Estimation of the Dynamic Properties of Sands by Bender Element Tests
碩士 === 國立臺灣科技大學 === 營建工程系 === 93 === This research performed bender element tests with different frequencies of waves on Yaun-Lin sand and Hsin-Dian sand to study the effects of frequencies on the arriving time of shear wave; and the suitable range of frequencies was determined first. Then, bender e...
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| Format: | Others |
| Language: | zh-TW |
| Published: |
2005
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| Online Access: | http://ndltd.ncl.edu.tw/handle/64988652901855787926 |
| Summary: | 碩士 === 國立臺灣科技大學 === 營建工程系 === 93 === This research performed bender element tests with different frequencies of waves on Yaun-Lin sand and Hsin-Dian sand to study the effects of frequencies on the arriving time of shear wave; and the suitable range of frequencies was determined first. Then, bender element tests with suitable frequencies were carried out together with cyclic triaxial tests on Yaun-Lin sand to establish the relationship between shear wave velocity and liquefaction resistance.
Test results showed that the arriving time of shear wave would be obviously underestimated and the signal received is very weak and hard to distinguish when the input frequency is below 5 kHz. When the input frequency is above 20 kHz, there would be larger errors in determination of the arriving time by different methods of analyses. There exists a quite good relationship between shear wave velocity and liquefaction resistance. Compared with the curves suggested by Andrus and Stokoe (1996), the liquefaction resistances estimated by bender element tests of this research are slightly higher than their results at the same shear wave velocities.
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