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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Optimal performance-based design of non-linear stochastic dynamical RC structures subject to stationary wind excitation

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Author(s):
Beck, Andre T. [1] ; Kougioumtzoglou, Ioannis A. [2] ; dos Santos, Ketson R. M. [1]
Total Authors: 3
Affiliation:
[1] Univ Sao Paulo, Sao Carlos Sch Engn, Dept Struct Engn, BR-13566590 Sao Carlos, SP - Brazil
[2] Univ Liverpool, Inst Risk & Uncertainty, Liverpool L69 3GH, Merseyside - England
Total Affiliations: 2
Document type: Journal article
Source: ENGINEERING STRUCTURES; v. 78, p. 145-153, NOV 1 2014.
Web of Science Citations: 20
Abstract

Performance-based design, or performance-based engineering (PBE), is currently well accepted as a proper methodology for assessing risk and designing facilities which can be subject to continuous levels of damage caused by.extreme responses under various hazards of varying magnitudes. However, the difficulties in assessing probabilities associated with different hazard and performance levels, especially when nonlinearity is considered in dynamically excited structural systems, have been a limiting factor for incorporating PBE into design optimization. This paper advances the state-of-the-art by incorporating PBE into the optimal design of non-linear/hysteretic stochastic dynamical systems. The approach combines a statistical linearization technique with time-variant reliability analysis concepts, in order to formulate a total expected life-cycle cost optimization problem. As a numerical example, reinforced concrete buildings modeled as MDOF Bouc-Wen hysteretic systems subjected to wind excitation are studied. Optimal transversal stiffness of the buildings columns are obtained both for the linear and the nonlinear cases, as well as for various design life values. Optimal stiffness values determined herein consider the initial costs but also expected losses over the lifetime of the structure, for several wind hazard magnitudes and displacement response levels of the structure. (C) 2014 Elsevier Ltd. All rights reserved. (AU)

FAPESP's process: 12/14738-9 - Uncertainty quantification in stochastic mechanics: the Wiener path integral treatment
Grantee:André Teófilo Beck
Support Opportunities: Research Grants - Visiting Researcher Grant - International