Progressive collapse mitigation in flat-slab buildings

Abstract

This paper discusses challenges and proposes solutions in relation to progressive collapse mitigation in flat slab systems. Traditional flat slab floor systems gained increased popularity in many parts of the world as a result of the ease of construction which translates into construction cost saving. However, flat slab floor systems are particularly vulnerable to progressive collapse if appropriate precautions are not taken during the design. Design approaches addressed in this paper include; alternate path (AP), tie force (TF), and enhanced local resistance (ELR). This paper advocates the use of an effective system of reinforcement ties that has the ability to develop catenary action in flat slabs and transfer the redistributed forces through vertical members to the ground. © Civil-Comp Press, 2012.

Keywords: Progressive Collapse, Catenary Action, Structural Ties, Punching Shear, Flat Slab.