The main features of DEEPSOIL are: '''1D equivalent linear analysis:''' • Unlimited number of layers / material properties / number of acceleration data points of input ground motion • 3 types of complex shear modulus '''1D nonlinear analysis:''' • Confining pressure dependent soil model • 4 types of viscous damping formulations • Increased numerical accuracy and efficiency • Pore water pressure generation (Matasovic and Vucetic, 1993, 1995; Green et al., 2000)/dissipation capability. '''Graphical user-interface:''' • Visual selection of optimum modes/frequencies of the viscous damping formulation • Visual selection of nonlinear soil parameters: Once the nonlinear soil parameters are selected, G/Gmax and damping ratio curves can be calculated / displayed and compared to selected reference curves. • Allows both English and metric units • Animation of horizontal displacement of the soil column (only for time domain analysis) • Convergence check (only for equivalent linear analysis): DEEPSOIL displays the maximum strain profile for each iteration in performing equivalent linear analysis. This feature allows easy checking of whether the solution has converged. • PGA profile • DEEPSOIL displays acceleration, strain, stress time histories, Fourier response spectrum, Fourier amplification ratio spectrum, and response spectrum at selected layers. It is also possible to export output into text files • DEEPSOIL can convert NEHRP Site class A motion to Site class B/C motion and vice versa. • DEEPSOIL can baseline correct any motion in the library • Output data is automatically exported for the user’s future reference See user manual in “Supporting Documentation” for more detail.
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DEEPSOIL was developed under the direction of Prof. Youssef M.A. Hashash in collaboration with several graduate and undergraduate students including Duhee Park, Chi-Chin Tsai, Camilo Phillips, David Groholski and Daniel Turner at the University of Illinois at Urbana-Champaign.
Development of DEEPSOIL was supported in part through Earthquake Engineering Research Centers Program of the National Science Foundation under Award Number EEC-9701785; the Mid America Earthquake Center. Additional support was received from University of Illinois at Urbana-Champaign. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation. The authors gratefully acknowledge this support.
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