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CLC number: TU392

On-line Access: 2011-02-08

Received: 2010-01-17

Revision Accepted: 2010-07-09

Crosschecked: 2011-01-07

Cited: 4

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Citations:  Bibtex RefMan EndNote GB/T7714

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Journal of Zhejiang University SCIENCE A 2011 Vol.12 No.2 P.121-130


Parametric formulae for axial stiffness of CHS X-joints subjected to brace axial tension

Author(s):  Guo-zhi Qiu, Jing-hai Gong, Jin-cheng Zhao

Affiliation(s):  Department of Civil Engineering, Shanghai Jiao Tong University, Shanghai 200240, China

Corresponding email(s):   qiugz@sjtu.edu.cn

Key Words:  Joint stiffness, Brace tension, Parametric analysis, Stiffness formula

Guo-zhi Qiu, Jing-hai Gong, Jin-cheng Zhao. Parametric formulae for axial stiffness of CHS X-joints subjected to brace axial tension[J]. Journal of Zhejiang University Science A, 2011, 12(2): 121-130.

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%A Jin-cheng Zhao
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T1 - Parametric formulae for axial stiffness of CHS X-joints subjected to brace axial tension
A1 - Guo-zhi Qiu
A1 - Jing-hai Gong
A1 - Jin-cheng Zhao
J0 - Journal of Zhejiang University Science A
VL - 12
IS - 2
SP - 121
EP - 130
%@ 1673-565X
Y1 - 2011
PB - Zhejiang University Press & Springer
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DOI - 10.1631/jzus.A1000022

Recent research has shown that circular hollow section (CHS) joints may exhibit non-rigid behavior under axial load or bending. The non-rigid behavior significantly affects the mechanical performance of structures. This paper is concerned with the parametric formulae for predicting axial stiffness of CHS X-joints while braces are in tension. The factors influencing the axial stiffness of CHS X-joints under brace axial tension are investigated, including the joint geometric parameters, the axial force of the chord, and bending moments of braces in two directions, etc. Effects of various parameters on axial stiffness of CHS X-joints are examined by systematic single-parameter nonlinear analysis using shell finite element methods. The analysis is implemented in a finite element code, ANSYS. The observed trends form the basis of the formulae for calculating the joint axial stiffness under brace axial tension by multivariate regression technique. In order to simplify the formulae, two non-dimensional variables are introduced. The proposed formulae can be used to calculate the joint axial stiffness in the design of single-layer steel tubular structures.

Darkslateblue:Affiliate; Royal Blue:Author; Turquoise:Article


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