Effect of Seismic Retrofitting on R.C. Building with Soft Storey and Floating Column
Citation
Rahul Kapase, Mukund Pawar, M.M. Deshmukh, S.B.Talavara "Effect of Seismic Retrofitting on R.C. Building with Soft Storey and Floating Column", International Journal of Engineering Trends and Technology (IJETT), V46(7),367-371 April 2017. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group
Abstract
The objective of this study is to identify an
efficient retrofitting method for existing open ground
story reinforced concrete frame buildings. This soft
storey creates a major weak point in an earthquake.
Since soft stories are classically associated with
retail spaces and parking garages, they are often on
the lower stories of a building, which means that
when they collapse, they can take the whole building
down with them, causing serious structural damage
which may render the structure totally unusable. we
are dealing with the comparative study of seismic
analysis of multi-storied building with and without
floating columns. The analysis is done with
Response Spectrum Analysis, as per IS:1893-2002.
Various features of lateral stiffness strengthening
system, namely lateral bracings, shear walls,
increasing the column size in the soft ground storey.
the entire project is done with ETABS 3D model and
the comparison of these models are been presented
with their combinations, and are proposed to reduce
the stiffness irregularity and discontinuity in the
load path incorporated by the soft ground storey and
the floating columns respectively. The results are
plotted for both the frames with and without floating
column by comparing each other in terms of Story
shear, story displacement, story drift and time
period.
References
1) L. Teresa Guevara-Perez(2013), “Soft Story” and “Weak
Story” in Earthquake Resistant Design: A Multidisciplinary
Approach.” Universidad Central de Venezuela, Caracas.
2) Srikanth.M.K Yogeendra.R. Holebagilu (2014), “Seismic
response of complex buildings with floating column for
zone ii and zone v” ISSN 2348-7607 (Online) Vol. 2, Issue
2, pp: (12-23), Month: October 2014 - March 2015.
3) Mr. P.V. Prasad and T.RajaSekhar(2014), “Study of
Behaviour of Seismic Analysis of Multi Storied building
with and without floating column” T.Raja Sekhar et al,
Carib.j.SciTech, 2014, Vol2, 697-710
4) Prof. Pravin B. Waghmare(2011), “A comparative study of
retrofitting of R.C. building using Steel bracing and Infill
wall” IJAERS/Vol. I/ Issue I/October-December, 2011/20-
23.
5) Umesh P. Patil and Shivanand S Hallur2 ( 2015), “Seismic
Analysis of G+5 framed Structures with and Without
Floating Columns Using ETABS-2013 Software” IRJET
,Volume: 02 Issue: 04 July-2015.
6) A. B. M. Saiful Islam, Mohammed Jameel (2011),“Study
on corollary of seismic base isolation system on buildings
with soft storey.” International Journal of the Physical
Sciences Vol. 6(11), pp. 2654-2661, 4 June, 2011.
7) A.P. Mundada and S.G. Sawdatkar (2014), “Comparative
seismic analysis of multi-storey building with and without
floating column” E-ISSN 2277 – 4106, P-ISSN 2347–
516,Vol.4, No.5 (Oct 2014.
8) Sabari S, Mr.Praveen J.V(2014), “Seismic Analysis of
Multistory Building with Floating Column” ISSN 2348-
7607 (Online) Vol. 2, Issue 2, pp: (12-23), Month: October
2014 - March 2015.
9) Hiroshi Komoto, Tatsuo Kojima, Yoshinori Mase,
Wen(2004), “Case Study On The Soft-First-Story Buildings
Strengthened By Confined Concrete Columns” 13th World
Conference on Earthquake Engineering Vancouver, B.C.,
Canada August 1-6, 2004 Paper No. 654.
10) Krishnaraj R. Chavan, H.S.Jadhav(2014), “Seismic
Response of R C Building With Different Arrangement of
Steel Bracing System” ISSN : 2248-9622, Vol. 4, Issue 7(
Version 3), July 2014, pp.218-222.
11) Badgire Udhav S., Shaikh A.N., Maske Ravi G. (2015),
“Analysis of Multistorey Building with Floating Column”
Volume No.4, Issue No.9, pp : 475-478, ISSN:2319-
6890)(online),2347-5013(print) ,Sept. 2015.
12) Prof. Rekha Shinde Prof. Mukesh Shinde(2014),
“Performance Based Seismic Analysis of a Building with
Soft Storey” Volume 1, Issue 3, August 2014.
13) Dr. Saraswati Setia and Vineet Sharma(2012), “Seismic
Response of R.C.C Building with Soft Storey” ISSN 0973-
4562 Vol.7 No.11 (2012).
14) Jonathan Buckalew, Bruce Maison, Brian McDonald(2015),
“Case Studies of Soft-Story Retrofits Using Different
Design Guidelines” December 2015.
15) Seval Pinarbasi, Dimitrios Konstantinidis, James M.
Kelly(2007), “Seismic Isolation For Soft-Story Buildings”
10th World Conference on Seismic Isolation, Energy
Dissipation and Active Vibrations Control of Structures,
Istanbul, Turkey, May 28-31, 2007.
16) Anirudhha Banhatti(2016) “Seismic Retrofitting of
Building with Soft Storey and Floating Column” Volume:
03 Issue: 07.
17) Gerardo Verderame, Flavia De Luca(2011), “Preliminary
analysis of a soft?storey mechanism after the 2009 L`Aquila
earthquake” Earthquake Engineering & Structural Dynamics
· July 2011, Impact Factor: 1.95 · DOI: 10.1002/eqe.1069.
18) IS:456(2000), “Indian Standard code of Practice for Plain
and Reinforced concrete”, bureau of Indian standard, New
Delhi.
19) IS:875(1987) “Indian standard code of practice for structural
safety of buildings: loading standard (other than
Earthquake)”,bureau of Indian standards, New Delhi.
20) IS:1893(2000,Part 1),“Indian standard criteria for
earthquake Resistance Design of Structure”, bureau of
Indian standards, New Delhi.
21) A.R. Dar (2015)”Study on Seismic Vulnerability
Assessment of a College Building in India” Volume 24
Number 4- June 2015.
Keywords
soft storey, floating columns, bracings,
shear walls, ETABS.