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Development of Wood Bridges: Scale Model Tests of a Wooden Arch Bridge.

PB95149696

Publication Date	1994
Personal Author	Rautakorpi, H.; Jutila, A.; Maekipuro, R.; Haakana, P.; Salokangas, L.
Page Count	28
Abstract	The report is concentrating on a scale model of a wooden arch bridge. The span of the model, which is thought to represent a real bridge in scale one to ten, is 4.2 meters. Externally the model is supported as a simple beam, which means that no external redundant force for the arch is provided. The report includes overall sketches as well as detail drawings of the most important parts of the model. The loading cases considered are the dead load, the wind load on the arches, point loads on the bridge deck and a distributed load on one half of the span. In the last case mentioned the load was gradually increased almost until the rupture load. The loading arrangements are introduced by drawings and photographs. During loading deflections and horizontal displacements were measured at several points around the model. The most important test results are presented graphically. According to the tests the horizontal rigidity of the model seems to be less than assumed by the theory used. The reason is found by the loosened joints of the bracing members. On the other hand, the deck plate makes the model quite rigid for vertical loads.
Keywords	Model tests Scale models Design analysis Bridge design Structural analysis Joints(Junctions) Displacement Deflection Dimensions Beams(Structural) Test facilities Structural design Foreign technology Wooden arch bridges
Source Agency	Helsinki University of Technology
NTIS Subject Category	50A - Highway Engineering
Corporate Authors	Helsinki Univ. of Technology, Espoo (Finland). Lab. of Bridge Technology.
Supplemental Notes	Also pub. as Helsinki Univ. of Technology, Espoo (Finland). Lab. of Bridge Technology rept. no. PUB-10. See also PB95-149688 and PB95-149704.
Document Type	Technical Report
Title Note	Research rept.
NTIS Issue Number	199507

Development of Wood Bridges: Scale Model Tests of a Wooden Arch Bridge.

Development of Wood Bridges: Scale Model Tests of a Wooden Arch Bridge.
PB95149696

Publication Date	1994
Personal Author	Rautakorpi, H.; Jutila, A.; Maekipuro, R.; Haakana, P.; Salokangas, L.
Page Count	28
Abstract	The report is concentrating on a scale model of a wooden arch bridge. The span of the model, which is thought to represent a real bridge in scale one to ten, is 4.2 meters. Externally the model is supported as a simple beam, which means that no external redundant force for the arch is provided. The report includes overall sketches as well as detail drawings of the most important parts of the model. The loading cases considered are the dead load, the wind load on the arches, point loads on the bridge deck and a distributed load on one half of the span. In the last case mentioned the load was gradually increased almost until the rupture load. The loading arrangements are introduced by drawings and photographs. During loading deflections and horizontal displacements were measured at several points around the model. The most important test results are presented graphically. According to the tests the horizontal rigidity of the model seems to be less than assumed by the theory used. The reason is found by the loosened joints of the bracing members. On the other hand, the deck plate makes the model quite rigid for vertical loads.
Keywords	Model tests Scale models Design analysis Bridge design Structural analysis Joints(Junctions) Displacement Deflection Dimensions Beams(Structural) Test facilities Structural design Foreign technology Wooden arch bridges
Source Agency	Helsinki University of Technology
NTIS Subject Category	50A - Highway Engineering
Corporate Authors	Helsinki Univ. of Technology, Espoo (Finland). Lab. of Bridge Technology.
Supplemental Notes	Also pub. as Helsinki Univ. of Technology, Espoo (Finland). Lab. of Bridge Technology rept. no. PUB-10. See also PB95-149688 and PB95-149704.
Document Type	Technical Report
Title Note	Research rept.
NTIS Issue Number	199507