eprintid: 9651
rev_number: 4
userid: 6
dir: disk0/00/00/96/51
datestamp: 2011-11-10 20:04:44
lastmod: 2016-11-15 13:51:30
status_changed: 2011-11-10 20:04:44
type: thesis_degree
metadata_visibility: show
contact_email: bsmst27@pitt.edu
item_issues_count: 0
eprint_status: archive
creators_name: Miller, Bryan Scott
creators_email: bsmst27@pitt.edu
creators_id: BSMST27
title: BEHAVIOR OF WEB-TAPERED BUILT-UP I-SHAPED BEAMS
ispublished: unpub
divisions: sch_eng_civilenvironmental
full_text_status: public
keywords: Load and Resistance Factor Design; Metal Building Manufacturers Association
abstract: Appendix F of the AISC-LRFD Specification governs the design of web-tapered I-shaped beams. These design provisions are restricted to beams with equal flange areas and non-slender webs. However, the current practice in the low-rise metal building industry is to employ flanges of unequal area and slender webs; a time honored practice that has resulted in safe and economical structures. The current study utilizes validated nonlinear finite element analysis techniques to predict the flexural response and corresponding limit states associated with mild-carbon steel doubly-symmetric web-tapered I-shaped beams. A parametric study is performed to study the moment capacity and flexural ductility in the inelastic range of various beam geometries with length-to-depth ratios between two and three (i.e. what one normally encounters in the rafter sections of a low-rise metal building gable frame). Compactness criteria that ensure attainment of a rotation capacity equal to three are examined and results tabulated. A comparison is made between the Specification design provisions and the ultimate moment capacity and structural ductility predicted by the finite element method. Conclusions are made regarding the effects of plate slenderness on the behavior of the nonprismatic beam models. Recommendations are made for further research of singly-symmetric web-tapered beams.
date: 2004-02-02
date_type: completed
institution: University of Pittsburgh
refereed: TRUE
etdcommittee_type: committee_chair
etdcommittee_type: committee_member
etdcommittee_type: committee_member
etdcommittee_name: Earls, Christopher J
etdcommittee_name: Lin, Jeen-Shang
etdcommittee_name: Torkamani, Morteza A.M
etdcommittee_email: earls@engrng.pitt.edu
etdcommittee_email: jslin@engrng.pitt.edu
etdcommittee_email: torkmani@cis.pitt.edu
etd_defense_date: 2003-12-02
etd_approval_date: 2004-02-02
etd_submission_date: 2003-11-13
etd_access_restriction: immediate
etd_patent_pending: FALSE
assigned_doi: doi:10.5195/pitt.etd.2011.9651
thesis_type: thesis
degree: MSCE
committee: Christopher J. Earls (earls@engrng.pitt.edu) - Committee Chair
committee: Jeen-Shang Lin (jslin@engrng.pitt.edu) - Committee Member
committee: Morteza A.M. Torkamani (torkmani@cis.pitt.edu) - Committee Member
etdurn: etd-11132003-135449
other_id: http://etd.library.pitt.edu/ETD/available/etd-11132003-135449/
other_id: etd-11132003-135449
citation:   Miller, Bryan Scott  (2004) BEHAVIOR OF WEB-TAPERED BUILT-UP I-SHAPED BEAMS.  Master's Thesis, University of Pittsburgh.    (Unpublished)  
document_url: http://d-scholarship-dev.library.pitt.edu/9651/1/Miller_Thesis.pdf