| Title |
Verification of Combined Sinusoidal Loads for Simulating Real Earthquakes |
| DOI |
https://doi.org/10.12652/Ksce.2019.39.6.0811 |
| Keywords |
정현하중;실지진하중;조합형 정현하중;진동대시험;유효응력해석 Sinusoidal load;Real earthquake;Combined sinusoidal load;Shaking table test;Effective stress analysis |
| Abstract |
Since the Gyeongju earthquake in 2016 and the Pohang earthquake in 2017, the performance of various dynamic tests for seismic design has increased in Korea. However, sinusoidal load has been continuously used in the conventional laboratory tests to evaluate liquefaction potential and determine input-parameters in the numerical analysis. However, recent research results suggest that it is difficult to accurately simulate excess pore water changes of the ground under earthquake loads. In order to solve this problem, this study proposes a combined sinusoidal loading and examines its applicability to the cyclic shear and triaxial test. Also, its validity is examined through performing of shaking-table test and numerical analysis based on the effective stress model. As a result, it was found that the proposed combined sinusoidal loading can more accurately simulate the change of excess pore water pressure in saturated soils under real earthquake load than the sinusoidal load. |