• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of structural engineering >Comparative Study on Seismic Fragility Assessment of Self-Centering Energy-Absorbing Dual Rocking Core versus Buckling Restrained Braced Systems under Mainshock-Aftershock Sequences
【24h】

Comparative Study on Seismic Fragility Assessment of Self-Centering Energy-Absorbing Dual Rocking Core versus Buckling Restrained Braced Systems under Mainshock-Aftershock Sequences

机译：主持能量吸收双摇摆核心抗震脆弱性评估的比较研究与主轴余震序列下屈曲受限制的支撑系统

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 strong mainshock may cause several aftershocks within a short interval. These aftershocks can make buildings damaged during the mainshock more vulnerable to collapse. Hence, it is critical to study the seismic responses of a structure during aftershock events following a major shock. The focus of this work was to investigate the seismic fragility of an emerging high-performance seismic-resistant system-the self-centering energy-absorbing dual rocking core (SEDRC) system-considering mainshock-aftershock sequences, and to compare SEDRC with traditional systems. First, three- and six-story SEDRC systems were designed following the direct displacement-based design method to show comparable maximum interstory drifts compared with those of the three- and six-story benchmark buckling-restrained braced frames (BRBFs), respectively, under the design-basis earthquake excitations. Second, 30 as-recorded mainshock-aftershock sequences were selected. The dynamic analyses and incremental dynamic analyses (IDAs) were conducted to study the seismic responses of the four buildings with the mainshock inputs alone and the mainshock-aftershock sequence inputs. The analysis results show that the designed SEDRC systems and BRBFs can obtain comparable performance in limiting the maximum interstory drifts (MID) responses, whereas the SEDRC systems are more efficient in limiting the maximum residual interstory drifts (MRD). Moreover, the SEDRC systems perform much better than BRBFs in resisting structural collapse. As expected, the aftershocks would increase the MID, but may increase or decrease the MRD of the SEDRC systems and BRBFs. Finally, the seismic fragilities of the designed systems were further investigated on the basis of the results from the IDAs in a probabilistic framework using a joint probability density function with the consideration of both MID and MRD. The advantages of the SEDRC systems in achieving excellent seismic collapse-resistant and self-centering capacity were explored through probabilistic analyses.
机译：一个强大的主轴可能在短时间内导致几个余震。这些余震可以使建筑物损坏在主斯库克更容易崩溃。因此，在重大休克后研究余震期间结构的地震反应至关重要。这项工作的重点是调查新兴高性能地震抗性系统的地震脆性 - 以自定心能量吸收双摇摆核心（SEDRC）系统 - 考虑主轴 - 余震序列，并与传统系统比较SEDRC 。首先，三层和六层SEDRC系统遵循基于直接位移的设计方法，分别与三层和六层基准屈曲束缚的支撑框架（BRBF）相比表现出可比的最大惰性漂移设计基地地震激励。其次，选择了30个录制的主轴 - 余震序列。进行动态分析和增量动态分析（IDAS）以研究四个建筑物的地震反应单独使用主轴输入和主轴 - 余震序列输入。分析结果表明，设计的SEDRC系统和BRBFS可以在限制最大颠覆漂移（中间）响应时获得可比性的性能，而SEDRC系统在限制最大剩余壁垒漂移（MRD）方面更有效。此外，SEDRC系统在抵抗结构崩溃方面的表现优于BRBF。正如所预期的那样，余震会增加中期，但可能会增加或减少SEDRC系统和BRBFS的MRD。最后，通过考虑MID和MRD的关节概率密度函数，进一步研究设计系统的地震件进一步研究了IDA的结果。 SEDRC系统在实现优异地震抗塌陷和自定心能力方面的优点是通过概率分析来探讨。

著录项

  • 来源
    《Journal of structural engineering》 |2021年第9期|04021124.1-04021124.16|共16页
  • 作者

    Hu Shuling; Wang Wei; Alam M. Shahria;

  • 作者单位

    Tongji Univ State Key Lab Disaster Reduct Civil Engn Shanghai 200092 Peoples R China|Tongji Univ Dept Struct Engn Shanghai 200092 Peoples R China|Univ British Columbia Sch Engn Kelowna BC V1V 1V7 Canada;

    Tongji Univ State Key Lab Disaster Reduct Civil Engn Shanghai 200092 Peoples R China|Tongji Univ Dept Struct Engn Shanghai 200092 Peoples R China;

    Univ British Columbia Sch Engn Resilient & Green Infrastruct Kelowna BC V1V 1V7 Canada;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Self-centering; Rocking core; Mainshock-aftershock sequences; Probabilistic analysis;

    机译：自定心;摇摆核心;主斯克余震序列;概率分析;

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