Fatigue behavior of diamond bird-beak T-joints and design recommendations

L. W. Tong; G. W. Xu; Y. Q. Liu; D. Q. Yan; Xiao Lin Zhao

doi:10.1201/9781351210843-57

Fatigue behavior of diamond bird-beak T-joints and design recommendations

L. W. Tong, G. W. Xu, Y. Q. Liu, D. Q. Yan, Xiao Lin Zhao

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

Abstract

A Diamond Bird-Beak T-joint (DBB T-joint) is a new type of welded joints made of Square Hollow Section (SHS) members, different from a conventional SHS T-joint for rotating both chord and brace by 45°. This paper presents a series of research on fatigue behavior of DBB T-joints. Static hot spot stress testing was firstly carried out on a set of DBB T-joints under brace loading. Compared with conventional SHS T-joints, DBB T-joints have much lower SCFs. FE analysis on SCFs was then performed for further parametric study, so that SCF formulae were obtained by multiple regressive analyses. Fatigue tests were conducted to explore crack patterns, failure modes and fatigue lives of DBB T-joints. For the need of fatigue design, new fatigue design curves (S-N curves) in terms of hot spot stress ranges were recommended. It is concluded that DBB T-joints have longer fatigue lives than conventional SHS T-joints.

Original language	English
Title of host publication	Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017
Editors	Amin Heidarpour, Xiao-Ling Zhao
Publisher	CRC Press/Balkema
Pages	449-456
Number of pages	8
ISBN (Print)	9780815381341
DOIs	https://doi.org/10.1201/9781351210843-57
Publication status	Published - 2018
Externally published	Yes
Event	16th International Symposium on Tubular Structures, ISTS 2017 - Melbourne, Australia Duration: 4 Dec 2017 → 6 Dec 2017

Publication series

Name	Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017

Conference

Conference	16th International Symposium on Tubular Structures, ISTS 2017
Country/Territory	Australia
City	Melbourne
Period	4/12/17 → 6/12/17

ASJC Scopus subject areas

Civil and Structural Engineering
Building and Construction

More information

10.1201/9781351210843-57

Cite this

Tong, L. W., Xu, G. W., Liu, Y. Q., Yan, D. Q., & Zhao, X. L. (2018). Fatigue behavior of diamond bird-beak T-joints and design recommendations. In A. Heidarpour, & X.-L. Zhao (Eds.), Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017 (pp. 449-456). (Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017). CRC Press/Balkema. https://doi.org/10.1201/9781351210843-57

Tong, L. W. ; Xu, G. W. ; Liu, Y. Q. et al. / Fatigue behavior of diamond bird-beak T-joints and design recommendations. Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017. editor / Amin Heidarpour ; Xiao-Ling Zhao. CRC Press/Balkema, 2018. pp. 449-456 (Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017).

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title = "Fatigue behavior of diamond bird-beak T-joints and design recommendations",

abstract = "A Diamond Bird-Beak T-joint (DBB T-joint) is a new type of welded joints made of Square Hollow Section (SHS) members, different from a conventional SHS T-joint for rotating both chord and brace by 45°. This paper presents a series of research on fatigue behavior of DBB T-joints. Static hot spot stress testing was firstly carried out on a set of DBB T-joints under brace loading. Compared with conventional SHS T-joints, DBB T-joints have much lower SCFs. FE analysis on SCFs was then performed for further parametric study, so that SCF formulae were obtained by multiple regressive analyses. Fatigue tests were conducted to explore crack patterns, failure modes and fatigue lives of DBB T-joints. For the need of fatigue design, new fatigue design curves (S-N curves) in terms of hot spot stress ranges were recommended. It is concluded that DBB T-joints have longer fatigue lives than conventional SHS T-joints.",

author = "Tong, \{L. W.\} and Xu, \{G. W.\} and Liu, \{Y. Q.\} and Yan, \{D. Q.\} and Zhao, \{Xiao Lin\}",

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year = "2018",

doi = "10.1201/9781351210843-57",

language = "English",

isbn = "9780815381341",

series = "Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017",

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Tong, LW, Xu, GW, Liu, YQ, Yan, DQ & Zhao, XL 2018, Fatigue behavior of diamond bird-beak T-joints and design recommendations. in A Heidarpour & X-L Zhao (eds), Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017. Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017, CRC Press/Balkema, pp. 449-456, 16th International Symposium on Tubular Structures, ISTS 2017, Melbourne, Australia, 4/12/17. https://doi.org/10.1201/9781351210843-57

Fatigue behavior of diamond bird-beak T-joints and design recommendations. / Tong, L. W.; Xu, G. W.; Liu, Y. Q. et al.
Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017. ed. / Amin Heidarpour; Xiao-Ling Zhao. CRC Press/Balkema, 2018. p. 449-456 (Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017).

Research output: Chapter in book / Conference proceeding › Conference article published in proceeding or book › Academic research › peer-review

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AU - Zhao, Xiao Lin

PY - 2018

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N2 - A Diamond Bird-Beak T-joint (DBB T-joint) is a new type of welded joints made of Square Hollow Section (SHS) members, different from a conventional SHS T-joint for rotating both chord and brace by 45°. This paper presents a series of research on fatigue behavior of DBB T-joints. Static hot spot stress testing was firstly carried out on a set of DBB T-joints under brace loading. Compared with conventional SHS T-joints, DBB T-joints have much lower SCFs. FE analysis on SCFs was then performed for further parametric study, so that SCF formulae were obtained by multiple regressive analyses. Fatigue tests were conducted to explore crack patterns, failure modes and fatigue lives of DBB T-joints. For the need of fatigue design, new fatigue design curves (S-N curves) in terms of hot spot stress ranges were recommended. It is concluded that DBB T-joints have longer fatigue lives than conventional SHS T-joints.

AB - A Diamond Bird-Beak T-joint (DBB T-joint) is a new type of welded joints made of Square Hollow Section (SHS) members, different from a conventional SHS T-joint for rotating both chord and brace by 45°. This paper presents a series of research on fatigue behavior of DBB T-joints. Static hot spot stress testing was firstly carried out on a set of DBB T-joints under brace loading. Compared with conventional SHS T-joints, DBB T-joints have much lower SCFs. FE analysis on SCFs was then performed for further parametric study, so that SCF formulae were obtained by multiple regressive analyses. Fatigue tests were conducted to explore crack patterns, failure modes and fatigue lives of DBB T-joints. For the need of fatigue design, new fatigue design curves (S-N curves) in terms of hot spot stress ranges were recommended. It is concluded that DBB T-joints have longer fatigue lives than conventional SHS T-joints.

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Y2 - 4 December 2017 through 6 December 2017

ER -

Tong LW, Xu GW, Liu YQ, Yan DQ, Zhao XL. Fatigue behavior of diamond bird-beak T-joints and design recommendations. In Heidarpour A, Zhao XL, editors, Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017. CRC Press/Balkema. 2018. p. 449-456. (Tubular Structures XVI - Proceedings of the 16th International Symposium on Tubular Structures, ISTS 2017). doi: 10.1201/9781351210843-57

Fatigue behavior of diamond bird-beak T-joints and design recommendations

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