지반의 동적 모형 시험을 위한 강성토조, 연성토조의 경계조건 영향 분석

Abstract

The seismic simulation test using 1g shaking table is an effective test to understand the factor of soil acceleration and amplification. In this shaking table test, the soil box is an indispensable device for modeling the ground slope and the structure. Among them, Laminar Shear Box(LSB) is advantageous to simulate free field than Rigid Box(RB) because its behavior is similar to displacement and acceleration for vibration wave. On the other hand, RB has a limitation in simulating free field due to boundary effect induced by rigid wall. In this study, the RB and the LSB were constructed to be able to move in the horizontal direction and were tested with 1g shaking table. The boundary effects of the RB and LSB were compared and were the sponge was attached to the RB at a thickness of 5cm, 10cm, and 15cm, respectively, to observe how the sponge reduces the boundary effect. From the center of the different points were observed amplification of the acceleration. Finally, the center acceleration of LSB, which is supposed to simulate the behavior of semi-infinite half space, is verified by one-dimensional ground response analysis.