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A new bridge construction method, combining semi-precast elements and in situ concrete, has been developed at TU Wien, with the aim of decreasing erection time. In course using this structural conditions arise that render a more detailed investigation necessary. By connecting precast, thin-walled box girder to segment located on pier by means post-tensioning, joint is created. casting concrete ...

Corrosion is a major deterioration mechanism of carbon steel bridges. Multiple maintenance actions have been proposed to meet the safety requirements for bridges subjected corrosion, including preventive maintenance, such as repainting, and essential girder replacement. Recently, corrosion-resistant has adopted bridge construction. However, comprehensive comparison different strategies still an...

This research presents experimental and theoretical investigation of 15 reinforced concrete spliced nonspliced girder models. Splices hooked dowels cast in place joints, with or without strengthening steel plates were used. Post-tensioning had been used to enhance the splice strength for some girders. The ANSYS computer program was analyzing non-spliced A nonlinear three dimensional element rep...

The three major vacuum systems serving the two-mile accelerator, the optical alignment system light pipe, and the beam switchyard (BSY) transport vacuum chambers are located as shown in Fig. 23-1. The accelerator vacuum system must maintain a very high vacuum in the accelerator to prevent RF electrical breakdown and electron scatter. Thirtytwo subsystems evacuate the accelerator to a design pre...