• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>World conference on earthquake engineering >PHYSICAL DUCTILITY DEMAND SPECTRA FOR EARTHQUAKE GROUND MOTIONS CONTAINING SEVERE PULSES
【24h】

PHYSICAL DUCTILITY DEMAND SPECTRA FOR EARTHQUAKE GROUND MOTIONS CONTAINING SEVERE PULSES

机译：含有严重脉冲的地震地面运动的物理延展性需求谱

获取原文
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Earthquake (EQ) Structural analysis and design require a reliable estimation of the demands, in particular for the appropriate application of Performance Based Seismic Design (PBSD). For a given EQ the ground motions recorded on rock are different from those obtained in soft soil, even for the same epicentral distance. EQ Ground Motions (EQGMs) recorded close and normal to the fault differ from those recorded close but parallel to the fault and both are different from those recorded far from the fault. It is known that EQGMs recorded close to the fault show severe pulses that have been the cause of severe Structural damage. This fact is considered only partially by current codes which recommend the use of near fault factors that affect only the required base shear. For Inelastic design those codes recommend to reduce the elastic spectral amplitude by reduction factors that are constant for all the periods. The validity of this procedure has been questioned and shown to be inadequate. The objectives of this investigation were to determine a procedure to identify severe pulses in EQGMs recorded close or far from the fault. Then, to study the effects of those pulses on the elastic and inelastic response of Single Degree of Freedom (SDOF) structures. Later, it was demonstrated that the cyclic ductility ratio allows to obtain a reliable inelastic demand spectra. Finally, Physical Ductility Spectra (PDS) are presented for EQGM records obtained close and far from the fault. It is demonstrated that PDS offer a more reliable estimation of inelastic displacement demands.
机译：地震（EQ）结构分析和设计需要可靠地估计需求，特别是适当应用基于性能的地震设计（PBSD）。对于给定的EQ，岩石上的地面运动与软土中获得的地面不同，即使对于相同的震中距离也是如此。 EQ接地运动（EQGMS）仔细且正常到故障的常规与录制关闭但与故障平行的相差不同，两者都与录制的故障不同。众所周知，记录的EQGMS接近故障显示出严重的脉冲，这是严重的结构损伤的原因。这一事实仅被当前代码被认为是推荐使用影响所需底剪的近的故障因素。对于非弹性设计，这些代码建议通过对所有周期的恒定的减少因子降低弹性谱幅度。此程序的有效性受到质疑，并显示不足。本调查的目标是确定识别记录近或远离故障的EQGMS中严重脉冲的程序。然后，为了研究这些脉冲对单一自由度（SDOF）结构的弹性和非弹性响应的影响。后来，证明循环延展性比允许获得可靠的无弹性需求光谱。最后，呈现出用于近距离的EQGM记录的物理延展谱（PDS）。证明PDS提供了更可靠的无弹性位移需求估算。

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