• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>NDT & E international >Acoustoelastic effects on the resonance frequencies of prestressed concrete beams-Short-term measurements
【24h】

Acoustoelastic effects on the resonance frequencies of prestressed concrete beams-Short-term measurements

机译：声弹对预应力混凝土梁共振频率的影响-短期测量

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

In this study resonant acoustic spectroscopy was applied during static loading and unloading of three prestressed concrete beams in the context of acoustoelasticity. At each load step multiple modes of vibration were measured using an accelerometer and a small impact source. It was found that the measured resonance frequencies increased with increasing compressive stress in a manner which can be predicted using a non-linear finite element model based on Murnaghan's third order elastic theory. Previous results from experimental studies on concrete bridges indicate that measured structural resonance frequencies increase with increasing prestress forces. These results have been difficult to explain theoretically and the results from this study can possibly provide a new theoretical basis for the observed stress dependency of the resonance frequencies of concrete structures. Furthermore, the results indicate that a change in the state of stress in a concrete structure can be detected or monitored by measuring one or several resonance frequencies.
机译：在这项研究中，在声弹性的情况下，在三个预应力混凝土梁的静态加载和卸载过程中应用了共振声谱。在每个负载步骤，都使用加速度计和小型冲击源测量了多种振动模式。结果发现，测得的共振频率随着压应力的增加而增加，这种方式可以使用基于Murnaghan的三阶弹性理论的非线性有限元模型来预测。混凝土桥梁实验研究的先前结果表明，测得的结构共振频率随预应力的增加而增加。这些结果在理论上很难解释，这项研究的结果可能为混凝土结构共振频率的应力相关性提供新的理论基础。此外，结果表明，可以通过测量一个或多个共振频率来检测或监视混凝土结构中应力状态的变化。

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