, J. , Sadek, F. , Weigand, J. , Jiang, J. , Choe, L. , Ramesh, S. , Hoehler, M. and Gross, J. (2017), Performance of Composite Beams in Fire: Pre-test Analysis of Full-scale Experiments, Eighth Composite Construction in Steel and Concrete (CCVIII), 2017, Jackson Hole, WY, US (Accessed June 1, 2024)