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Seismic Performance of Base Isolated Buildings with Plan Irregularity


Author(s):

Devi Sreenivas , Saintgits College of Engineering, Kottayam, Kerala, India; Ancy Mathew, Saintgits College of Engineering, Kottayam, Kerala, India

Keywords:

Base Isolation, Friction Pendulum System, Re-entrant Corners, Response Spectrum, ETABS

Abstract:

Base isolation is one of the most powerful tools of earthquake resistant design. The concept behind the base isolation technique is to reduce the amount of energy transmitted to the superstructure during an earthquake and thus it has gained increasing acceptance during the last two decades. The past experiences showed that the irregular buildings are more prone to damages when compared with the regular structures. This paper presents a response spectrum analysis performed on two plan irregular r/c building with re-entrant corners using the software ETABS 2015. The main objective here is to study the seismic response control on a structure by providing isolators and comparing between the fixed based and isolated base building. The paper investigates the effectiveness of the rubber isolator against friction pendulum system for various plan irregular building. This paper studies various parameters such as total base shear force, storey acceleration, displacement and time period of a building with respect to the fixed base and isolated base. The study also compares the performance of two irregular buildings with L- shape and plus shape in plan having same area. The study concluded that the addition of isolators reduced the storey drift, acceleration and base shear values. The study indicated that the performance of the plus shaped building is better when compared to the L-shaped building.


Other Details:

Manuscript Id :IJSTEV3I2102
Published in :Volume : 3, Issue : 2
Publication Date: 01/09/2016
Page(s): 271-276
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