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A platform for research: civil engineering, architecture and urbanism
Laboratory test on mechanically built-up timber girder for bridge construction
Abstract This paper is a continuation of a previous paper which identified an appropriate mechanically built-up timber girder that could be utilized for bridge construction in countries abundant in timber. In that paper, an existing theory by Ghaboussi was examined and it was detected that the displacement configuration used for shear across the beam depth was in error; thus, while the formula developed for the effective moment of inertia by Ghaboussi was accepted, a new formula had to be derived for the effective area of shear. In this paper laboratory tests are conducted on a test model similar to the girder envisaged, made out of timber in a bid to check the accuracy of the formulae derived in the previous paper. The test results show that the Ghaboussi formula for the moment of inertia gives a good prediction of the true moment of inertia of the girder. However, the Ghaboussi formula for the effective shear area gives a very poor prediction of the true shear area, as is expected. The new formula derived in the previous paper gives a closer prediction, even though there is a need to further close the gap between the experimental results and those of the new theory.
Laboratory test on mechanically built-up timber girder for bridge construction
Abstract This paper is a continuation of a previous paper which identified an appropriate mechanically built-up timber girder that could be utilized for bridge construction in countries abundant in timber. In that paper, an existing theory by Ghaboussi was examined and it was detected that the displacement configuration used for shear across the beam depth was in error; thus, while the formula developed for the effective moment of inertia by Ghaboussi was accepted, a new formula had to be derived for the effective area of shear. In this paper laboratory tests are conducted on a test model similar to the girder envisaged, made out of timber in a bid to check the accuracy of the formulae derived in the previous paper. The test results show that the Ghaboussi formula for the moment of inertia gives a good prediction of the true moment of inertia of the girder. However, the Ghaboussi formula for the effective shear area gives a very poor prediction of the true shear area, as is expected. The new formula derived in the previous paper gives a closer prediction, even though there is a need to further close the gap between the experimental results and those of the new theory.
Laboratory test on mechanically built-up timber girder for bridge construction
Allotey, I. A. (author)
1990
Article (Journal)
English
Laboratory test on mechanically built-up timber girder for bridge construction
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