| Correlation of liquefaction resistance with shear wave velocity based on laboratory study using bender element |
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| 作者姓名： | 周燕国 陈云敏 柯瀚 |
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| 作者单位： | Department of Civil Engineering，Zhejiang University，Department of Civil Engineering，Zhejiang University，Department of Civil Engineering，Zhejiang University Hangzhou 310027，China，Hangzhou 310027，China，Hangzhou 310027，China |
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| 基金项目： | 国家自然科学基金，浙江省教育厅资助项目 |
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| 摘 要： | INTRODUCTION Evaluation of soil liquefaction resistance is an important aspect of geotechnical engineering practice, and several types of evaluating procedures have evolved over the last three decades. The well known “simplified procedure” originated by Seed and Idriss (1971) can be used to evaluate liquefaction resistance based on standard penetration test (SPT) blow counts. Over the years, the simplified procedure has been modified and updated with additional data, and has become th…
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| 关 键 词： | 液化阻抗 煎切波速率 弯曲要素 沙土 地震场 |
| 收稿时间： | 2004-07-22 |
| 修稿时间： | 2005-02-03 |
Correlation of liquefaction resistance with shear wave velocity based on laboratory study using bender element |
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| Zhou?Yan-guo,Chen?Yun-min,Ke?Han.Correlation of liquefaction resistance with shear wave velocity based on laboratory study using bender element[J].Journal of Zhejiang University Science,2005,6(8):805-812. |
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| Authors: | Zhou Yan-guo Chen Yun-min Ke Han |
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| Institution: | 1.Department of Civil Engineering,Zhejiang University,Hangzhou,China |
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| Abstract: | Recent studies using field case history data yielded new criteria for evaluating liquefaction potential in saturated granular deposits based on in situ, stress-corrected shear wave velocity. However, the conditions of relatively insufficient case histories and limited site conditions in this approach call for additional data to more reliably define liquefaction resistance as a function of shear wave velocity. In this study, a series of undrained cyclic triaxial tests were conducted on saturated sand with shear wave velocity Vs measured by bender element. By normalizing the data with respect to minimum void ratio, the test results, incorporated with previously published laboratory data, statistically revealed good correlation of cyclic shear strength with small-strain shear modulus for sandy soils, which is almost irrespective of soil types and confining pressures. The consequently determined cyclic resistance ratio, CRR, was found to be approximately proportional to Vs4. Liquefaction resistance boundary curves were established by applying this relationship and compared to liquefaction criteria derived from seismic field measurements. Although in the range of Vs1＞200 m/s the presented curves are moderately conservative, they are remarkably consistent with the published field performance criteria on the whole. |
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| Keywords: | Liquefaction resistance Shear wave velocity Sand Cyclic triaxial test Laboratory correlation Bender element |
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