不规则锚固刚体摇晃脆弱性的随机分析:在墨西哥城土体中的应用

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY
S. Ramos, C. Arredondo, E. Reinoso, M. Leonardo-Suárez, Marco A. Torres
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引用次数: 0

摘要

本文主要研究了考虑场地条件和墨西哥城地震活动性的不规则几何形状和非均匀质量分布的刚性锚固块体摇晃响应的预期损伤的开发和评估。考虑了约束体的非线性特性,对纯拉伸破坏机制和拉剪破坏机制进行了评价。使用基于物理的地面运动模拟,执行了一个概率框架,涵盖了广泛的块大小,长细比和偏心。为了考虑远场地震传播的不确定性对研究地点的地震危险性有重要贡献,采用小地震记录的随机求和方法模拟了一组情景,并将其视为经验格林函数(EGFs)。采用经车身长细归一化的最大块体旋转绝对值作为峰值地面加速度的函数作为工程需求参数(EDP)。结果表明:长细比在2 ~ 3之间锚固效果较好,长细比在4以上锚固效果较好;此外,在一定的峰值强度范围内,位于软土中的锚固块体相对于位于硬土中的锚固块体更不容易受到破坏。这里使用的程序允许对不同类型内容的风险,可靠性和弹性评估做出决策,并且很容易适应其他地震环境。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Stochastic analysis of the rocking vulnerability of irregular anchored rigid bodies: application to soils of Mexico City
This paper focuses on the development and assessment of the expected damage for the rocking response of rigid anchored blocks, with irregular geometry and non-uniform mass distribution, considering the site conditions and the seismicity of Mexico City. The non-linear behavior of the restrainers is incorporated to evaluate the pure tension and tension-shear failure mechanisms. A probabilistic framework is performed covering a wide range of block sizes, slenderness ratios and eccentricities using physics-based ground motion simulation. In order to incorporate the uncertainties related to the propagation of far-field earthquakes with a significant contribution to the seismic hazard at study sites, it was simulated a set of scenarios using a stochastic summation methods of small-earthquakes records, considered as Empirical Green's Function (EGFs). As Engineering Demand Parameter (EDP), the absolute value of the maximum block rotation normalized by the body slenderness, as a function of the peak ground acceleration (PGA) is adopted. The results show that anchorages are more efficient for blocks with slenderness ratio between two and three, while slenderness above four provide a better stability when they are not restrained. Besides, there is a range of peak intensities where anchored blocks located in soft soils are less vulnerable with respect to those located in firm soils. The procedure used in here allows to take decisions about risk, reliability and resilience assessment of different types of contents, and it is easily adaptable to other seismic environments.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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