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Effects of foundation uplift on the dynamic response of steel frames

Salehi, M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.1061/9780784480410.038
  3. Abstract:
  4. This paper examines the effects of foundation uplift on the dynamic response of steel frames supported by shallow foundations. In order to achieve this goal, the dynamic responses of a number of two-dimensional concentrically braced steel frames with fixed base, flexible base preventing uplift, and flexible base allowing uplift, are compared. The steel frames are modeled by considering material nonlinearities and P-Delta effects, while the soil-foundation system is modeled through the Winkler foundation approach. The dynamic analyses are conducted using 15 far-fault ground-motions with various intensities and different response parameters are monitored. According to the achieved responses, the presence of foundation uplift generally increases the total displacement demands and reduces the inter-story drift ratio and ductility demands. The important parameters affecting the responses of uplift-permitted frames are also introduced and examined. © ASCE
  5. Keywords:
  6. Foundations ; Steel construction ; Structural frames ; Braced steel frames ; Displacement demand ; Ductility demands ; Inter-story drift ratios ; Material non-linearity ; Response parameters ; Shallow foundations ; Winkler foundations ; Dynamic response
  7. Source: Structures Congress 2017: Buildings and Special Structures - Selected Papers from the Structures Congress 2017, 6 April 2017 through 8 April 2017 ; 2017 , Pages 459-472 ; 9780784480410 (ISBN)
  8. URL: https://ascelibrary.org/doi/abs/10.1061/9780784480410.038