Earthquakes and Structures

  • 제20권1호
  • /
  • Pages.71-86
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  • 2021
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  • 2092-7614(pISSN)
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  • 2092-7622(eISSN)
테크노프레스 (Techno-Press)
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DOI QR코드

DOI QR Code

Stochastic analysis of the rocking vulnerability of irregular anchored rigid bodies: application to soils of Mexico City

  • Ramos, Salvador (Instituto de Ingenieria, Circuito Escolar, Ciudad Universitaria) ;
  • Arredondo, Cesar (E.R.N. Evaluacion de Riesgos Naturales y Antropogenicos) ;
  • Reinoso, Eduardo (Instituto de Ingenieria, Circuito Escolar, Ciudad Universitaria) ;
  • Leonardo-Suarez, Miguel (Instituto de Ingenieria, Circuito Escolar, Ciudad Universitaria) ;
  • Torres, Marco A. (Instituto de Ingenieria, Circuito Escolar, Ciudad Universitaria)
  • 투고 : 2019.12.28
  • 심사 : 2021.01.09
  • 발행 : 2021.01.25
⟨ 이전 논문 다음 논문 ⟩

초록

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.

키워드

과제정보

The Authors gratefully appreciate the efforts of anonymous reviewers and M.I. Luis Aguilar Ugarte that with their comments, have contributed to improving the results presented herein. The first author is very grateful to the Centro Nacional de Ciencia y Tecnología (CONACyT) for the founding during this study (Scholarship No. 450072, Register No. 608757).

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