| 动力离心试验常规点位式量测技术改进方法 |
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| 引用本文： | 王永志,袁晓铭,王 海.动力离心试验常规点位式量测技术改进方法[J].岩土力学,2015,36(Z2):722-728. |
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| 作者姓名： | 王永志 袁晓铭 王 海 |
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| 作者单位： | 1. 中国地震局工程力学研究所 地震工程与工程振动重点实验室，黑龙江 哈尔滨 150080； 2. 加州大学戴维斯分校 土工模拟中心，加州，美国 95616 |
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| 基金项目： | 中央级公益性研究所基本科研业务费专项（No. 2014B09）；国家自然科学基金（No. 41272357）。 |
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| 摘 要： | 动力离心试验的先进性和有效性已在国内外岩土地震工程界形成广泛共识，但其优越性的充分发挥需要可靠量测技术作为基础。总结了动力离心试验点位式量测技术常发生的故障形式，探讨了孔隙水压、加速度和位移3种常规点位式传感器设计和量测改进方法，用以提高试验数据可靠性，采用分体式结构孔隙水压力计增强了故障应急能力和试验可控性，用真空去离子饱和法提高透水石饱和速率和质量，加速度计采用分体式结构，提高了试验操作性和核心元件利用率，采用橡胶密封技术减小了动荷载中沉降和倾斜发生率。提出加速度计和位移计联合测试与布设方法，可以获取更为准确的土体内侧向位移变化过程，具有较好灵活性。
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| 关 键 词： | 动力离心试验 量测技术 传感器 可靠性 改进方法 |
| 收稿时间： | 2014-12-03 |
Improvement method of node-oriented measurement technique for dynamic centrifuge modeling |
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| WANG Yong-zhi,YUAN Xiao-ming,WANG Hai.Improvement method of node-oriented measurement technique for dynamic centrifuge modeling[J].Rock and Soil Mechanics,2015,36(Z2):722-728. |
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| Authors: | WANG Yong-zhi YUAN Xiao-ming WANG Hai |
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| Institution: | 1. Key Laboratory of Earthquake Engineering and Engineering Vibration, Institute of Engineering Mechanics, China Earthquake Administration, Harbin, Heilongjiang 150080, China; 2. Center for Geotechnical Modeling, University of California at Davis, Davis CA 95616, America |
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| Abstract: | Dynamic centrifuge modeling has become a generally domestic and international acknowledgement of advancement and effectiveness in geotechnical earthquake engineering. However, its realization of superiority is inseparable from reliable measurement techniques. The common failure forms of node-oriented measurement techniques in dynamic centrifuge modeling are summarized, including discussing three types of conventional node-oriented transducers for pore water pressure, acceleration and displacement to increase reliability of test results by optimizing design and improving measurement. Via separable configuration, the emergency capability and controllability of pore pressure transducer are enhanced while the saturation quality and rate of porous stone using new technique of vacuum deionized-water saturation are advanced. The workability of accelerometer with utilization of core element increased rises using a type of separable configuration; and a rubber cover seal technique is established to reduce probability of settlement and inclination during seismic loading. A combined measurement technique of accelerometer and displacement transducer is proposed, be able to gain high accuracy of internal lateral soil displacement variation with better flexibility of placement. |
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| Keywords: | dynamic centrifuge test measurement technique transducer reliability improvement method |
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