Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Strengthening Historic Covered Bridges to Carry Modern Traffic
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 Interiors 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.
Strengthening Historic Covered Bridges to Carry Modern Traffic
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 Interiors 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.
Strengthening Historic Covered Bridges to Carry Modern Traffic
S. Petro (Autor:in) / H. GangaRao (Autor:in) / E. Kemp (Autor:in) / R. Cyphers (Autor:in) / J. Teagarden (Autor:in)
2007
119 pages
Report
Keine Angabe
Englisch
Highway Engineering , Construction Equipment, Materials, & Supplies , Bridges(Structures) , Glass-fiber reiforced polymer , Composite materials , Construction materials , Bridge design , Wood preservatives , Structural analysis , Historic preservation , Flitched beams , Horizontal shears , Plates , Rebars , Strengthening , Research project , Covered bridges
Strengthening historic covered bridges to carry modern traffic
| TIBKAT | 2010
| Engineering Index Backfile | 1939
HISTORIC AMERICAN COVERED BRIDGES
| Taylor & Francis Verlag | 1998
Historic American Covered Bridges
| British Library Online Contents | 1998
Historic American Covered Bridges
| Online Contents | 1998