Study on Model Experiment of Prestressed Concrete Skewed Box Girder with Transversely Segmental Construction

Abstract

The prestressed concrete skewed box girder with transversely segmental construction was brought out on the basis of the need in the engineering, both model experiments and FE analysis of the presented construction and the beam box with integral construction were carried out. With the analysis of the obtained data by mathematical statistics, comparison of table and graph, and the corresponding FE analysis, the difference of mechanical performances of both constructions was analyzed under various experimental loading cases. The results show that (1) the deflection of the presented construction is about 5.3% larger than that of the beam box with integral construction, the longitudinal strain is 13.5% larger than that of the latter, and the longitudinal strain of the cast concrete is 59% as large as that of the same area at the beam box with integral construction before concrete cracking; (2) there exists stress redistribution in the cross-section of presented construction, which can restrain the tensional distortion of the wet-joint, and the value of the stress cannot be computed by the current FE program.