Structural Engineering and Mechanics

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Nonlinear finite element analysis of top- and seat-angle with double web-angle connections

  • Kishi, N. (Department of Civil Engineering, Muroran Institute of Technology) ;
  • Ahmed, A. (Department of Civil Engineering, Muroran Institute of Technology) ;
  • Yabuki, N. (Department of Civil Engineering, Muroran Institute of Technology) ;
  • Chen, W.F. (College of Engineering, University of Hawaii)
  • Published : 2001.08.25
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Abstract

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.

Keywords

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