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Effective Distribution Width of Tension Joints in Brace of Rectangular Concrete-filled Steel Tube Stiffened with PBL(PDF)

《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

Issue:
2017年06期
Page:
116-126
Research Field:
Publishing date:

Info

Title:
Effective Distribution Width of Tension Joints in Brace of Rectangular Concrete-filled Steel Tube Stiffened with PBL
Author(s):
HOU Bei-bei LIU Yong-jian JIANG Lei ZHANG Guo-jing
School of Highway, Chang’an University
Keywords:
joint of rectangular concrete-filled steel tube stiffened with PBL effective distribution width stress distribution whole stressing process bearing capacity of joint
PACS:
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DOI:
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Abstract:
In order to research the stress distribution and the effective distribution width of tension joints in the brace of rectangular concrete-filled steel tube stiffened with PBL, 42 finite element models of joints of rectangular hollow tube, concrete-filled steel tube and PBL stiffened concretefilled steel tube were established by ABAQUS software, and the displacement loading was carried out. According to the results of finite element calculation, the expressions of effective distribution width of rectangular hollow tube, concretefilled steel tube and PBL stiffened concretefilled steel tubular joints were obtained. The results show that the stress distribution inhomogeneity of PBL stiffened concrete-filled steel tubular joint is lower than that of hollow tube and concretefilled tubular joints during the whole stressing process of joint. When the load displacement reaches 3%b0 (b0 is width of chord), the effective distribution width of PBL stiffened joint is greater and it has better mechanical performance, and the stress distribution efficiency ξ?of branch plate decreases with the increase of the width to thickness ratio 2γ?of chord and the thickness ratio τ of brace to chord, and the effect of τ on ξ?is more significant. The stress distribution efficiency ξ?of support plate varies little with the width ratio β of brace to chord, and it shows quadratic parabola regularity. The calculated values of the fitted formula are in good agreement with the calculated values of CIDECT code and finite element method, and the correctness of the formula is verified.

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Last Update: 2017-11-30