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中南大学学报(英文版)

Journal of Central South University

Vol. 22    No. 6    June 2015

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Axial compression physical testing of traditional and bird beak SHS T-joints
CHEN Yu(陈誉)1, 2, WANG Jiang(王江)2

1. School of Urban Construction, Yangtze University, Jingzhou 434023, China;
2. College of Civil Engineering, Huaqiao University, Xiamen 361021, China

Abstract:The static tests of nine traditional and bird beak square hollow structure (SHS) T-joints with different β values and connection types under axial compression at brace end were carried out. Experimental test schemes, failure modes of specimens, jack load-vertical displacement curves, jack load-deformation of chord and strain intensity distribution curves of joints were presented. The effects of β and connection types on axial compression property of joints were studied. The results show that the ultimate axial compression capacity of common bird beak SHS T-joints and diamond bird beak SHS T-joints is larger than that of traditional SHS T-joint specimens with big values of β. The ultimate axial compression capacity of diamond bird beak SHS T-joints is larger than that of common bird beak SHS T-joints. As β increases, the increase of the ultimate axial compression capacity of diamond bird beak SHS T-joints over that of common bird beak joints grows. The ultimate axial compression capacity and the initial axial stiffness of all kinds of joints increase as β increases, and the initial axial stiffness of the diamond bird beak SHS T-joints is the largest. The ductilities of common bird beak and diamond bird beak SHS T-joints increase as β increases, but the ductility of the traditional SHS T-joints decreases as β increases.

 

Key words: bird beak SHS T-joints; axial compression property; physical testing; ultimate axial compression capacity; initial axial compression stiffness; strain intensity distribution; ductility

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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