Damage to structures
during earthquakes may be fully or partly caused by soil liquefaction, which
has been the subject of extensive research for several decades. Liquefaction
susceptibility of a sandy deposit is performed by comparing the resistance of a
soil to liquefaction (i.e., capacity) to the load imparted by an earthquake
(i.e., demand). In this regard, the stress-based method of liquefaction
assessment is by far the most popular. It involves uncertainties mostly related
to the computation of the maximum horizontal ground acceleration (amax) at
bedrock. A site response analysis or a simplifi ed assumption is necessary to
determine the amax on the ground level as well. Developing from the
stress-based approach, the strain-based approach has also similar constraints.
There exist laboratory techniques such as torsional shear to determine the
capacity of a sandy soil in terms of liquefaction energy per unit volume.
Likewise, the energy of a strong motion record can be set by employing simple
physics principles. For this, a velocity time history and the unit mass of the
soil are employed to compute the demand of any strong motion record. The scope
of this investigation is to illustrate the usability of the energy-based method
for the evaluation of soil liquefaction. The defi ciencies of the stress- and
strain-based approaches are outlined and the advantages of the energybased
approach are discussed.
Primary Language | English |
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Subjects | Engineering |
Journal Section | Articles |
Authors | |
Publication Date | June 27, 2018 |
Published in Issue | Year 2018 Volume: 156 Issue: 156 |
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