Foundation Soil Response to Wind Turbine Generator Loading

A wind turbine generator (WTG) structure is typically supported by a large octagonal mass of reinforced concrete that, in turn, rests on the foundation soil. The foundation soil must provide for adequate bearing capacity, rotational stiffness, and limit differential settlement. However, the pressure acting on the foundation soil varies temporally and spatially as a function of wind speed and direction and the soil properties. Field verification of dynamic responses and pressure distribution assumptions are highly relevant to establishing mechanistically correct WTG foundation behavior. Two WTG foundations in the Midwest have been instrumented, with emphasis on evaluating the dynamic forces and the soil response to in-service wind actions. According to field measurements, WTG foundation soil deformation and pressure distribution ranged from 0.0005 mm to 0.02 mm and 20 kPa to 110 kPa, respectively. The soil deformation profile and pressure distribution were not uniform and depend on depth below the foundation, offset from the centerline, and eccentricity of the dynamic load.

Language

  • English

Media Info

  • Media Type: Web
  • Features: References;
  • Pagination: pp 1493-1502
  • Monograph Title: Geo-Congress 2014 Technical Papers: Geo-Characterization and Modeling for Sustainability

Subject/Index Terms

Filing Info

  • Accession Number: 01522540
  • Record Type: Publication
  • ISBN: 9780784413272
  • Files: TRIS, ASCE
  • Created Date: Mar 25 2014 3:05PM