Tests of precast continuous spliced girders

Abstract

The rigidity and strength of two precast girders with welded splices of two different designs were determined in tests of the girders as beams continuous over three supports. The girders consisted of three reinforced concrete box sections welded and grouted together to form a beam 1-by 2-ft in cross section and 2 $ ft long.The splices located at points of inflection were formed by lap welding suitable lengths and amounts of positive and negative reinforcement projecting from the ends of adjoining sections and then grouting the pockets . The designs of the splices of the two girders were identical, except that girder No. 2 contained an additional amount of reinforcement consisting of three inclined stirrups of No, I 4 . bars on each side of the splice. The addition of the inclined stirrups resulted in an Increase of 6? percent in load carrying capacity of girder No. 2 as compared with girder No. 1, 1.