Seismic Retrofitting of Floating Column Building with Fluid Viscous Dampers and Structural Bracings by using Fast Non-linear Time History Analysis

Open Access

Year : 2023 | Volume :8 | Issue : 2 | Page : 1-17
By

    Shrihari Bhausaheb Kedar

  1. S.N. Deshmukh

  1. M.tech Student, Government College of Engineering, Aurangabad, Maharashtra, India
  2. Professor, Government College of Engineering, Aurangabad, Maharashtra, India

Abstract

In some of the building structures, even in the newly constructed one, floating columns are used to achieve an aesthetic view or to satisfy the space requirement criteria of building areas like reception lobbies, parking spaces, conference rooms in malls etc. With the use of proper design considerations, buildings built with floating columns, which otherwise are not advised by the codes, can withstand vertical loads, i.e., gravity loads and live loads, and to certain extent may withstand the small-scale earthquake loads. However, due to vertical irregularity, that is discontinuity in load transfer from floating columns, it is more vulnerable to the earthquake loads, sometimes even to small-scale earthquakes and can lead to increased structural responses and corresponding forces in the structure. For this purpose, the response of the building can be decreased by using a seismic retrofitting technique to increase the overall performance of the building. G+9 residential floating column building is analyzed in the present study by using dynamic analysis. Arrangements are done in such a manner that use of only dampers, only bracings, a combination of both dampers and bracings as in Type 1, Type 2, Type 3, and Type 4 arrangements respectively, are considered. Location of dampers and bracings are fixed at successive and alternative floors corresponding to the height of the structure to overcome the best result in seismic retrofitting of the structure. Such arrangements are analyzed and studied by using fast non-linear time history analysis with an El Centro earthquake in ETABS v 2018. With the use of the performance controllability index, optimization of location and number of dampers can be found out using root mean square values of inter storied drifts. It can be seen that the Type 4 arrangement is quite effective arrangement to increase the overall performance of the structure with economic considerations.

Keywords: Floating column building, hydraulic dampers, seismic retrofitting, Split-X bracings

[This article belongs to Journal of Offshore Structure and Technology(joost)]

How to cite this article: Shrihari Bhausaheb Kedar, S.N. Deshmukh , Seismic Retrofitting of Floating Column Building with Fluid Viscous Dampers and Structural Bracings by using Fast Non-linear Time History Analysis joost 2023; 8:1-17
How to cite this URL: Shrihari Bhausaheb Kedar, S.N. Deshmukh , Seismic Retrofitting of Floating Column Building with Fluid Viscous Dampers and Structural Bracings by using Fast Non-linear Time History Analysis joost 2023 {cited 2023 Jan 15};8:1-17. Available from: https://journals.stmjournals.com/joost/article=2023/view=90607

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References

1. Patil VB, Jangid RS. Response of wind excited benchmark building installed with dampers. Struct Design Tall Spec Build. 2011;20(4):497-514. doi: 10.1002/tal.523.
2. Scheaua F, Axinti G. ’Seismic protection of structures using hydraulic damper devices. The Analsof “Dunarea de Jos” University of Galati, facicle xiv; 2010.
3. Javier Lopez Gimenez, et al. ’Seismic retrofit of buildings with dampers: the Japanese approach’, Structural engineering for infrastructure resilience; 2019.
4. Sasidhar T, et al. Analysis of multistoried building with and without floating column using Tabs.Vol. 8(6); 2017. p. 91-8.
5. Agrawal Vinay, et al. Seismic retrofitting of RC buildings with soft story and floating columns. Int Sch Sci Res Innov. 2016;10(12).
6. Raghvendra Allacheruvu, et al. Comparative seismic study on strengthening of floating column building using bracings. Int J Adv Mech Civ Eng. 2016;3(5).
7. Sunil SK, et al. Seismic evaluation of multistory building using E-Tabs. Int Res J Eng Technol. 2017;4(8).
8. Sabouri-Ghomi S, Ebadi P. Concept improvement of behavior of X-bracing systems by using Easy-Going Steel. The 14th World conference on Earthquake Engineering, Oct 12-17, 2008, Beijing, China.
9. Ghosh A, et al. Performance evaluation of RC buildings by Time history analysis. Proceedings of the on International conference on Disaster Risk Management, Dhaka, Bangladesh; January 12- 14, 2019.
10. Nayel Israa H, et al. The effect of shear wall locations in RC multistory building with floating column subjected to seismic loading. Int J Civ Eng Technol. 2018;9(7):642-51.
11. Chopra Anil K. Dynamics of structures-Theory and applications to Earthquake engineering, Simon & Schuster (Asia) Pte Ltd.; 1997.
12. IS: 1893-2016. Criteria for Earthquake resistant design of structures, Part 1: General provisions and buildings, Bureau of Indian Standards.


Regular Issue Open Access Article
Volume 8
Issue 2
Received August 10, 2021
Accepted August 15, 2021
Published January 15, 2023