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Seismic Behavior of Structures with Different Diaphragms and Infill Walls


Author(s):

Onkar Ashok Chavan , MGM’s College of Engineering and Technology ; V. G. Sayagavi, MGM’s College of Engineering and Technology ; N. G. Gore, MGM’s College of Engineering and Technology ; P. J. Salunke, MGM’s College of Engineering and Technology

Keywords:

Bare Frame, Infill Frame, Base Shear, Nonlinearity, Displacement, Storey Drift, Plastic Hinges and Diaphragms

Abstract:

In the present study, using nonlinear static (push over) analysis an investigation has been carried out to examine the behavior of an existing RC frame structure located in moderate seismic zone (zone-III) of India and designed as per IS code 1893-2002 part I with different diaphragms with and without infills. Slabs are modeled as shell element, membrane with rigid diaphragms, membrane with semi rigid diaphragms and without any diaphragms. Infills were modeled using equivalent strut approach. Nonlinear static (pushover) analysis were carried out considering static earthquake load as per IS1893-2002(part-I), loads from predominant modes of vibration in both longitudinal and transverse direction using ETABS 9.7.2. Results in terms of pushover curve, capacity spectrum and performance points are tabulated for the each models and comparison has been done to evaluate the performance of the structure with different diaphragms and also performance difference with and without considering the stiffness of infills with different diaphragms. Results indicate that infill frame with different diaphragms is showing high performance in terms of base shear than the bare frame with different diaphragms. But bare frames are showing very good ductile behavior than the infill frame which is suffering from brittle failure due to the failure of open ground floor columns.


Other Details:

Manuscript Id :IJSTEV3I12020
Published in :Volume : 3, Issue : 12
Publication Date: 01/07/2017
Page(s): 36-41
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