Earthquakes and Structures

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Analysis of settlements of space frame-shear wall-soil system under seismic forces

  • Jain, D.K. (Department of Civil Engineering, Maulana Azad National Institute of Technology) ;
  • Hora, M.S. (Department of Civil Engineering, Maulana Azad National Institute of Technology)
  • Received : 2014.05.18
  • Accepted : 2014.11.06
  • Published : 2015.05.25
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Abstract

The importance of considering soil-structure interaction effect in the analysis and design of RC frame buildings is increasingly recognized but still not penetrated to the grass root level owing to various complexities involved. It is well established fact that the soil-structure interaction effect considerably influence the design of multi-storey buildings subjected to lateral seismic loads. The shear walls are often provided in such buildings to increase the lateral stability to resist seismic lateral loads. In the present work, the linear soil-structure analysis of a G+5 storey RC shear wall building frame resting on isolated column footings and supported by deformable soil is presented. The finite element modelling and analysis is carried out using ANSYS software under normal loads as well as under seismic loads. Various load combinations are considered as per IS-1893 (Part-1):2002. The interaction analysis is carried out with and without shear wall to investigate the effect of inclusion of shear wall on the total and differential settlements in the footings due to deformations in the soil mass. The frame and soil mass both are considered to behave in linear elastic manner. It is observed that the soil-structure interaction effect causes significant total and differential settlements in the footings. Maximum total settlement in footings occurs under vertical loads and inner footings settle more than outer footings creating a saucer shaped settlement profile of the footings. Each combination of seismic loads causes maximum differential settlement in one or more footings. Presence of shear wall decreases pulling/pushing effect of seismic forces on footings resulting in more stability to the structures.

Keywords

References

  1. Agrawal, R. and Hora, M.S. (2010), "Effect of differential settlements on nonlinear interaction behaviour of plane frame-soil system", J. Eng. Appl. Sci., ARPN, 5(7), 75-87.
  2. ANSYS Inc. (2009), ANSYS Structural Analysis Guide, ANSYS Inc., Southpointe, 275 Technology Drive, Canonsburg, PA 15317.
  3. Arlekar, J.N., Jain, S. and Murthy, C.V.R. (1997), "Seismic response of R.C. frame buildings with soft first storeys", Proceedings of the CBRI Golden Jubilee Year Conference on Natural Hazards in Urban Habitat, New Delhi, India.
  4. Bishop, A.W. and Henkel, D.J. (1962), The Measurement of Soil Properties in the Tri-axial Test, Edward Arnold Ltd., London, UK.
  5. Code IS 456 (2000), Indian Standard, plain and reinforced concrete-code of practice (Fourth Revision), Bureau of Indian Standards, New Delhi, India.
  6. Code IS 875 (Part 2) (1987), Indian Standard code of practice for design loads (other than earthquake) for buildings and structures, part 2, imposed loads (Second Revision), Bureau of Indian Standards, New Delhi, India.
  7. Code IS 1893 (Part 1) (2002), Criteria for earthquake resistant design of structures (Part 1: General Provisions And Buildings) (Fifth Revision), Bureau of Indian Standards, New Delhi, India.
  8. Edgers, L., Sanayei, M. and Alonge, J.L. (2005), "Modeling the effects of soil-structure interaction on a tall building bearing on a mat foundation", Civ. Eng. Practice, ASCE, 51-68.
  9. Garg, V. and Hora, M.S. (2012), "Interaction effect of space frame-strap footing-soil system on forces in superstructure", ARPN J. Eng. Appl. Sci., 7(11), 1402-1415.
  10. Hayashi, Y. and Takahashi, I. (2004), "Soil-structure interaction effects on building response in recent earthquakes", Proceedings of the Third UJNR Workshop on Soil-Structure Interaction, Monto Park, California, USA.
  11. Hora, M. (2006), "Nonlinear interaction analysis of infilled building frame-soil system", J. Struct. Eng., 33(4), 309-318.
  12. Mandal, A., Moitra, D. and Dutta, S.C. (1998), "Soil-structure interaction on building frame: a small scale model study", Int. J. Struct., 18(2), 92-108.
  13. Natarajan, K. and Vidivelli, B. (2009), "Effect of column spacing on the behaviour of frame-raft and soil systems", J. Appl. Sci., 9(20), 3629-3640. https://doi.org/10.3923/jas.2009.3629.3640
  14. Noorzaei, J., Viladkar, M.N. and Godbole, P.N. (1995), "Elasto-plastic analysis for soil-structure interaction in framed structures", Comput. Struct., 55(5), 797-807. https://doi.org/10.1016/0045-7949(94)00432-3
  15. Pankaj, A. and Manish, S. (2006), Earthquake Resistant Design of Structures, PHI Learning Pvt. Ltd, Delhi, India.
  16. Renzi, S., Madiai, C. and Vannucchi, G. (2013), "A simplified empirical method for assessing seismic soilstructure interaction effects on ordinary shear-type buildings", Soil Dyn. Earthq. Eng., 55(2013), 100-107. https://doi.org/10.1016/j.soildyn.2013.09.012
  17. Shah, H.J. and Jain, S.K. (2008), Final Report :: A - Earthquake Codes, IITK-GSDMA Project on Building Codes: Design example of a six storey building, Document No. :: IITK-GSDMA-EQ26-V3.0, National Information Centre of Earthquake Engineering, IIT Kanpur, India.
  18. Shakib, H. and Atefatdoost, G.R. (2011), "Effect of soil-structure interaction on torsional response of asymmetrical wall type systems", Procedia Eng., Elsevier, 14, 1729-1736. https://doi.org/10.1016/j.proeng.2011.07.217
  19. SP-22 (1982), Explanatory Handbook on Codes for Earthquake Engineering (IS: 1893-1975 and IS: 4326-1976), Bureau of Indian Standards, New Delhi, India.
  20. Stavridis, L.T. (2002), "Simplified analysis of layered soil-structure interaction", J. Struct. Eng. Div., ASCE, 128(2), 224-230. https://doi.org/10.1061/(ASCE)0733-9445(2002)128:2(224)
  21. Thangaraj, D. and Ilamparuthi, K. (2010), "Parametric study on the performance of raft foundation with interaction of frame", Electron J. Geotech. Eng., 15, 861-878.
  22. Wang, C.M., Chow, Y.K. and How, Y.C. (2001), "Analysis of rectangular thick rafts on an elastic halfspace", Comput. Geotech, 28(3), 161-184. https://doi.org/10.1016/S0266-352X(00)00030-6
  23. Yahyai, M., Mirtaheri, M., Mahoutian, M. and Daryan, A. (2008), "Soil structure interaction between two adjacent buildings under earthquake load", Am. J. Eng. Appl. Sci., 1(2), 121-125. https://doi.org/10.3844/ajeassp.2008.121.125

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