...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of earthquake engineering >Significance of non-stationary characteristics of ground-motion on structural damage: shaking table study
【24h】

Significance of non-stationary characteristics of ground-motion on structural damage: shaking table study

机译：地面运动对结构损伤的非静止特征的意义：摇摆表研究

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 reports the results of a set of benchmark medium-scale shaking table tests to investigate the significance of the non-stationary characteristics of ground-motion on nonlinear dynamic responses and the structural damage of reinforced concrete (RC) columns. To examine the influence of ground-motion characteristics, four RC columns are tested under (1) near-field without pulse, (2) near-field pulse-like, and (3) far-field ground-motions. These ground-motion records were spectrally matched by the reweighted Volterra series algorithm without changing non-ergodic characteristics. To explore the confinement effects, two sets of column specimens are designed to represent the modern well-confined and older lightly-confined RC columns. Each column is tested in slight, extensive and complete damage limit states. Then aftershock excitations are conducted to investigate the performance of severely damaged RC columns. Low amplitude white-noise tests are conducted on pristine columns and after each damage limit state experiment to detect natural frequency variant of damaged columns using transfer function estimate. Furthermore, using time-frequency analysis, the real-time variant frequency of test specimens is estimated. The significant duration of ground-motions accounting for the effect of non-stationary characteristics of ground-motion is also estimated by time-cumulative damage analysis of the test results. Finally, the time-variant stiffness degradation of RC columns is estimated.
机译：本文报道了一套基准中型振动台测试的结果，以研究地面运动对非线性动力响应的非静止特性以及钢筋混凝土（RC）柱的结构损伤的重要性。为了检查地运动特性的影响，在没有脉冲的近场（1）近场测试四个RC柱，（2）近场脉冲状，（3）远场地面运动。这些地面运动记录通过重新重量的Volterra系列算法进行光谱匹配而不改变非遍历特性。为了探索监禁效果，两组柱样本旨在代表现代狭窄和较旧的轻微狭窄的RC列。每列在轻微，广泛和完全损坏的限制状态下进行测试。然后进行余震激发以研究严重受损的RC柱的性能。低幅度白噪声测试在原始柱上进行，并在每个损伤限制状态实验后使用传递函数估计检测损坏柱的固有频率变体。此外，使用时频分析，估计测试样品的实时变量频率。还通过对测试结果的时间累积损伤分析估算了对地面运动非静止特性效果的显着持续时间。最后，估计RC列的时变刚度降低。

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