1975•National Cooperative Highway Research Program reportRequires access
DESIGN OF BENT CAPS FOR CONCRETE BOX-BIRDER BRIDGES
James E. Carpenter, J. Hanson, Anthony E. Fiorato, Hugh Russell, Donald F. Meinheit, I. Rosenthal, W. Gene Corley, Eivind Hognestad
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Abstract
This article presents design recommendations for integral bent caps in straight, continuous box-girder bridges as the result of a combined experimental and analytical investigation, Project 12-10 in the National Cooperative Highway Research Program. With two models of complete bridges and five models of bent cap portions of bridges, the project team investigated distribution of loads on bent caps, effect of flaring the column in the plane of the bent, effective flange width of the bent cap, effect of spreading the main tensile reinforcement into the adjacent superstructure, and location of the critical design sections. An elastic folded-plate solution and a finite element model were used to predict behavior.