Investigation on cumulative displacement of tension-only metallic yielding dissipators. (15th June 2023)

• Record Type: Journal Article
• Authors: Gu, Zi; Lu, Wensheng; Gao, Yuqing
• Is Part Of: Engineering structures. Volume 285(2023)
• Publication Date: 2023-06-15
• Subjects: Tension-only brace -- Yielding dissipator -- Cumulative displacement -- Computational algorithm -- Vibration control; Structural engineering -- Periodicals; Structural analysis (Engineering) -- Periodicals; Construction, Technique de la -- Périodiques; Génie parasismique -- Périodiques; Pression du vent -- Périodiques; Earthquake engineering; Structural engineering; Wind-pressure; Periodicals; 624.105
• DOI: 10.1016/j.engstruct.2023.115985
• Languages: English
• ISSNs: 0141-0296

Abstract

Highlights: The cumulative displacement issues of tension-only metallic yielding dissipators are raised, where intruded length l i n and dissipative member strain ε T O B are considered as the key parameters. Considering the influence of the cumulative displacement, the theoretical model and computational algorithm of l i n and ε T O B are proposed. The l i n and ε T O B can be depicted by a quadratic equation, and mathematical principles behind this law are also revealed. Abstract: This paper investigates a cumulative displacement issue on the tension-only metallic yielding dissipators (TMYDs). Two potential risks caused by cumulative displacement are pointed out, namely (1) the intruded length issue, which could result in the dissipator's failure to degrade to an ordinary tension-only brace, and (2) the dissipative member strain issue, which could lead to the dissipator fracture. Theoretical models of the TMYDs, and computational algorithms of intruded length and dissipative member strain are proposed considering cumulative displacement in three types of TMYD, i.e., asymmetrical elastic–plastic dissipator (AEPD), hook-no-damage dissipator (HNDD), and self-centering dissipator (SCD). Accordingly, three finite element models are built up for nonlinear time history analysis, where intruded length and dissipative member strain are computed. From the results, cumulative displacement is proved to be important in designing the dissipators, and TMYDs may have the potential risk of failing while the structure is under earthquakes, exposing the structure to unpredictable danger.