Segmental precast prestressd concrete girder design

This thesis contains information on the analysis and design of the precast pre-stressed concrete segmental single bridge cell. In this structure, post-tensioning of the cable tendon with a large cross-sectional area, four traffic lanes according to AASHTO LRFD Specified, designed the Bridge by CSI-Bridge software, foundations of prestressed concrete, and losses in the pre-tensile strength, wide span, variable depth and resistance to shear force in the web girder, and varying in the thicknesses of bottom slab. In this study 27 models were designed with some different criteria to get the best model of design segmental precast pre-stressed concrete beam, these criteria are depth of girder with constant (3) m and variable (3 – 4.5) m, and the different of the thickness bottom slab (0.25 – 0.5) m, varies the thickness of web girder (0.45, 0.5, 0.55) m, and different value of post-tension tendon stress (3000, 3500, 4000) KN, with the three different concrete grade C28, C42, C55. As a result, in the analysis of 27 models designed according to the specified criteria, C55 and C42 concrete Grade was used, it was observed that these beams could safely carry the loads specified in the AASHTO LRFD specification, but the models using C28, concrete grade could not safely bear the loads specified in this specification.