抄録
The effects of system compliance on pore pressure response during undrained cyclic triaxial tests are examined based on a review of previous studies. The presence of system compliance decreases the amplitude of pore pressure fluctuation caused by cyclic changes in the axial load, making the stress path slanted. On the basis of theoretical studies, equations are presented for determining the system compliance ratio of a specimen using its pore pressure coefficients A and B. A-value can readily be determined from pore pressure fluctuation during an undrained cyclic triaxial test. The system compliance ratios given by the proposed equations are in good agreement with those measured by a special test. A simplified procedure is then presented for correcting for the system compliance effects on triaxial liquefaction test results. The proposed method requires neither special test conditions nor additional tests, and can therefore conveniently be used in many cases.
