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Waste versus Earthquake

Dynamic properties of reinforced soil materials and biological stabilized waste focussing on their suitability as an isolating ground material

Massachusetts Institute of Technology, 1998-1999
supported by Deutsche Forschungsgemeinschaft

erdiran_th

OBJECTIVES

     

  • Determination of dynamical properties of biological pretreated and stabilized waste as well as Reinforced Earth materials
  • Investigation of basic mechanisms, the dynamical behavior is due to
  • Identification of material parameter affecting the dynamical properties
  • Evaluation of appropriate materials and mixtures to act as an ground isolator against earhquake loading

METHOD

     

  • Samples of MSW and Reinforced Earth materials are investigated in cyclic simple shear test
  • Damping and degradation values are determined
wastedss

Samples of various waste materials

shear

Waste specimen after cyclic shear tests showing irreversible deformations

RESULTS

     

  • Extraordinary damping characteristic of pretreated MSW
  • Due to its extremly high shear strength, MSW is able to bear shear deformation up to 25 % without failure
  • Shear strength of MSW and reinforced materials is not recorded completely in simple shear test procedures. Large scale testing might generate even better results
  • damping hits maximal values of 60%!
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results of DSS-tests - MSW sample called Stendal vs. reinforced sand

damping

results of DSS-tests - damping of various waste samples vs. sand

Towhata, Kawano, Yonai, Kölsch (2004): Laboratory tests on dynamic properties of municipal waste. 11th International Conference Soil Dynamics and Earthquake Engineering, Berkeley. Download

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