Collapse during Construction of a Precast Girder Bridge |
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Authors: | Robert Tremblay Denis Mitchell |
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Affiliation: | 1Professor, Dept. of Civil, Mining and Geological Engineering, école Polytechnique, Montréal ON, Canada. 2Professor, Dept. of Civil Engineering and Applied Mechanics, McGill Univ., Montréal ON, Canada.
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Abstract: | This paper describes the collapse during construction of a precast concrete girder bridge crossing Highway 15, north of Montréal. The bearing conditions for the girders at the time of collapse are discussed. The tie rods that were used to restrain the movement of the girder top flanges were tested to determine their effective stiffness and strength. Rotational and sliding tests were also performed on the pot bearing units. These experimental results were used in an analytical study to confirm the sequence of collapse of the girders. Bracing requirements during construction for precast girder bridges supported on pot bearings are discussed. |
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Keywords: | Bearing capacity Bridges girder Rotation Stability Stiffness Collapse Canada |
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