Curved Bridge Design, Fabrication and Construction · Curved Girder Specifications Curved Steel...
Transcript of Curved Bridge Design, Fabrication and Construction · Curved Girder Specifications Curved Steel...
Curved Bridge
Design, Fabrication
and Construction
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
OVERVIEW
of
CURVED STEEL
GIRDER BRIDGES
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
Advantages of Curved Steel Girders
1. Longer Spans
2. Continuous Girders
3. Accommodate Complex Geometry
4. Minimize Expansion Jts. & Bearing Devices
5. Simplified Deck Construction
6. More Aesthetic Structure
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
How Complicated are
Horizontally Curved
Girders?
Curved Steel Girder BridgesPD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
Consider thisContractorsSituation !
ConsiderConsider thisthisContractorsContractorsSituationSituation !!
Curved Steel Girder Bridges
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
Construction Sequence Can Be Critical to Successful
Erection
Construction Construction Sequence Can Sequence Can Be Critical to Be Critical to Successful Successful
ErectionErection
Curved Steel Girder BridgesPD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
History
&
Background
Cur
ved
Ste
el G
irder
Brid
ges
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
Key Historical United States Research Effort
Key Historical United States Key Historical United States Research EffortResearch Effort
Curved Steel Girder Bridges
•CURT PROJECT – Consortium of University Research Teams:� Carnegie Mellon University� University of Rhode Island� Syracuse University� University Pennsylvania
•Pennsylvania Department of Transportation / CMU •Lehigh University•FHWA Curved Steel Bridge Research Project
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
Curved Girder SpecificationsCurved Girder Curved Girder SpecificationsSpecifications
Curved Steel Girder Bridges
• 1980’s era Japanese Specifications • 1980 AASHTO Guide Specifications - ‘Small Format’• 1993 AASHTO Guide Specifications - ‘Large Format’• 1999 NCHRP Report 424• 2003 AASHTO Improved Guide Specifications• AASHTO LRFD with 2005 Interim Specifications• AASHTO LRFD 4th Edition
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
Part I –
Early Research
Part I Part I ––
Early ResearchEarly Research
Curved Steel Girder Bridges
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
Part II -
Research
Part II Part II --
ResearchResearch
Curved Steel Girder Bridges
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
FH
WA
Poo
led
Fun
ds -
Cur
ved
Ste
el B
ridge
R
esea
rch
Pro
ject
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
RESEARCH TEAM
• Federal Highway Administration – TFHRC
• HDR Engineering
• Georgia Tech
• Auburn University
• BSDI, Ltd
• Research Council on Curved Steel Bridges
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
RESEARCH OBJECTIVES
• Conduct Fundamental analytical and physical research on the behavior of curved steel I-girder bridges.
• Address constructability issues
• Provide data for eventual development of Load and Resistance Factor Design (LRFD) provisions for curved steel bridges
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
• Task A – Interim Report I, “Synthesis”
• Task B – Research Council on Curved Bridges (RCCB)
• Task C – Construction Issues
• Task D – Nominal Bending and Sheer Strength of Curved I – and Box – Sections
• Task E – Diaphragms, Cross Frames, and Lateral Bracing and Lateral Effects
• Task F – Serviceability Considerations and Impact
• Task G – Level of Analysis
FHWA-CSBRPPD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
Three – Girder Test Frame
• 90 ft. simple span and 200-ft radius along longitudinal centerline
• Transverse girder spacing of 8.75 ft
• 48 – inch web depth
• 50 ksi and 70 ksi yield strengths
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
COMPONENT SPECIMENS
Key Variables:
• Span Length
• Radius
• Unbraced length
• Flange width
• Web slenderness
• Web stiffening
• Symmetrical vs. unsymmetrical
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
– Research –
Bill Wright Presentation
–– Research Research ––
Bill Wright Bill Wright PresentationPresentation
Curved Steel Girder Bridges
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
Load
344
kip
s
Load
354
kip
s
Load
377
kip
s
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
PDF Created with deskPDF PDF Writer - Trial :: http://www.docudesk.com
EXPECTED RESULTS• Advance state-of-art knowledge on
fundamental behavior of curved I girders in bending and shear and stimulate future studies
• Correlate test results with results from refined computer analyses
• Increase general awareness of important construction issues
• Realize significant cost savings as a result of improved design and construction procedures
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com
AA
� Guide Specifications for Horizontally
Curved Highway Bridges 1980 – small size
PD
F C
reated with deskP
DF
PD
F W
riter - Trial :: http://w
ww
.docudesk.com