• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Mathematical Problems in Engineering >Seismic Fragility Analysis of Steel Liquid Storage Tanks Using Earthquake Ground Motions Recorded in Korea
【24h】

Seismic Fragility Analysis of Steel Liquid Storage Tanks Using Earthquake Ground Motions Recorded in Korea

机译：韩国地震地面运动的钢液体储罐地震脆性分析

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

Liquid-containing storage tanks are important structures in industrial complexes. Because earthquake damages to liquid storage tanks can cause structural collapse, fires, and hazardous material leaks, there have been continuous efforts to mitigate earthquake damages using seismic fragility analysis. In this regard, this study focuses on the seismic responses and fragility of liquid storage tanks. First, the characteristics of earthquake ground motions are a critical factor influencing the seismic fragility of structures; thus, this study employs real earthquake records observed in the target area, southeastern Korea, with the earthquake characteristics estimated based on the ratio of peak ground acceleration to peak ground velocity. When a liquid storage tank oscillates during an earthquake, additional forces can impact the tank wall owing to hydrodynamic pressures. Therefore, this study presents a sophisticated finite element (FE) model that reflects the hydrodynamic effect of an oscillating liquid. Another advantage of such an FE model is that detailed structural responses of the entire wall shells can be estimated; this is not possible in simplified lumped mass or surrogate models. Lastly, probabilistic seismic demand models are derived for three critical limit states: elastic buckling, elephant's foot buckling, and steel yielding. Using the real earthquake ground motion records, constructed FE model, and limit states, a seismic fragility analysis is performed for a typical anchored steel liquid storage tank in Korea. In addition, for comparison purposes, a ring-stiffened model is investigated to derive a seismic fragility curve. The results of the seismic fragility assessment show that elastic buckling is the most vulnerable damage state. In contrast, elephant's foot buckling and steel yielding indicate relatively severe damage levels. Furthermore, it is observed that ring stiffeners decrease the elastic buckling damage, although there is no practical effect on elephant's foot buckling and steel yielding in all ground motion intensities.
机译：含液体储罐是工业综合体中的重要结构。因为对液体储罐的地震损坏可能导致结构崩溃，火灾和危险物质泄漏，因此使用地震脆弱性分析持续努力减轻地震损害。在这方面，本研究侧重于液体储罐的地震反应和脆弱性。首先，地震地面运动的特点是影响结构抗震脆性的关键因素;因此，本研究采用了在韩国东南部地区观察到的真实地震记录，基于峰接地加速与峰值地速度的比率估计的地震特性。当液体储罐在地震期间振荡时，由于流体动力学压力，额外的力会影响罐壁。因此，该研究提出了一种复杂的有限元（Fe）模型，其反映了摆动液体的流体动力学效果。这种Fe模型的另一个优点是可以估计整个壁壳的详细结构应答;这是不可能的简化块状或代理模型。最后，概率的地震需求模型得到了三个关键限制状态：弹性屈曲，大象的脚屈曲和钢。使用实际地震地面运动记录，构造的Fe模型和限制状态，对韩国典型的锚定钢液体储罐进行地震脆弱性分析。另外，为了比较目的，研究了环形加速模型以导出地震脆弱曲线。地震脆弱性评估结果表明，弹性屈曲是最脆弱的损伤状态。相比之下，大象的脚屈曲和钢屈服表明损害水平相对严重。此外，虽然对大象的脚弯曲和钢的所有地面运动强度没有实际影响，但是环形加强件减少了弹性屈曲损伤。

著录项

  • 来源
    《Mathematical Problems in Engineering》 |2019年第16期|6190159.1-6190159.15|共15页
  • 作者

    Lee Sangmok; Kim Byungmin; Lee Young-Joo;

  • 作者单位

    UNIST Sch Urban & Environm Engn Ulsan 44919 South Korea;

    UNIST Sch Urban & Environm Engn Ulsan 44919 South Korea;

    UNIST Sch Urban & Environm Engn Ulsan 44919 South Korea;

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

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