Title page for ETD etd-07102009-040624
|Type of Document
||Kavi, Sandeep A.
||Nonlinear 3-D beam/connector finite element with warping for a glulam dome
||Master of Science
|Holzer, Siegfried M.
|Dolan, James Daniel
|Garst, Donald A.
|Loferski, Joseph R.
|Date of Defense
The main objectives of the present study are to incorporate Saint-Venant's torsion solution
in the analysis of a glulam dome with ABAQUS to include warping of rectangular beams,
and to model the nonlinear beam/decking connectors (nails) of the dome in order to
develop an effective finite element model of the glulam dome for investigating its ultimate
load capacity. The shear modulus is modified to include warping of the beams. The
nonlinear connector is defined through a user-coded FORTRAN subroutine UEL. Results
from the thorough testing of these two capabilities are presented.
A convergence study of the solution in the nonlinear analysis of the dome cap with
ABAQUS is performed. The effect of variation in parameters such as the nonlinear
material law and the stiffness of hinge-connector elements on the dome cap model is
examined. A dome cap model with 16 nailed joints for each beam is analyzed. Dome
models with nailed joints at truss bracing points (i.e., the end nodes of the truss bracing
elements) and with 16 nailed joints for every beam are analyzed. The results of these
models are compared with the models with and without truss bracing. Finally, conclusions
based on this study and recommendations for future research are presented.
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