Comparative and parametric study of base isolated structure

Comparative and parametric study of base isolated structure

  • Smita Gupta Chhattisgarh Swami Vivekanand Technical University, Newai
Keywords: Interstorey Drifts, Seismic Response, Fixed-Base and Base Isolated Structure, Design Approach

Abstract

For the development of better design approach to protect the structures from earthquake damage, base isolation, to reduce the seismic energy impacting on the structure has represented a change of paradigm since it came into the fore. Base isolation technique is most suitable for high rise building, the concept of base isolation is simple, it modifies the response of the building so that the ground can move below the structure without transmitting these motion into the building, seeing the growth of such technology it became necessary to asses the general and seismic response of such structure. The present study focuses on the comparative performance of two frame of different material properties consisting base isolator, which is performed under seismic condition. The base isolation system that is utilized is composed of  Rubber isolators. To reach the understanding of this  fixed-base and base  isolated structure the seismic analysis have performed on two types of structure and the responses are calculated considering different seismic zone. Thus, this paper aimed to compare the responses of simple rcc structure and steel structure due to Indian loadings and seismic zone variations Additionally  the structures are analysed and compared using elcentro earthquake data for assement of responses like interstorey drifts, displacement and base shear.

 

References

[1] Kalantari, S.M., Naderpour, H. and Vaez, S.H., 2008. Investigation of Base-isolator type selection on seismic behavior of structures including story drifts and plastic hinge formation. In The 14th World Conference on Earthquake Engineering, Beijing, China..
[2] Mazza, Fabio, and Alfonso Vulcano. "Base-Isolation techniques for the seismic protection of RC Framed Structures subjected to near-fault ground motions." 13th WCEE. 2004.
[3] Matsagar, V. A., & Jangid, R. S. (2003). Seismic response of base-isolated structures during impact with adjacent structures. Engineering Structures, 25(10), 1311-1323.
[4] Palermo, M., Ricci, I., Gagliardi, S., Silvestri, S., Trombetti, T., & Gasparini, G. (2014). Multi-performance seismic design through an enhanced first-storey isolation system. Engineering structures, 59, 495-506.
[5] Providakis, C. P. (2008). Pushover analysis of base-isolated steel–concrete composite structures under near-fault excitations. Soil dynamics and earthquake Engineering, 28(4), 293-304..
[6] Su, L., Ahmadi, G. and Tadjbakhsh, I.G., 1990. Responses of base-isolated shear beam structures to random excitations. Probabilistic Engineering Mechanics, 5(1), pp.35-46.
[7] Kilar, Vojko, et al. (2011) "Seismic analysis of an asymmetric fixed base and base-isolated high-rack steel structure." Engineering Structures 33.12: 3471-3482.
[8] IS 456-2000, Guidelines for Indian Standard Plain and Reinforcing concrete code of practices.
[9] IS 1893: 2002 Criteria For Earthquake Resistant Design of Structures.
[10] IS: 800 – 2007 Indian Standard General Construction In Steel – Code of Practice.
Published
2019-07-29
Section
Articles