Effect of P-delta uncertainty on the seismic collapse capacity and its variability of single-degree-of freedom systems

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• 作者：Styliani Tsantaki (1)
  Luis F. Ibarra (2)
  Christoph Adam (1)
  
  1. Unit of Applied Mechanics ; University of Innsbruck ; Technikerstr. 13 ; 6020 ; Innsbruck ; Austria
  2. Civil and Environmental Engineering ; University of Utah ; Salt Lake City ; UT ; 84112 ; USA
  
• 关键词：Collapse capacity ; Parameter uncertainty ; First ; order ; second ; moment method ; Latin hypercube sampling ; P ; delta effect
• 刊名：Bulletin of Earthquake Engineering
• 出版年：2015
• 出版时间：April 2015
• 年：2015
• 卷：13
• 期：4
• 页码：1205-1225
• 全文大小：1,064 KB
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• 刊物类别：Earth and Environmental Science
• 刊物主题：Earth sciences
  Geotechnical Engineering
  Civil Engineering
  Geophysics and Geodesy
  Hydrogeology
  Structural Geology
  
• 出版者：Springer Netherlands
• ISSN：1573-1456

文摘

This study assesses the effect of parameter uncertainty of non-deteriorating P-delta vulnerable single-degree-of-freedom systems on the median and dispersion of the collapse capacity. The post-yielding negative slope is a necessary condition of P-delta induced collapse that dominates the failure mode, and thus, it is the primary system parameter to be considered as a random variable. The parameter uncertainty on the collapse capacity is quantified with the first-order-second-moment method, and verified with the Latin hypercube sampling (LHS) technique. The total variability of the collapse capacity is estimated by combining the parameter uncertainty with record-to-record variability according to the square-root-of-sum-of-squares rule. Alternatively, the total variability of the collapse capacity is obtained from LHS realizations that simultaneously account for uncertainty of the post-yielding negative stiffness ratio and the earthquake excitation. The importance of uncertain post-yielding negative slope on the collapse capacity is underlined, and the main observations of the parameter uncertainty and total uncertainty of the collapse capacity are discussed.