Shear Behavior of Reinforced Concrete Box Culverts

Shear Behavior of Reinforced Concrete Box Culverts

In SI and Customary Units

LAP Lambert Academic Publishing ( 2010-05-17 )

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This study evaluates the shear behavior and capacity of the precast concrete box culverts subjected to HS 20 truck wheel load. The most critical culvert behavior was considered by studying culverts subjected to zero depth of the fill and placed on a rigid bedding material. Full-scale experimental tests, with wheel load placed at the most critical shear location, were conducted on 24 typical precast concrete box culverts designated as per ASTM C 1433- 05. The test results further indicated that flexure governed the behavior up to and beyond AASHTO 2005 factored load.Three-dimensional nonlinear finite element models (FEM) of the test specimens were developed and verified with the experimental results. The shear distribution width for each box was calculated. This was used to obtain the critical factored shear force for all the boxes which were then compared with the American Concrete Institute shear capacity equations. It was shown that the shear capacity exceeded the facored critical shear force for all the ASTM C1433-05 boxes. This study shows that the AASHTO 2005 provision with regard to the shear transfer device across the joint is unsupported.

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By (author) :

Anil Garg

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