...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Earthquake Engineering & Structural Dynamics >System identification of a concrete arch dam and calibration of its finite element model
【24h】

System identification of a concrete arch dam and calibration of its finite element model

机译：混凝土拱坝的系统辨识及其有限元模型的校准

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

A magnitude 4.3 earthquake occurred near Pacoima Dam on 13 January 2001. An accelerometer array that had been upgraded after the Northridge earthquake recorded the motion with 17 channels on the dam and the dam-foundation interface. Using this data, properties of the first two modes are found from a system identification study. Modal properties are also determined from a forced vibration experiment performed in 2002 and indicate a significantly stiffer system than is estimated from the 2001 earthquake records. The 2001 earthquake, although small, must have induced temporary nonlinearity. This has implications for structural health monitoring. The source of the nonlinear behaviour is believed to be loss of stiffness in the foundation rock. A finite element model of Pacoima Dam is constructed and calibrated to match modal properties determined from the system identification study. A dynamic simulation of the 2001 earthquake response produces computed motions that agree fairly well with the recorded ones.
机译：2001年1月13日在Pacoima大坝附近发生了4.3级地震。在Northridge地震后升级的加速度计阵列记录了大坝和大坝基础界面上的17条通道的运动。使用这些数据，可以从系统识别研究中找到前两种模式的属性。模态特性也可以根据2002年进行的强迫振动实验确定，其模态比2001年地震记录所估计的要硬得多。 2001年的地震虽然很小，但一定会引起暂时的非线性。这对结构健康监测有影响。非线性行为的根源被认为是基础岩石的刚度损失。构建并校准Pacoima大坝的有限元模型，以匹配从系统识别研究确定的模态特性。对2001年地震反应的动态模拟产生了与所记录的运动非常吻合的计算运动。

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