Design of T-Frame Bridge of Mashui River Bridge

Mashui River Bridge is a long span T-frame bridge with span arrangement(116+116) m.The main girder of the bridge is a prestressed concrete girder of variable section,having a single cell single box and vertical webs.The top of the girder is 10.7 m in width and the bottom varies in round arc.The main pier of the bridge is 108 m high and the pier shaft is the high-rise rectangular hollow pier that has no solid section close to the top of the pier and is connected with the girder in a way of spatial frame.The foundation for the pier is composed of 24 nos.of 2.5 m reinforced concrete bored piles,the concrete for the piles is of C30 and a 7.5 m high training dike is set at the footing of the pier.The BSAS and ANSYS are respectively used to conduct the structural static force calculation and spatial static and dynamic force analysis.The results of the calculation and analysis show that the static force,wind resistance,seismic resistance and dynamic response of the vehicle and bridge can all satisfy the relevant requirements in the codes.The pier shaft of the bridge is constructed by the backward inclined cantilever formwork and the main girder is constructed by the free balanced cantilever concreting method.