• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Key Engineering Materials >Measurement of Low-Amplitude Hysteresis Behaviour of Concrete by High-Precision Vibrating Wire Strain Gauges
【24h】

Measurement of Low-Amplitude Hysteresis Behaviour of Concrete by High-Precision Vibrating Wire Strain Gauges

机译：高精度振弦式应变仪测量混凝土的低振幅滞后行为

获取原文
获取原文并翻译 | 示例
       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper describes the development and use of a vibrating wire strain gauge for measuring very small strains in concrete elements. Conventional electrical resistance gauges are inadequate for this application because they do not provide sufficient resolution and are difficult to attach to concrete specimens. Vibrating wire gauges are more sensitive, but are prone to significant errors due to temperature changes. In the purpose-built gauges described here, temperature correction is achieved using an unstrained reference gauge. The vibration data are analysed using a moving-window Fourier transform in order to identify and remove the geometrically non-linear portion of the response. The resulting system is economical, easy to use and gives an accuracy of around 0.5 microstrain. The gauges have been used to measure the low-amplitude hysteresis characteristics of cracked concrete specimens. This information is required in order to model the non-linear response of a damaged concrete structure to a small load, such as might be applied in a damage assessment technique. Typical results are presented and discussed.
机译：本文介绍了用于测量混凝土构件中很小应变的振弦式应变仪的开发和使用。常规的电阻计不足以用于该应用，因为它们不能提供足够的分辨率并且难以附着到混凝土试样上。振动线规更灵敏，但由于温度变化而容易产生重大误差。在此处所述的专用仪表中，使用无应变的参考仪表可实现温度校正。使用移动窗口傅立叶变换对振动数据进行分析，以识别和消除响应的几何非线性部分。所得系统经济，易于使用，并且精度约为0.5微应变。该量规已用于测量破裂混凝土试样的低振幅磁滞特性。需要此信息以便对损坏的混凝土结构对小载荷的非线性响应进行建模，例如可能在损坏评估技术中应用的信息。提出并讨论了典型结果。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号