한국지반공학회:학술대회논문집 (Proceedings of the Korean Geotechical Society Conference)
- 한국지반공학회 2006년도 춘계 학술발표회 논문집
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- Pages.590-599
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- 2006
에너지 개념에 기초한 액상화 평가방법에 관한 연구
Evaluation of Liquefiable Soils by Energy Concept
- Kim, Soo-Il (Dept. of Civil Engineering, Yonsei University) ;
- Sun, Yu-Jung (Dept. of Civil Engineering, Yonsei University) ;
- Park, Keun-Bo (Dept. of Civil Engineering, Yonsei University) ;
- Park, Seong-Yong (Dept. of Civil Engineering, Yonsei University)
- 발행 : 2006.03.24
초록
In this study, Liquefaction characteristics of saturated sand under various dynamic loadings such as sinusoidal loading, increasing wedge loading, and real earthquake loading were investigated focusing on the dissipated energy. From the results of cyclic triaxial test, liquefaction resistance strength was calculated by the concept of energy according to the type of input loading. Liquefaction resistance strength was expressed in accumulated dissipated energy calculated from stress-strain curve(hysteresis loop). The dissipated energy according to loading type was compared and the energy-based evaluation was proposed. The procedures are presented in terms of normalized energy demand(NED), normalized energy capacity(NEC), and factor of safely, where NED is the load imparted to the soil by the loading(both amplitude and duration), NEC is the demand required to induce liquefaction, and factor of safely is defined as the ratio of NEC and NED.
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