Numerical Study on Flexural Behavior of Bolted Ball-cylinder Joint

Guo Xiaonong, Zeng Qiang, Huang Zewei, Peng Li, Chen Yu

Abstract

In order to investigate flexural behaviors of the bolted ball-cylinder(BBC) joint,based on 2 tests on joints under one-way bending moment,finite element (FE) model was developed in ABAQUS. Failure modes,bolt internal forces as well as the load-displacement curves of the joints were obtained. By comparison,it was found that the numerical results agreed well with the experimental results,verifying the reliability of the FE model. Subsequently,joint model under bending moment was simplified and the mechanical behaviors of joint under positive and negative moments were discussed. In the parametric study,46 FE models were established to investigate the effects of different parameters on flexural behaviors of the BBC joint. The results indicate that increasing the diameter and thickness of the hollow cylinder can improve the flexural behavior of the BBC joint significantly; while the bearing capacity and stiffness of the BBC joint increase with the increase of rectangular tube width,washer thickness,size and interval of the bolts,and the effects will be more obvious when positive moment is applied to the joint. Besides,the ribbed stiffness can improve flexural behavior of the BBC joint greatly.

 

Keywords:   bolted ball-cylinder joint,  semi-rigid joint,  finite element analysis,  parametric analysis,  bending stiffness



Full Text:

PDF


References


JGJ7—2010 Technical specification for space frame structures [S], Beijing: China Architecture & Building Press,2010: 16—17. (In Chinese )

WANG X,D0NG S L,WAN H Y. Analysis of influence of welding spherical joint stiffness on internal force and deflection of grid [j]. Spatial Structures, 1996,2(4):34—40. (in Chinese)

WAN H Y. Finite element analysis of axial flexibility and flexural stiffness of welded hollow spherical joints of space trusses structure [j]. Journal of Anhui Institute of Architecture (Natural Science), 1998,6(4):33—36. (in Chinese)

WANG X,D0NG S L, WAN H Y. Finite element analysis of welded spherical joints ’ stiffness [j]. Journal of Zhejiang University (Engineering Science ), 2000,34 ( 1) : 77—82. (In Chinese )

LOPEZ A,PUENTE I,SERNA M A. Numerical model and experimental tests on single—layer latticed domes with semi-rigid joints [ j]. Computers & Structures,2007,85(7) :360—374.

LOPEZ A,PUENTE I,AIZPURUA H. Experimental and analytical studies on the rotational stiffness of joints for single—layer structures [ j]. Engineering Structures ,2011,33(3):731—737.

ZHANG J L,ZHA0 J C. The influence of joint stiffness exerted on the stability of Kiewitte — type single—layer reticulated shells [j]. Spatial Structures,2004,10(2):43—45. (in Chinese)

KANG J, SONG Z S. The influence of joint stiffness on the stability of geodesic single—layer reticulated shells with initial imperfection [ J ]. Sichuan Building Science,2008,34(1) :42—46. (in Chinese)

PENG L,GU0 X N. Non-purlin gird structure of bolted-ball-cylinder joints: CN203200923U[P]. 2013-04-08. (in Chinese)

GUO X N,HUANG Z W,YANG S F,et cd. Experimental study of static bearing behavior of bolted ball—cylinder joint [ j]. Journal of Tongji University (Natural Science) ,2015 ,43 ( 11): 1626—1633. (in Chinese)

GUO X N,HUANG Z W,PENG L,et al. Study of bearing capacity of bolted ball—cylinder joints under uniaxial compression [ j]. Journal of Building Structures ,2018,39( 12) :98—109. (in Chinese)

BS EN 1993-1-8:2005 CEN Eurocode 3: design of steel structures — Part 1—8: design of joints [ S ]. London: British Standards Institution , 2005:54—56.


Refbacks

  • There are currently no refbacks.