Techno Press
Techno Press

Structural Engineering and Mechanics   Volume 12, Number 2, August 2001, pages 201-214
Nonlinear finite element analysis of top-and seat-angle with double web-angle connections
N. Kishi, A. Ahmed, N. Yabuki(Japan) and W.F. Chen(U.S.A.)

Abstract     [Full Text]
    Four finite element (FE) models are examined to find the one that best estimates moment-rotation
characteristics of top- and seat-angle with double web-angle connections. To efficiently simulate
the real behavior of connections, finite element analyses are performed with following considerations: 1) all
components of connection (beam, column, angles and bolts) are discretized by eight-node solid elements;
2) shapes of bolt shank, head, and nut are precisely taken into account in modeling; and 3) contact
surface algorithm is applied as boundary condition. To improve accuracy in predicting moment-rotation
behavior of a connection, bolt pretension is introduced before the corresponding connection moment being
surcharged. The experimental results are used to investigate the applicability of FE method and to check
the performance of three-parameter power model by making comparison among their moment-rotation
behaviors and by assessment of deformation and stress distribution patterns at the final stage of loading.
This research exposes two important features: (1) the FE method has tremendous potential for connection
modeling for both monotonic and cyclic loading; and (2) the power model is able to predict moment-rotation
characteristics of semi-rigid connections with acceptable accuracy.
Key Words
    semi-rigid connection; moment-rotation behavior; connection stiffness and strength; monotonic loading; finite element method.
N. Kishi, A. Ahmed and N. Yabuki, Department of Civil Engineering, Muroran Institute of Technology, Muroran 050-8585, Japan
W.F. Chen, College of Engineering, University of Hawaii, Manoa, Honolulu, HI 96822, U.S.A.

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