Author:
Tafheem Z.,Arafat T. A.,Chowdhury A.,Iqbal A.
Abstract
This study investigates the effect of base isolator on the structural responses of multistoried reinforced concrete building under time history earthquake loading. In the present study, six-storied reinforced concrete buildings with both conventional and isolated bases have been modeled. Conventional building has been modeled with fixed support whereas base-isolated building has been modeled incorporating rubber bearing near the base of all columns. Modal analysis has been performed to get an idea of possible mode shapes of the building. After that time history analysis has been performed in order to investigate the effect of seismic loading on the building structure with respect to time. The structural responses of time history analysis such as time period of different modes, storey displacements, storey acceleration, and base shear have been obtained from both conventional and base-isolated buildings. Finally, a comparative study of structural responses has been carried out between those two structures. It has been found that fundamental time period of base-isolated building is increased by 28% compared to conventional building. Moreover, base shear value of the base-isolated structure is reduced by 69% and top storey acceleration is decreased by 75% compared to conventional building. This study reveals that isolation system reduces seismic responses significantly.
Reference20 articles.
1. [1] T.A. Arafat, A. Chowdhury, and S.M.A. Iqbal, 2015, The effect of base isolator on RC multistored building structure under seismic loading, B.Sc. Thesis, Department of Civil Engineering, Ahsanullah University of Science and Technology, Dhaka, Bangladesh.
2. [2] Z. Tafheem, T. Ahmed, A. Chowdhury and A. Iqbal, Seismic isolation systems in structures- the state of art review, 11th Global Engineering, Science and Technology Conference, Dhaka, Bangladesh, Dec 2015.
3. [3] I. G. Buckle, Passive control of structures for seismic loads, 12th World conference on earthquake engineering, 2000.
4. [4] F. Naeim, and J.M. Kelly, 1999, Design of seismic isolated structures: from theory to practice, John Wiley and Sons, Inc. Design issues for base-isolated bridges: The 1997 Revised.
5. [5] M Y. Nakamura, M. Saruta, A. Wada, T. Takeuchi, S. Hikone, and T. Takahashi, 2011, Development of the core-suspended isolation system, Earthquake Engineering and Structural Dynamics, pp. 429-447.
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献