Evaluation of Seismic Performance of Re-entrant Cornered Buildings with Base Isolators

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:

During earthquakes, the strain energy released imparts lateral forces to the buildings and hence the buildings need to be designed to withstand these forces. Thus earthquake resistant design became an important area of concern. The conventional method was to make a structure stiffer but since a few decades the concept of the base isolation techniques has been in practise. The studies on the seismic behaviour of buildings showed that the buildings with asymmetry have more chance to get collapsed during an earthquake. This paper presents a study on the seismic response of various plan irregular buildings under different base isolation techniques by carrying out a response spectrum analysis on the building models using ETABS 2015. 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 (friction pendulum and lead rubber bearing isolator). The study also compares the performance of three irregular buildings with L- shape, T- shape and plus shape in plan with same area. The study concluded that the incorporation of isolator mechanism reduced the storey drift, acceleration and base shear values. The study indicated that the plus shaped building offers better performance when compared to the other models.

Other Details:

Manuscript Id	:	IJSTEV3I3042
Published in	:	Volume : 3, Issue : 3
Publication Date	:	01/10/2016
Page(s)	:	117-122

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