Impact of soil stiffness on design of R.C. Frame-wall system: a comparative study of ethiopian and Indian seismic codes

Authors

  • Berhanu. Melkamu , Shilpa. Pal

Abstract

The dynamic soil-structure interaction effects for R.C. framed buildings with or without shear
wall on raft foundation is evaluated by explicit consideration soil-structure interaction as per Indian and
Ethiopian seismic codes. In the current study, the finite element model (Elastic continuum approach)
employed for soil-foundation-structure model. Hence, four and eight number of stories with or without shear
wall on raft foundation found on rock, dense, stiff and soft soil are designed and modeled in SAP 2000 v 21.
The buildings studied with or without incorporation of SSI effect. The analysis is carried out using response
spectrum analysis and SSI analysis. This paper demonstrates as the soil flexibility increases, the design
moments and flexural reinforcement increases. The ESEN-2 moments exceed that of the IS 456:2000 by an
average of about 15.6% at span and 15.53% at supports and the ESEN-2 exceeds IS 456: 2000 by an average
of about 15.58% for beam area of tension reinforcement for span and 15.4% for support. So, Indian code
provides a more economical design than Ethiopian code ESEN-2.

Published

2020-01-31

Issue

Section

Articles