Wood Road Bridge · [email protected] [email protected] Synopsis: The Wood Road...
Transcript of Wood Road Bridge · [email protected] [email protected] Synopsis: The Wood Road...
Mark R. Laistner, P.E. Stephen C. Catherman, P.E. Erdman Anthony & Assoc., Inc. Steuben County DPW 2165 Brighton Henrietta Townline Rd. 3 E. Pulteney Square Rochester, NY 14623 Bath, NY 14810 (585)427-8888 ext. 257 (607) 664-249 [email protected] [email protected] Synopsis:
The Wood Road Bridge is a 207-foot, single-span wrought iron through truss bridge carrying Wood Road over the Cohocton River in the Town of Campbell, New York. Built in 1897, the bridge is an intact, representative example of a pin-connected, wrought iron, Baltimore truss bridge. The Baltimore truss design is a late nineteenth century adaptation of the Pratt truss design that incorporates sub-struts to form middle panel points for longer spans. The bridge also contains Phoenix tube compression members (patented in 1862) that were a significant technological advance in truss bridge construction.
This presentation will detail the design and construction of the rehabilitation of this historic structure.
About the Presenters:
Mark Laistner has a B.S. degree in Civil Engineering from SUNY Buffalo, 1987. He is a licensed Professional Engineer in New York, Pennsylvania and Maine and a certified Bridge Inspector in Pennsylvania. Mark has been a Senior Associate at Erdman, Anthony and Associates, Inc. for seven years. He is the Team Leader and Project Manager for municipal bridge projects. He previously worked for LaBella Associates, P.C. where he was the Project Manager and Lead Structural Engineer for the Wood Road Bridge rehabilitation.
Stephen C. Catherman has been a N.Y.S. Licensed Professional Engineer for 14 years and has worked for Steuben County Dept. of Public Works Engineer for the past 13 years. Previously, he worked in the Structures, Construction, and Planning Departments of NYSDOT's Reg. 6 office for 8 years. He currently manages Steuben County's 331 bridges, including all federally-aided, locally-administered projects such as the Wood Road bridge.
SESSION 3.3
Wood Road Bridge over the Cohocton River Rehabilitation of a Historic Wrought Iron Truss Bridge
In Steuben County
Rehabilitationof the
Historic Wood Road Bridge
presented at the
Eleventh Statewide Conferenceon
Local Bridges
Project Information
• Bridge Owner: Steuben County • Locally Administered Federal Aid Project, Funded
By:– Federal Highway Administration (FHWA)– New York State Dept. of Transportation (NYSDOT)– Steuben County– Town of Campbell
• Designer: Erdman Anthony & Associates, Inc.• Contractor: Vector Construction Corp.
SteubenCampbell
Cohocton River
Canisteo River Chemung Ti
oga
RiverRi
ver
Keuka
Lak
e
Hornell
Corning
Bath
Town of Campbell
Late 1800’s
Red Bridge
Red Bridge Location
In–DepthBridge Inspection
Bridge Deficiencies
• Displaced Truss Expansion Bearings• Corroded Top Lateral Struts• Corroded Stringers• Deteriorated Timber Deck• Deteriorated Paint• Inadequate Bridge Railing• Low Live Load Capacity
Material Samplingand
Testing
Floorbeam Web Coupon5” x 2” x ¼”
Floorbeam Flange Coupon5” x 1 ½” x 5/16”
Phoenix Tube Coupon1” x 3/16 ”
Phoenix Tube Coupon1” x 1/8 ”
U-Bolt Coupon1 5/8” x 1 ¾”
U-Bolt Coupon1 7/16” x 7/8”
Properties of Wrought Iron
- Nearly Pure Iron- Contains Iron Silicate (Slag) Fibers- Fiber Orientation Affects Strength- Fibers Increase Ductility- Fibers Increase Fatigue Resistance- High Resistance to Corrosion
Chemical Analysis
99.67Fe0.05Si
0.013S0.221P< 0.02Mn< 0.01C
%Element
Tensile Specimens
Material Properties
0
10
20
30
40
50
60
Stre
ss (k
si)
Fu Fy
Wrou
ght Ir
on19
99 - Laci
ng Bar
1999
- FB Web
2002
- FB Web
2002
- FB Flange
Design
Valu
es20
04 –
Eye-ba
r20
04 –
Eye-ba
r
Structural Analysis
30 ft
12 PANELS @ 17'-2 ½" = 206’-6”
15 ft
U02
U11
U03 U10U08U07 U09U05U04 U06
U01
L00 L01 L02 L03 L04 L05 L06 L07 L08 L09 L10 L11 L12
M03M05 M07
M09
Phoenix Tube MembersBuilt-up Members
Baltimore TrussU03 U07 U09U05
L00
U02 U10U08U04 U06
L02 L04 L06 L08 L10 L12
U11U01
L01 L03 L05 L07 L09 L11
M03M05 M07
M09
Analysis ResultsU03 U07 U09U05
L00
U02 U10U08U04 U06
L02 L04 L06 L08 L10 L12
U11U01
L01 L03 L05 L07 L09 L11
M03M05 M07
M09
Members Rated Below H20 Loading
Rehabilitation Scope- Replace Deck, Stringers, & Floorbeams- Strengthen 12 Short Diagonals- Replace 12 Floorbeam Hanger Members - Replace 3 Lateral Struts- Cap & Re-point Abutments- Rehabilitate Exp. Bearings- Install New Railing- Paint Truss
Plan & Elevation
Profile
Diagonal Strengthening
New Floorbeam Hanger Members
Floorbeam Hanger at Phoenix Tubes
Construction
12” +/-