Study on the Behaviour of Various Types of Prestressed Flat Slab Under Single Storey Frame with and Without Braces Under Seismic Effects

Abstract

AbstractIn the present scenario with the booming of construction industries, the study on the various structural behavior of structural components is an important criterion that has to be taken into considerations during the analysis and design process. Flat slabs are the vertical load resisting members that has various advantages compared to the conventional slab system. It reduces the storey heights and hence conservatively increase the total number of floors. In comparison to conventional slab 70% of the cost saving is done in case of Flat slabs and 50% cost saving in case of formwork. Due to the controversy that the flat slab system is least resistant to seismic forces, there is a need to study flat slab with bracing and flat slab without bracing. The analysis was carried out using Abaqus software for both static and dynamic cases. The structure is modeled for linear static and non-linear dynamic analysis under prestressing forces. The analysis was carried out manually using Load balancing principle and Equivalent frame method. The structure was modelled and analyzed using Abaqus software. The analysis results stated that, though the stresses and the displacement in the flat slab with braces are reduced considerably than that for flat slab without braces, the stresses and displacement produced are within the limits for the loading considered. Hence, in this case considered for warehouse building and for the considered loading conditions the stresses and displacement are within the limits for both cases. The stresses and displacement are within the limits and safe against lateral forces. The overall preference in the flat slab element leads to optimum design.KeywordsPrestressed flat slabIn-plane behaviorSingle-storey frameStatic analysisDynamic analysisValidation