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응력유도 및 고유 이방성에 따른 전단파 속도 특성
Characteristics of Shear Wave Velocity as Stress-induced and Inherent Anisotropies
이창호 ( Chang Ho Lee ) , 이종섭 ( Jong Sub Lee ) , 조태현 ( Tae Hyeon Cho ) , 이정학 ( Jeong Hark Lee ) , 김상호 ( Sang Ho Kim )
UCI I410-ECN-0102-2015-500-001856520
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Shear wave velocity of uncemented soil can be expressed as the function of effective stresses when capillary phenomena are negligible. However, the terms of effective stresses are divided into the direction of wave propagation and polarization because stress states are generally anisotropy. The shear wave velocities are affected by α parameters and β exponents that are experimentally determined. The β exponents are controlled by contact effects of particulate materials (sizes, shapes, and structures of particles) and the α parameters are changed by contact behaviors among particles, material properties of particles, and type of packing (i.e., void ratio and coordination number). In this study, consolidation tests are performed by using clay, mica and sand specimens. Shear wave velocities are measured during consolidation tests to investigate the stress-induced and inherent anisotropies by using bender elements. Results show the shear wave velocity depends on the stress-induced anisotropy for round particles. Furthermore, the shear wave velocity is dependent on particle alignment under the constant evvective stress. This study suggests that the shear wave velocity and the shear modulus should be carefully estimated and used for the design and construction of geotechnical structures.

[자료제공 : 네이버학술정보]
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