Please use this identifier to cite or link to this item:
|Title:||Finite-Element Modeling of Heat-Curved I-Girders||Authors:||Sen, Rajan
|Affiliations:||Department of Civil and Environmental Engineering||Issue Date:||2003||Part of:||ASCE journal of bridge engineering||Volume:||8||Issue:||3||Start page:||153||End page:||161||Abstract:||
Heat curving is extensively used for fabricating structural steel girders for bridges. Current American Association of State Highway and Transportation Officials (AASHTO) specifications limit usage to Grade 345 steel (Fy=50ksi),(Fy=50ksi), ruling out Grade 485 (Fy=70ksi)(Fy=70ksi) high performance steel (HPS). This paper presents results of a three-dimensional finite-element analysis to assess the applicability of existing AASHTO provisions for HPS 485W sections. The finite-element package NASTRAN was used to conduct the analysis and the model calibrated against experimental data obtained from full-scale tests conducted previously by U.S. Steel Corporation. Comparisons include curvatures, lateral deformations, and residual stresses. The calibrated model was used to predict the performance of an identical HPS girder subjected to the same heat/cool cycles. The three-dimensional analysis predicted smaller curvatures as compared with Grade 250 (Fy=36ksi)(Fy=36ksi) or Grade 345 (Fy=50ksi)(Fy=50ksi) steel. Comparable curvatures could be obtained by using higher temperatures.
This paper was presented in " Tenth International Conference on Civil, Structural and Environmental Engineering Computing, August 30 – September 2, 2005, Rome, Italy ".
|Appears in Collections:||Department of Civil and Environmental Engineering|
Show full item record
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.