Using bender elements to evaluate the shear wave velocity in dynamic centrifuge modeling test and its applocation.

• Main Authors: Chung-Ju Wang, 王崇儒
• Other Authors: Chung-Jung Lee
• Format: Others
• Language: zh-TW
• Published: 2010
• Online Access: http://ndltd.ncl.edu.tw/handle/10630303167185199692

碩士 === 國立中央大學 === 土木工程研究所 === 98 === 　　In this research, a bender elements system and the related software have been developed for evaluating the in-flight shear wave velocity in dynamic centrifuge tests. The in-flight shear wave velocity and the calculated maximum shear modulus profiles of the models were obtained. Before and after seismic events shear wave velocity profile can also be determined, and the profile is used to evaluate the change of dynamic soil property and the liquefaction potential of soil bed based soil resistance criteria in terms of shear wave velocity. 　　During earthquakes the shear modulus would change with time. The developed bender element system is capable of measuring the evolution of shear wave velocity on the model during shaking as well. The test result shows that the shear wave velocities decrease with the increase of excess pore water pressure during shaking, while the shear wave velocities gradually increase as the excess pore water pressure dissipates after stop of shaking.