...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Bulletin of earthquake engineering >Changes in dynamic characteristics of Lorca RC buildings from pre- and post-earthquake ambient vibration data
【24h】

Changes in dynamic characteristics of Lorca RC buildings from pre- and post-earthquake ambient vibration data

机译：根据震前和震后环境振动数据对Lorca RC建筑物的动力特性的变化

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 estimates fundamental translational period and damping ratio parameters and examines the changes in dynamic characteristics of a set of low-to-medium rise buildings in Lorca town (SE of Spain) affected by the May 11th, 2011 earthquake. These building parameters have been calculated analysing structural dynamic response from ambient vibration measurements recorded at top RC buildings pre- and post earthquake, using the Fast Fourier Transform and the Randomdec technique. The empirical expression relating period (T) and number of floor (N) here obtained analysing ambient noise recorded on 59 healthy buildings before the earthquake is T = (0.054 ± 0.002) N, very similar to others empirical period-height relationships obtained for RC structures in the European built environment but quite different from code provisions. Measurements performed in 34 damaged buildings show a period elongation after the quake according to T ~? = (0.075 ± 0.002) N expression. Moreover, we found a rise of the fundamental period with the EMS's grade of damage of buildings. In contrast to natural frequency, damping ratio (ξ) do not shows a significant variation with earthquake damage degree and the product ξ T remains near constant.
机译：本文估算了基本的平移周期和阻尼比参数，并研究了受2011年5月11日地震影响的洛卡镇（西班牙东南部）的一组中低层建筑的动力特性变化。这些建筑物参数是使用快速傅里叶变换和Randomdec技术通过分析地震前和地震后在顶级RC建筑物中记录的环境振动测量值来分析结构动力响应后计算得出的。此处，分析地震前记录在59栋健康建筑上的环境噪声而获得的与周期（T）和层数（N）相关的经验表达式为T =（0.054±0.002）N，这与RC获得的其他经验周期-高度关系非常相似欧洲建筑环境中的结构，但与规范规定大不相同。在34座受损建筑物中进行的测量表明，根据T〜?，地震后的时间延长。 =（0.075±0.002）N表达式。此外，我们发现基本阶段随着EMS对建筑物的破坏等级而上升。与自然频率相反，阻尼比（ξ）随地震破坏程度没有显着变化，并且乘积ξT保持接近恒定。

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