Pushover Analysis of Post-tensioned Flat Slab Building Using Equivalent Frame Method

Abstract: This study presents the seismic capacity of a G+7 office building having post-tensioned flat slab using ETABS. It is possible to estimate the potential of future earthquake losses by predicting the performance of a building. The equivalent frame method for post-tensioned flat slab is used in this parametric study considering IS1893(Part-I):2016, SP 24 and ACI318-17. Linear Static analysis and Response Spectrum analysis are carried out as per Indian code followed by the Pushover analysis. ETABS measures the performance of non-linear hinges. As per ASCE41-13 NSP, it is determined that the base shear values are nearly double and target displacements are half the values of models with URM infill walls compared to without URM infill walls. IO level of M3 hinges is found in the slab-beam. IO, LS and CP levels of P-M2-M3 hinges are found in the columns.

Keywords: Pushover Analysis, Non-linear Static Procedure, Equivalent Frame Method, Equivalent Diagonal Strut Method, Post-tensioned Flat Slab, Office Building, Non-linear hinge, ETABS