Browsing ERL Industry Consortia Technical Reports by Author "Johnson, Paul"

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    • In Situ, Nonlinear Soil Response Applying an Active Source 

      Johnson, Paul; Toksoz, M. Nafi; Morgan, Frank Dale; Pearce, Fred (Massachusetts Institute of Technology. Earth Resources Laboratory, 2009)
      Soil sites have a profound effect on ground motion during earthquakes due to their low wave speeds, layered structure, and nonlinear constitutive relationship. Measurements of nonlinear soil response under natural ...

    • Nonlinear Soil Response in the Near-Field of a Vibrator Truck: Application to Land Seismic Surveys 

      Pearce, Fred; Willis, Mark E.; Burns, Daniel R.; Toksoz, M. Nafi; Johnson, Paul (Massachusetts Institute of Technology. Earth Resources Laboratory, 2007)
      The nonlinear behavior of soils can significantly modify the wavelet radiated from vibrator trucks. In this paper, we describe a field experiment designed to measure the nonlinear response of a natural soil formation in ...