期刊
JOURNAL OF INTELLIGENT MATERIAL SYSTEMS AND STRUCTURES
卷 27, 期 3, 页码 418-426出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/1045389X15610909
关键词
smart aggregate; lead zirconate titanate; compressive stress; charge amplifier; seismic monitoring
资金
- National Nature Science Foundation of China [91315301-09]
- Provincial Education Department of Liaoning Province of China [L2013020]
The potential of smart aggregate for seismic stress monitoring has been identified, but only moderate dynamic stress of relatively high frequency can be measured reliably due to the limitations of conventional charge amplifiers. To improve the performance of smart aggregate-based monitoring systems, a charge amplifier was designed especially for the demands of seismic stress monitoring. Its performance was tested in the low frequency range down to 0.05Hz with high charge input up to 2x10(7)pC representing stress up to 100MPa by feeding it frequency-sweep charge signals. With the specially designed amplifier, the performance of the smart aggregate-based monitoring system was tested in both frequency-sweep and amplitude-sweep loading tests, and the influence of lead zirconate titanate depolarization was evaluated at static loads of 4.8, 14.4, and 24MPa. The results show that the demands of seismic monitoring with a smart aggregate-based system can be satisfied, and that the sensitivity of the system remains constant under dynamic loads up to at least 45MPa.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据