| 논문명 |
진동형태를 달리한 포화사질토의 동적실내시험결과 비교분석 / Comparison on Dynamic Laboratory Test Results of Saturated Sands Varying the Vibration Loading Type / 제 Ⅰ-2 분과 : 지반진동 및 응답특성 |
| 수록사항 |
한국지진공학회 춘계학술발표회 논문집 (2007-03) |
| 요약2 |
Though it has been found that the real earthquake load is irregular and unpredictable, a cyclic loading has been used to simulate the real earthquake motion in the experimental research on the part of soil dynamics. In the soil liquefaction research, based on the equivalent stress concept, the irregular earthquake has been also simplified as a sinusoidal wave. However, with 90s' rapid development in the signal processing technology, the experimental research using the real earthquake has increased at recent. In this study, 4 types of dynamic motions such as the sinusoidal wave, the triangular wave, the incremental triangular wave and several real earthquake motions which were classified with shock-type and vibration-type were loaded in the dynamic laboratory test to compare the liquefaction phenomenon according to the loading shape. Especially, the rapid development of excess pore water pressure to initiate the liquefaction were investigated in detail. Based on the comparison and detailed investigation, it is found that the cyclic sinusoidal or triangular load cannot reflect the real earthquake motion. Also, it is found that the effect of external dynamic force is not prior than the internal excess pore water pressure when the deformation generates largely and the excess pore water pressure increase rapidly. |
