• 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;WCEE >EFEFCTS OF GROUND MOTION UNCERTAINTY ON PREDICTINGTHE RESPONSE OF AN EXISTING RC FRAME STRUCTURE
【24h】

EFEFCTS OF GROUND MOTION UNCERTAINTY ON PREDICTINGTHE RESPONSE OF AN EXISTING RC FRAME STRUCTURE

机译：地面运动不确定性在预测现有RC框架结构响应中的作用

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

摘要

Estimation of structural response may be significantly affected by the representation of seismic groundmotion uncertainty. A complete probabilistic presentation of ground motion can be constructed byspecifying a stochastic model that depends on seismic source parameters. Alternatively, the groundmotion uncertainty can be represented by adopting parameters known as the intensity measures (IM), andusing attenuation relationships to relate the IM to seismic source parameters. The uncertainty in theprediction of structural response can be expressed in terms of the probability of exceeding a given valueof the structural response. In this study, the uncertainty in the ground motion is represented in these twoalternative ways: (a) a full probabilistic representation using an advanced simulation technique known assubset simulation (Au [4]) based on a stochastic ground motion model conditional on magnitude anddistance proposed by Atkinson and Silva (Atkinson [3]), and, (b) by adopting spectral acceleration at thesmall amplitude fundamental period as the intensity measure. In alternative (b), a suite of ground motionrecordings are used to represent ground motion characteristics not already captured by the IM. Theattenuation relation relating the IM to the seismic source parameters is obtained by two alternativeapproaches: (I) by simulating stochastic ground motions and applying them to an elastic SDOF systemand (ii) by using the empirical regression equation of Abrahamson and Silva (1997). The alternativeapproaches are compared based on their prediction of the uncertainty in structural response. Anothercomparison is done between the following two cases: (1) by predicting the structural response followingalternative (b) and using a suite of real ground motion recordings and (2) by predicting the structuralresponse following alternative (b) and using a suite of synthetic records. The suite of synthetic records aregenerated according to the same stochastic model used in alternative (a) for a given magnitude anddistance; this provides a common basis for comparisons. In order to emulate selection of a suite of realrecords from a bin, alternative (a) and case (2) of alternative (b) described above are repeated using asuite of synthetic records generated for magnitude and distance as uncertain variables belonging to adesignated bin. An existing 7-story reinforced concrete structure is used as a case-study. The structuralmodel (Jalayer [9]) includes stiffness and strength degradation.
机译：地震地震动不确定性的表示可能会严重影响结构响应的估计。可以通过指定依赖于地震震源参数的随机模型来构造地动的完整概率表示。或者，可以通过采用称为强度测度（IM）的参数并使用衰减关系将IM与地震源参数相关联来表示地震动不确定性。结构响应预测中的不确定性可以用超过给定结构响应值的概率表示。在这项研究中，地面运动的不确定性通过以下两种替代方式表示：（a）使用先进的模拟技术（称为子集模拟（Au [4]），基于提出的大小和距离为条件的随机地面运动模型，完整地表示概率由Atkinson和Silva（Atkinson [3]）提出，并且（b）采用小幅度基频周期的频谱加速度作为强度度量。在备选方案（b）中，一组地面运动记录用于表示IM尚未捕获的地面运动特征。将IM与地震源参数相关的衰减关系可以通过两种替代方法获得：（I）模拟随机地面运动并将其应用于弹性SDOF系统;（ii）使用Abrahamson和Silva（1997）的经验回归方程。根据对结构响应不确定性的预测来比较备选方案。在以下两种情况之间进行了另一种比较：（1）通过预测备选方案（b）之后的结构响应并使用一组实际地震动记录，以及（2）通过预测遵循备选方案（b）的结构响应并使用一组综合记录。根据给定的幅度和距离，根据备选方案（a）中使用的相同随机模型生成一组综合记录；这提供了比较的通用基础。为了模拟从箱中选择一组真实记录，使用针对幅度和距离生成的一组合成记录作为属于指定箱的不确定变量，重复上述的备选（a）和备选（b）的情况（2）。案例研究使用现有的7层钢筋混凝土结构。结构模型（Jalayer [9]）包括刚度和强度下降。

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