TY - JOUR
T1 - Strength predictions of circular hollow section T-joints of steel grade 1100 MPa
AU - Cai, Yancheng
AU - Chan, Tak Ming
AU - Young, Ben
N1 - Funding Information:
The authors are grateful to Rautaruukki for supplying the cold-formed high strength steel test specimens. Thanks are due to Wo Lee Steel Co. Ltd. (Hong Kong) for using their welding facilities. The research work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. 17210218 ).
Funding Information:
The authors are grateful to Rautaruukki for supplying the cold-formed high strength steel test specimens. Thanks are due to Wo Lee Steel Co. Ltd. (Hong Kong) for using their welding facilities. The research work described in this paper was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China (Project No. 17210218).
Publisher Copyright:
© 2021 Elsevier Ltd
PY - 2022/1
Y1 - 2022/1
N2 - This paper presents experimental and numerical investigations of cold-formed high strength steel (CFHSS) circular hollow section (CHS) T-joints. The CFHSS CHS members have nominal 0.2% proof stress of 1100 MPa. The geometric parameters of the T-joints were designed by varying the ratios of β, 2γ and τ. A total of twelve T-joint tests were conducted by applying axial compressive load through the braces without preloading in chords. Non-linear finite element (FE) model was then developed for the CFHSS CHS T-joints. After successful validation, parametric studies were performed by using the verified FE model. The chord plastification failure of the T-joints was mainly found in both test and numerical studies. The relationship between the joint strengths and the variation of geometric ratios were investigated. The test and numerical strengths of the T-joints were used to assess the strength predictions by design equations provided in CIDECT, EN-1993-1-8 and the literature. It was found that these predictions generally provided unconservative predictions. A new equation that considers the effects of geometric ratios on the strengths was proposed based on both the test and numerical results. By adopting the newly proposed equation, the predictions are improved and provide the least scattered results when compared with other predictions.
AB - This paper presents experimental and numerical investigations of cold-formed high strength steel (CFHSS) circular hollow section (CHS) T-joints. The CFHSS CHS members have nominal 0.2% proof stress of 1100 MPa. The geometric parameters of the T-joints were designed by varying the ratios of β, 2γ and τ. A total of twelve T-joint tests were conducted by applying axial compressive load through the braces without preloading in chords. Non-linear finite element (FE) model was then developed for the CFHSS CHS T-joints. After successful validation, parametric studies were performed by using the verified FE model. The chord plastification failure of the T-joints was mainly found in both test and numerical studies. The relationship between the joint strengths and the variation of geometric ratios were investigated. The test and numerical strengths of the T-joints were used to assess the strength predictions by design equations provided in CIDECT, EN-1993-1-8 and the literature. It was found that these predictions generally provided unconservative predictions. A new equation that considers the effects of geometric ratios on the strengths was proposed based on both the test and numerical results. By adopting the newly proposed equation, the predictions are improved and provide the least scattered results when compared with other predictions.
KW - Chord plastification
KW - Circular hollow section
KW - Cold-formed high strength steel
KW - Experimental investigation
KW - Numerical investigation
KW - Tubular T-joints
UR - http://www.scopus.com/inward/record.url?scp=85118882766&partnerID=8YFLogxK
U2 - 10.1016/j.jcsr.2021.107003
DO - 10.1016/j.jcsr.2021.107003
M3 - Journal article
AN - SCOPUS:85118882766
SN - 0143-974X
VL - 188
JO - Journal of Constructional Steel Research
JF - Journal of Constructional Steel Research
M1 - 107003
ER -