抄録
Simultaneous monotonic and cyclic loading may be applied to a soil element near, for example, retaining structures during earthquakes. To study into the behavior of saturated sand in such a case as above, a series of undrained triaxial tests were performed by applying cyclic stresses to a specimen which is subjected to continuous monotonic loading at a constant axial strain rate simultaneously. It was found that the behavior of sand in these tests was different from those in other types of cyclic loading tests in which cyclic stresses are fully or partially reversed or not reversed between the triaxial compression and extension conditions.
Furthermore, a sort of interaction effect of cyclic and monotonic loading on the liquefaction was observed, of which the tendency depended on the density of specimen.
