| 离心场中土体图像采集与位移测量系统的研制与应用 |
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| 引用本文： | 胡耘,张嘎,张建民,李焯芬.离心场中土体图像采集与位移测量系统的研制与应用[J].岩土力学,2010,31(3):998-1002. |
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| 作者姓名： | 胡耘 张嘎 张建民 李焯芬 |
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| 作者单位： | 清华大学 水沙科学与水利水电工程国家重点实验室，北京 1000864 |
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| 基金项目： | 国家自然科学基金项目，973基础研究课题 |
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| 摘 要： | 以存储前移为主要思路，开发了离心场中高质量图像高速采集与位移非接触测量系统。该系统由图像采集、数据存储、通讯控制、分析处理和辅助制样5个子系统组成，能够克服高速旋转的离心场的干扰，在离心模型试验过程中高速采集高质量图像。该系统能够对多点同时进行测量，从而得到土体表面任意时刻、任意区域的位移场，并具有对土体无干扰、测量精度高、前期准备工作量小、自动化程度高等优点。使用该系统对土坡破坏离心模型试验中的土坡变形过程进行了测量，结果表明，土坡的破坏过程可分为均匀变形、应变局部化和破坏后变形3个阶段，加载过程中首先在坡顶和坡脚产生应变局部化。
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| 关 键 词： | 离心模型试验 位移 测量 图像 土坡 |
| 收稿时间： | 2008-09-11 |
Development of image capture and displacement measurement system in centrifuge modeling and its application |
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| HU Yun,ZHANG Ga,ZHANG Jian-min,LEE Chack-fan.Development of image capture and displacement measurement system in centrifuge modeling and its application[J].Rock and Soil Mechanics,2010,31(3):998-1002. |
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| Authors: | HU Yun ZHANG Ga ZHANG Jian-min LEE Chack-fan |
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| Institution: | State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China |
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| Abstract: | A kind of image capture and displacement measurement system in centrifuge modeling is developed based on the idea of store forward. The system consists of five subsystems: image capturing subsystem, data storing subsystem, communication subsystem, analysis and processing subsystem, and supporting subsystem. This system can capture high quality images during the centrifuge model test. It can obtain the displacement field at any spot at an arbitrary time of the soil. It has the advantages of high automation, high precision, less preliminary preparation and noninterference to the soil. Using this system, the centrifugal modeling tests are used to conduct the failure process of a cohesive soil slope. The results show that the failure process can be divided into three phases; the strain localizations occur at the top and toe of the slope due to loading application. |
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| Keywords: | centrifuge model test displacement measurement image slope |
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