Blast and Impact Loading and Response of Structures
Full Session with Abstracts
Steel stud walls are commonly used in office and residential buildings. Current blast-resistant design standards provide detailed provisions to ensure walls can utilize the ductility offered by steel. However, the allowable large inelastic deformations (displacements and rotations) can cause significant damage to non-structural components, which can introduce hazards to building occupants. In an attempt mitigate explosion hazards for existing structures, structural engineers have introduced several retrofits to building components. Limited experimental research has been performed to assess the response of retrofitted steel stud walls. In the current study, two cold-formed steel stud walls were subjected to simulated blast loads using a shock tube. Walls both with and without fiberglass retrofits were tested. To better understand the role played by the retrofit, the displacement time-history for the baseline and retrofitted walls are compared. Test results demonstrate that the fiberglass membrane acted efficiently in reducing debris hazards. Additionally, the research team simulated the response of both walls using a single-degree-of-freedom analysis technique. The simplified computational model was effective in simulating dynamic structural response and in interpreting observed structural behavior. This presentation includes a summary of the experimental testing program and recommendations for modeling these types of wall systems, including retrofits, using a simplified approach. The audience will learn how fiberglass retrofits can be used to effectively mitigate debris hazards for blast-loaded steel stud wall systems.