Probabilistic performance assessment of inelastic wind excited structures within the setting of distributed plasticity. (May 2020)

• Record Type: Journal Article
• Authors: Chuang, Wei-Chu; Spence, Seymour M.J.
• Is Part Of: Structural safety. Volume 84(2020)
• Publication Date: 2020-05
• Subjects: Inelastic wind response -- Dynamic shakedown -- Distributed plasticity -- Fiber models -- Performance-based wind engineering -- Uncertainty propagation; Structural stability -- Periodicals; Safety factor in engineering -- Periodicals; Reliability (Engineering) -- Periodicals; Constructions -- Stabilité -- Périodiques; Coefficient de sécurité en ingénierie -- Périodiques; Fiabilité -- Périodiques; 620.86
• DOI: 10.1016/j.strusafe.2020.101923
• Languages: English
• ISSNs: 0167-4730

Abstract

Highlights: A framework for the inelastic assessment of wind excited structures is proposed. Safety against collapse is defined through reaching the state of dynamic shakedown. A fiber-based formulation is derived for estimating inelastic response at shakedown. The model is coupled with stochastic simulation for failure probability estimation. A case study is presented demonstrating the potential of the proposed framework. Abstract: The increasing interest in applying performance-based design to structures subject to severe wind has created the need for tools that can be used for the identification of appropriate probabilistic performance-based criteria for wind. This paper outlines the development of a framework to this end, which is based on describing safety against collapse through the occurrence of the state of dynamic shakedown. In particular, a formulation is introduced that enables the direct estimation of the inelastic strains and deformations occurring at shakedown for structural systems discretized through fiber-based distributed plasticity models and subject to stochastic wind loads. The efficiency of the proposed approach allows stochastic simulation to be employed in estimating the probability of system-level failure defined through general local and global limit states. A case study is presented illustrating how typical wind excited structural systems have significant plastic reserves that could be used in defining performance-based criteria for wind.