Effect of nonlinear soil-structure interaction on seismic response of low-rise SMRF buildings
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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.
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- Effect of nonlinear soil-structure interaction on seismic response of low-rise SMRF buildings
Earthquake Engineering and Engineering Vibration
Volume 11, Issue 4 , pp 541-551
- Cover Date
- Print ISSN
- Online ISSN
- Institute of Engineering Mechanics, China Earthquake Administration
- Additional Links
- soil-structure interaction
- Winkler modeling
- nonlinear analysis
- seismic response
- low-rise steel moment resisting frame