Strengthening Historic Covered Bridges To Carry Modern Traffic

Petro, Samer; Gangarao, Hota; Kemp, E.; Cyphers, Rex; Teagarden, Jeffrey; West Virginia University, Morgantown, Constructed Facilities Center; West Virginia University. College of Engineering and Mineral Resources; West Virginia University. Institute for History of Technology & Industrial Archaeology; West Virginia University. Eberly College

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Strengthening Historic Covered Bridges To Carry Modern Traffic

2007-05-01
By Petro, Samer ; Gangarao, Hota ; Kemp, E. ; ...

[PDF-4.75 MB]

English

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Creators:

Petro, Samer ; Gangarao, Hota ; Kemp, E. ; Cyphers, Rex ; Teagarden, Jeffrey

Petro, Samer ; Gangarao, Hota ; Kemp, E. ; Cyphers, Rex ; Teagarden, Jeffrey Less -
Corporate Creators:

West Virginia University, Morgantown, Constructed Facilities Center ; West Virginia University. College of Engineering and Mineral Resources ; West Virginia University. Institute for History of Technology & Industrial Archaeology ; West Virginia University. Eberly College

West Virginia University, Morgantown, Constructed Facilities Center ; West Virginia University. College of Engineering and Mineral Resources ; West Virginia University. Institute for History of Technology & Industrial Archaeology ; West Virginia University. Eberly College Less -
Contributors:

Duwadi, Sheila Rimal ; O'Fallon, John

Duwadi, Sheila Rimal ; O'Fallon, John Less -
Corporate Contributors:

United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development ; United States. Federal Highway Administration. Office of Bridge Technology ; Turner-Fairbank Highway Research Center

United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development ; United States. Federal Highway Administration. Office of Bridge Technology ; Turner-Fairbank Highway Research Center Less -
Subject/TRT Terms:

[+]

Covered Bridges Glass Fiber Reinforced Plastics Historic Bridges Historic Preservation
Resource Type:

Tech Report
Geographical Coverage:

United States
Edition:

Final Report
Contracting Officer:

Duwadi, Sheila R.; O'Fallon, John
Corporate Publisher:

United States. Department of Transportation. Federal Highway Administration. Office of Infrastructure Research and Development
Abstract:

In this research project, the Constructed Facilities Center (CFC) and the Institute for the History of Technology and Industrial Archaeology (IHTIA) of West Virginia University (WVU) teamed up to develop means and methods to strengthen wooden superstructure components of historic covered bridges, using glass-fiber reinforced polymer (GFRP) composite materials. The strengthening methodologies developed in this project were designed to conform to the Secretary of the Interior’s Standard for Historic Preservation. Specifically, tension and bending tests were conducted to establish the bond strength of GFRP rebars embedded in wood, and to establish the bending strength and stiffness of large-scale floor beams reinforced with GFRP pultruded plates and with GFRP rebars. In addition, methods were developed to enhance the shear capacity of large-scale floor beams reinforced with GFRP pultruded plates bonded on edge in narrow, prerouted vertical slots. The GFRP rebars were developed to be used specifically as axial reinforcement for truss members, while the GFRP were developed to increase the bending and shear capacity of floor beams. The test results showed bonded-in GFRP rebars performed very well in terms of pullout force and bond strength, and the strength and stiffness of GFRP-reinforced floor beams improved significantly. Although the shear strength was also expected to improve considerably with the addition of the GFRP plates placed on edge (resulting in a flitched beam), the shear capacity decreased slightly. The flitched beams tested were severely checked, which degraded their shear strength as compared to the solid control specimen. Further testing will continue in a succeeding study. Additionally, during this research, several methods of concealing the reinforcement were investigated. One successful method took advantage of routing a member on the bottom face and bonding a GFRP plate with an integrated veil to match the wood grain and color of the original aged wood.
Format:

PDF
Funding:

DTFH61-00-C-00081
Collection(s):

Federal Highway Administration
Main Document Checksum:

[+]

urn:sha256:7bfa0ab59e4d9643d3b38117807c8d6d92935c016770c1d7852339ff1f98c193
Download URL:

https://rosap.ntl.bts.gov/view/dot/66655/dot_66655_DS1.pdf
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Strengthening Historic Covered Bridges To Carry Modern Traffic

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