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Geomechanics and Engineering Volume 9, Number 1, July 2015, pages 39-55 DOI: http://dx.doi.org/10.12989/gae.2015.9.1.039 |
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Seismic behavior of RC framed shear wall buildings as per IS 1893 and IBC provisions |
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B.R. Jayalekshmi and H.K. Chinmayi
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| Abstract | ||
| Usually the analyses of structures are carried out by assuming the base of structures to be fixed. However, the soil beneath foundation alters the earthquake loading and varies the response of structure. Hence, it is not realistic to analyze structures by considering it to be fixed. The importance of soil-structure interaction was realized from the past failures of massive structures by neglecting the effect of soil in seismic analysis. The analysis of massive structures requires soil flexibility to be considered to avoid failure and ensure safety. Present study, considers the seismic behavior of multi-storey reinforced concrete narrow and wide buildings of various heights with and without shear wall supported on raft foundation incorporating the effect of soil flexibility. Analysis of the three dimensional models of six different shear wall positions founded on four different soils has been carried out using finite element software LS DYNA. The study investigates the differences in spectral acceleration coefficient (Sa/g), base shear and storey shear obtained following the seismic provisions of Indian standard code IS: 1893 (2002) (IS) and International building code IBC: 2012 (IBC). The base shear values obtained as per IBC provisions are higher than IS values. | ||
| Key Words | ||
| base shear; design response spectrum; natural period; spectral acceleration coefficient; storey shear; shear wall; soil-structure interaction | ||
| Address | ||
| Department of Civil Engineering, National Institute of Technology Karnataka, Surathkal 575-025, India. | ||