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Study of Dynamic Characteristics of West Coast Saemangeum Sand by Torsional Shear Test

비틂전단시험에 의한 서해안 새만금 모래의 동적특성 연구

Jeon, Hong-Woo;Son, Su-Won;Kim, Jin Man
전홍우;손수원;김진만

  • Received : 2013.09.03
  • Accepted : 2013.12.18
  • Published : 2013.12.31

Abstract

The dynamic characteristics of west coast sand were investigated in order to evaluate the design properties of the offshore wind turbine foundations to be constructed in the West Sea. Torsional shear tests were performed at different confining pressures and densities on specimens constituted by the dry fluviation method. The strain-dependent shear modulus and damping curves were obtained, together with modulus degradation curves. The results show that the confining pressure is more influential on the dynamic characteristics of the sand than the density. It was also found that the dynamic curves from this study were similar to those proposed by others. The modulus degradation ratio $G/G_{1st}$ varies slightly at a small strain level, but increases significantly once beyond the intermediate strain level.

Keywords

Torsional shear test;Cyclic loading;Dynamic deformation characteristics;West coast sand

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Acknowledgement

Supported by : 국토해양부