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The project used three kinds of soil which are sampled from
different areas of Taiwan , Fu Long, Li Gun and Chu Ain. The
spe- -ciment of each kind of sands was made by air-pluvition
method in three different relative densities,30%,50% and 75%.
Effective confining pressure was kept as 1kg/cm2. All the sand
was tested with regular loading by torsional shear apparantus
and cyclic triaxial apparatus respectively in order to compare
dyna- -mic shear strength, pore pressure buil-up, and
deformation under different type of loading. Besides, the
result of two diff- -erent kinds of sands in Taiwan, Da Ain and
Da Wen, were adopted to analyze together. The test results show
that:(1) Different type of loading applid on speciment results
in different dynamic shear strength and behavior. The dynamic
strngth obtained from cyclic triaxial test and torsional shear
test varies as soil type is different, however cyclic triaxial
test gets the large liquefaction resistance than torsional
shear test does. (2) By the physical character and dynamic
streng behavior, the analyzed Taiwan''s sand can be divided into
three categories, and via the relation between volume decrease
potention Vd and cyclic stress ratio, we can see the different
dynamic character between sands and Japanese Toyoura sand.
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