Nonlinear Seismic Response and Damage of Reinforced Concrete Ducts in Liquefiable Soils

  • Okhovat Mohammad Reza
    Department of Civil Engineering, University of Tokyo, Tokyo, Japan.
  • Shang Feng
    State Key Laboratory of Hydro Science and Engineering, Tsinghua University, Beijing, P. R. China.
  • Maekawa Koichi
    Department of Civil Engineering, University of Tokyo, Tokyo, Japan.

Abstract

Highly inelastic nonlinear interaction of liquefied soil and underground RC ducts is computationally investigated in view of the structural damage. The required ductility is expected to be insensitive to the risk of liquefaction for normally deposited layers of soil, and the lesser ductility is acceptable for the case of highly liquefiable foundation similar to the seismic isolation. Although the structural nonlinearity has a fewer effect on the uplift of the underground ducts, the amount of main reinforcement may control the structural damage with the same efficiency for both drained and undrained soil deposits.

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