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Comparative study of strengthening strategies for reinforced concrete frame with soft ground story

Md. Shafiqul Islam, Aojoy Kumar Shuvo



One of the common forms of reinforced concrete (RC) framed building is to provide parking facility at ground level which is created by not providing any infill masonry at parking floor level. Due to the presence of infill walls in the entire upper story except for the ground story makes the upper stories much stiffer than the open ground story resulting in their poor performance during earthquakes. So strengthening of such reinforced concrete (RC) frame buildings with an open ground story is indispensable. In the present study several Strengthening options were evaluated for their effectiveness in improving the performance of such building without disturbing the parking facility of ground story based on linear and nonlinear analysis. The strengthening techniques studied were changing column dimension, providing diagonal bracing, lateral buttresses, shear wall, and providing chevron. The Strengthened building results were compared with the results of the original structure to deduce the structural performance improvement and cost associated to each solution were determined to develop cost efficiency relation for different strengthening technique. Providing lateral buttresses in the open first story was found to be more feasible in both case of increase ground story strength and economic point of view among all strengthening options.


reinforced concrete frame; infill masonry; strengthening options; seismic effects; cost–efficiency

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Abdelkareem KH, Abdel Sayed FK, Ahmed MH, AL-Mekhlafy N (2013). Equivalent Strut Width for Modeling R.C. Infilled Frames. Civil Engineering Department, Faculty of Engineering, Assiut University.

Amin MR, Hasan P, Islam BKMA (2011). Effect of soft storey on multi storied reinforced concrete building frame. 4th Annual Paper Meet and 1st Civil Engineering Congress, Dhaka, Bangladesh.

ATC (1996). Seismic Evaluation and Retrofit of Concrete Buildings. Applied Technology Council, Volume 1 (ATC-40), Report No. SSC 96-01. Redwood City (CA).

BIS (2002). Indian standard criteria for earthquake resistant design of structures. Bureau of Indian Standards, Part 1: General provisions and buildings. IS 1893, Fifth Revision, New Delhi, India.

BNBC (1993). Bangladesh National Building Code. Housing and Building Research Institute and Bangladesh Standards and Testing Institutions, Bang-ladesh.

Bulgarian Seismic Code (1987). Code for design of buildings and structures in seismic regions. Bulgarian Academy of Science Committee of Territorial and Town System at the Council of Ministers, Sofia, Bulgaria.

ETABS Nonlinear Version 9.7.0. Extended 3-D analysis of the Building Systems. California: Computers and Structures Inc. Berkeley.

FEMA 356 (2000). NEHRP Pre standard and commentary for the seismic rehabilitation of buildings. Federal Emergency Management Agency, Wash-ington, D.C.

Furtado A, Rodrigues H, Varum H, Costa A (2014). Assessment and strengthening strategies of existing RC buildings with potential soft-storey re-sponse. 9th International Masonry Conference, Guimaraes.

Furtado A, Rodrigues H, Varum H, Costa A (2015). Evaluation of different strengthening techniques’ efficiency for a soft storey building. European Journal of Environmental and Civil Engineering, 21(4), 371-388.

Hendry AW (1998). Structural Masonry, 2nd ed. Macmillan Press, London.

Holmes M (1961). Steel frames with brick and concrete infilling. Proceedings of Institution of Civil Engineers, 19. 473-478.

Hoque KMAE (2006). A rationale for determining the natural period of RC building frames having infill. Engineering Structures, 28, 495–502.

Kasliwal NA, Rajguru RS (2016). Effect of numbers and positions of shear walls on seismic behaviour of multistoried structure. International Journal of Science, Engineering and Technology Research, 5(6), 2229-2232.

Kaushik HB, Rai DC, Jain SK (2009). Effectiveness of some strengthening options for masonry-infilled RC frames with open first story. Journal of Structural Engineering, 135(8), 925-937.

Liauw TC, Kwan KH (1984). Nonlinear behavior of non-integral infilled frames. Computers & Structures, 18, 551-560.

Narkhede DV, Deshkukh GP (2016). Performance of shear wall building at various positions by using pushover analysis. International Journal of Research in Advent Technology, Special Issue, 83-89.

NZS-3101(1995). Code of Practice for the Design of Concrete Structures. Part 1, Standards Association of New Zealand, Wellington, New Zealand.

Patel S (2012). Earthquake Resistant Design of Low-Rise Open Ground Storey Framed Building. M.Sc. Thesis, National Institute of Technology, Rourke-la, India.

Pauley T, Priestley MJN (1992). Seismic design of reinforced and masonry buildings. Wiley Interscience Inc., USA.

Raju KL, Balaji KVGD (2015). Effective location of shear wall on performance of building frame subjected to earthquake load. International Advanced Research Journal in Science, Engineering and Technology, 2(1), 33-36.

Sahoo DR, Rai DC (2013). Design and evaluation of seismic strengthening techniques for reinforced concrete frames with soft ground story. Engineer-ing Structures, 56, 1933-1944.

SII (1995). Design provisions for earthquake resistance of structures. Standards Institution of Israel, SI 413, Tel-Aviv, Israel.

Smith SB, Carter C (1969). A method of analysis for infilled frames. Proceedings of Institution of Civil Engineers Part 2, 44, 31-48.


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