Current Science

Open Access Open Access  Restricted Access Subscription Access

Seismic Analysis of Vertically Irregular Buildings


Affiliations
1 Department of Civil Engineering, Mavin Switchgears and Control Pvt Ltd, Aurangabad 431 001, India
2 Department of Civil Engineering, SND College of Engineering and Research Centre, Yeola 423 401, India
 

The greatest challenge for any structural engineer in today's scenario is to design seismic-resistant structures. A regular building, i.e. having mass and stiffness uniformly distributed through its height behaves normally. The presence of vertical irregular frame subject to devastating earthquakes is a matter of concern. Points of sudden change in stiffness, mass and strength in buildings are known as weak points. For the design of safe irregular buildings it is necessary to study the effect of irregularity on the response of buildings to lateral loads. Here we study the proportional distribution of lateral forces evolved through seismic action in each storey level due to changes in mass and stiffness of frame on vertically irregular structures. The effect of mass and stiffness irregularity of G + 10-storeyed vertical geometric irregular building is studied using finite element method-based software. Two methods of analysis, namely linear static and linear dynamic analysis are used to evaluate response of the structure in the form of storey shear, storey displacement and storey drift. Responses are plotted and compared, and conclusions have been made from the results.

Keywords

Finite Element Method, Irregular Buildings, Seismic Analysis, Lateral Load.
User
Notifications
Font Size

  • Jack, P. and Moehle, A. M., Seismic response of vertically irregular structures. ASCE J. Struct. Eng., 1984, 110(9); ISSN 0733-9445/84/0009-2002, Paper No. 19161.

  • Bhattacharya, S. P. and Chakraborty, S. K., Estimation of storey shear of a building with mass and stiffness variation due to seismic excitation. Int. J. Civil Struct. Eng., 2010, 1(3); ISSN 0976–4399.

  • Valmundsson, E. V. and Nau, J. M., Seismic response of buildings frames with vertical structural irregularities. ASCE J. Struct. Eng., 1997, 123(1), 30–41.

  • Sadashiva, V. K., MacRae, G. A. and Deam, B. L., Determination of structural irregularity limits – mass irregularity example. Bull. NZ Soc. Earthquake Eng., 2009, 42(4).

  • Chintanapakdee, C. and Chopra, A. K., Seismic response of vertically irregular frames: response history and modal pushover analyses. ASCE J. Struct. Eng., 2004, 130(8), 1177–1185.

  • Ravikumar, C. M., Babu Narayan, K. S., Sujith, B. V., Venkat Reddy, D., Effect of irregular configurations on seismic vulnerability of RC buildings. Architecture Res., 2012, 2(3), 20–26.

  • IS: 456-2000 (Fourth Revision), Indian standard code for practice for plain reinforced concrete for general building construction, Bureau of Indian Standards, New Delhi, 2000.

  • IS 1893 (Part-I):2002, Criteria for earthquake design structures, general provisions on buildings, Bureau of Indian Standards, New Delhi, 2002.

  • Murty, C. V. R., Earthquake tips. Indian Institute of Technology Kanpur, September 2005.

  • Arun Solomon, A. and Hemalatha, G., Limitation of irregular structure for seismic response. Int. J. Civil Struct. Eng., 2013, 3(3), 579–590.

  • Dubey, S. K. and Sangamnerkar, P. D., Seismic behavior of asymmetric RC buildings. Int. J. Adv. Eng. Technol., E-ISSN 0976-3945.


Abstract Views: 340

PDF Views: 130




  • Seismic Analysis of Vertically Irregular Buildings

Abstract Views: 340  |  PDF Views: 130

Authors

Shaikh Abdul Aijaj Abdul Rahman
Department of Civil Engineering, Mavin Switchgears and Control Pvt Ltd, Aurangabad 431 001, India
Ansari Ubaidurrahman Salik
Department of Civil Engineering, SND College of Engineering and Research Centre, Yeola 423 401, India

Abstract


The greatest challenge for any structural engineer in today's scenario is to design seismic-resistant structures. A regular building, i.e. having mass and stiffness uniformly distributed through its height behaves normally. The presence of vertical irregular frame subject to devastating earthquakes is a matter of concern. Points of sudden change in stiffness, mass and strength in buildings are known as weak points. For the design of safe irregular buildings it is necessary to study the effect of irregularity on the response of buildings to lateral loads. Here we study the proportional distribution of lateral forces evolved through seismic action in each storey level due to changes in mass and stiffness of frame on vertically irregular structures. The effect of mass and stiffness irregularity of G + 10-storeyed vertical geometric irregular building is studied using finite element method-based software. Two methods of analysis, namely linear static and linear dynamic analysis are used to evaluate response of the structure in the form of storey shear, storey displacement and storey drift. Responses are plotted and compared, and conclusions have been made from the results.

Keywords


Finite Element Method, Irregular Buildings, Seismic Analysis, Lateral Load.

References





DOI: https://doi.org/10.18520/cs%2Fv111%2Fi10%2F1658-1663