Initial rotational stiffness of tubular joints with axial force in chord
DOI:
https://doi.org/10.23998/rm.64857Avainsanat:
rotational stiffness, hollow section joint, chord stress function, axial forceAbstrakti
In the frame analysis, the local model of the joint must follow the behavior of the joint. When completing the elastic global analysis, the initial rotational stiffness of joints should be known to obtain reliable moment distributions in frames. This paper consists of two parts. The first one evaluates the existing calculation approach for the initial rotational stiffness of welded rectangular hollow section T joints. The validation with the experimental data shows that the current approach significantly underestimates the initial rotational stiffness. An improvement for determining the initial stiffness of T joints is proposed. The second part deals with the influence of the axial force in the main member on the rotational stiffness of the joint. The conducted numerical study shows the extreme reduction of the initial stiffness, when the main member is loaded by axial loads. To consider this effect in the frame analysis, the paper proposes a chord stress function for the initial rotational stiffness for square hollow section T joints, using the curve fitting technique.
Lähdeviitteet
structures, Part 1–8: Design of joints (EN 1993-1-8:2005). Brussels, 2005.
[2] M. Garifullin, M. Bronzova, T. Jokinen, M. Heinisuo and B. Kovačič. Effect of
Fillet Welds on Initial Rotational Stiffness of Welded Tubular Joints. Procedia
Engineering, 165:1643–1650, 2016. https://doi.org/10.1016/j.proeng.2016.11.905.
[3] D. Grotmann and G. Sedlacek. Rotational stiffness of welded RHS beam-to-column
joints. Cidect 5BB-8/98. RWTH-Aachen, Aachen, 1998.
[4] L. Lu. The static strength of I-beam to rectangular hollow section column
connections. Doctoral Dissertation. Delft University Press, Delft, 1997.
[5] J.A. Packer. Moment connections between rectangular hollow sections. Journal of
Constructional Steel Research, 1–2(25):63–81, 1993.
https://doi.org/10.1016/0143-974X(93)90052-T.
[6] J. Szlendak. Beam-column welded RHS connections. Thin-Walled Structures,
1(12):63–80, 1991. https://doi.org/10.1016/0263-8231(91)90027-G.
[7] M. Tabuchi, H. Kanatani and T. Kamba. The local strength of welded RHS T joints
subjected to bending moment. CIDECT report 5AF-84/5E, 1984.
[8] J. Wardenier. Hollow Section Joints. Delft University of Technology, Delft, 1982.
[9] K. Weynand, J.-P. Jaspart, J.-F. Demonceau and L. Zhang. Component method for
tubular joints. CIDECT Report 16F – 3/15, 2015.
[10] Y. Yu. The static strength of uniplanar and multiplanar connections in
rectangular hollow sections. Doctoral Dissertation. Delft University of
Technology, Delft, 1997.
[11] X.L. Zhao. Deformation limit and ultimate strength of welded T-joints in coldformed
RHS sections. Journal of Constructional Steel Research, 2(53):149–165,
2000. https://doi.org/10.1016/S0143-974X(99)00063-2.
Tiedostolataukset
Julkaistu
Numero
Osasto
Lisenssi
Copyright (c) 2017 Marsel Garifullin, Sami Pajunen, Kristo Mela, Markku Heinisuo
Tämä työ on lisensoitu Creative Commons Nimeä-JaaSamoin 4.0 Kansainvälinen Julkinen-lisenssillä.
