Earthquake Engineering and Engineering Vibration

, Volume 11, Issue 4, pp 541–551

Effect of nonlinear soil-structure interaction on seismic response of low-rise SMRF buildings

Article

DOI: 10.1007/s11803-012-0140-2

Cite this article as:
Raychowdhury, P. & Singh, P. Earthq. Eng. Eng. Vib. (2012) 11: 541. doi:10.1007/s11803-012-0140-2

Abstract

The nonlinear behavior of a soil-foundation system may alter the seismic response of a structure by providing additional fl exibility to the system and dissipating hysteretic energy at the soil-foundation interface. However, the current design practice is still reluctant to consider the nonlinearity of the soil-foundation system, primarily due to lack of reliable modeling techniques. This study is motivated towards evaluating the effect of nonlinear soil-structure interaction (SSI) on the seismic responses of low-rise steel moment resisting frame (SMRF) structures. In order to achieve this, a Winklerbased approach is adopted, where the soil beneath the foundation is assumed to be a system of closely-spaced, independent, nonlinear spring elements. Static pushover analysis and nonlinear dynamic analyses are performed on a 3-story SMRF building and the performance of the structure is evaluated through a variety of force and displacement demand parameters. It is observed that incorporation of nonlinear SSI leads to an increase in story displacement demand and a significant reduction in base moment, base shear and inter-story drift demands, indicating the importance of its consideration towards achieving an economic, yet safe seismic design.

Keywords

soil-structure interactionWinkler modelingnonlinear analysisseismic responselow-rise steel moment resisting frame

Copyright information

© Institute of Engineering Mechanics, China Earthquake Administration and Springer-Verlag Berlin Heidelberg 2012

Authors and Affiliations

  1. 1.Indian Institute of TechnologyKanpurIndia
  2. 2.Prishati RaychowdhuryIndian Institute of TechnologyKanpurIndia