Light Truck Frame Joint Stiffness Study Phase 1 Final Report

APPENDIX A: ABSTRACTS
reasonable agreement with the majority of truss tests. Calculated moment-axial force interaction
curves tend to predict trends of behavior rather than to be accurate.
24. Theoretical Analysis of Haunched-Reinforced T-Joints in Square Hollow Sections
Korol, R.M. and Mansour, M.H.
Canadian Journal of Civil Engineering; Dec. 1979
A theoretical analysis has been undertaken for unequal width T-joints, haunch-reinforced, in square
hollow structural sections (HSS). The unreinforced joint is merely a special case. The theory was
based on a finite difference solution to the elastic chord flange plate equation and predicts the
branch-to-chord joint stiffnesses under both bending and axial force. The effects of varying the width
ratio overall haunch length-to-width ratio, and chord width-to-thickness ratio b c were studied for
different plate edge boundary conditions. The latter parameter has the greatest effect on stiffness, but
the other two, including haunch size, are also significant. There is reasonable agreement between the
joint rotational stiffness factor.
25. Unequal Width Connections of Square Hollow Sections in Vierendeel Trusses
Korol, R.M.; Zanaty, M.E.; and Brady, F.J.
Canadian Journal of Civil Engineering, June 1977
With the advent of hollow structural steel sections, the potential for Vierendeel trusses has greatly
increased. The absence of simplified design methods has led to an extensive research program, the
results of which are reported here. A total of 29 specimen comprising five distinct connection types
were tested and their strength and stiffness properties were recorded. Most of the joints tested
behaved in a semi-rigid fashion, so that a stiffness method for analyzing Vierendeel trusses has been
developed. Design curves for prediction of joint strength are proposed and design examples of
trusses under panel point loading are analyzed. Two types of joint are recommended: the haunch
type of connection and the cord flange stiffener, both of which have adequate strength and stiffness
characteristics.
26. On the Definition of Beam-Wall Joint Rotations in the Analysis of Coupled Wall-Frame
Structures
Kwan, A.K.H.
Engineering Structures, 1993
In the analysis of coupled wall-frame structures, several different definitions for the beam-wall joint
rotations have been adopted. However, the various definitions used are not equivalent. By
formulating the coupling beam element as a Timoshenko beam element with both horizontal and
vertical fiber rotations at each end, it is shown that the proper definition for nodal rotation at a beamwall
joint should be the rotation of the vertical fiber at the beam-wall interface; the use of other
definitions may lead to errors in the effective stiffness of the coupling beams. A quantitative
assessment of the errors so caused is made and it is found that in cases where coupling beams are
short and stiff, the errors could be quite significant. It is therefore proposed that existing methods
which use definitions other than the vertical fiber rotations at the joints should be reviewed and, if
necessary, reformulated to have the definition of the beam - wall joint rotations amended.
Report: A/SP-005-1 Light Truck Frame Joint Study 76