Civil and Environmental Engineering Department Seminar: Fire Performance of Simple (Shear) Connections in Steel-Frame Buildings

Seminar | March 10 | 12-1 p.m. | 542 Davis Hall

 Erica Fischer

 Civil and Environmental Engineering (CEE)

A building’s resistance to fire is the ability of the structure to withstand a combination of gravity loads and the induced thermal loads without undergoing failure either during the heating or cooling phases of the fire. Many researchers internationally have investigated the performance of steel-frame buildings in fire. However, few of them have examined U.S. building construction practices. This presentation will focus on the thermal and structural behavior of simple (shear) connections used in steel-frame buildings through experimental and numerical investigations. The experimental approach included the use of high-temperature ceramic fiber radiant heaters, vertical loading, and advanced thermal instrumentation. Sequentially-coupled thermal-structural 3D finite element models were developed to evaluate both the thermal and structural response of composite beams with simple connections. The thermal and structural behavior of simple connections was evaluated as an isolated connection, as a part of a one-bay composite beam, three-bay composite beam, and as a part of a full ten-story office building. The results were compared with simplified methodologies developed by previous researchers to provide a simple design method without having to perform extensive thermal and structural analyses.