Research On Application Of High-Strength Light Weight Concrete To Highway Beam Bridges

In order to advance the theoretic research and practical application of the high-strength light weight concrete (HSLC) in highway beam bridges, the thesis provided a detailed introduction of the physical properties, construction methods and the design methods of HSLC. The author put emphasis on the design and comparative research of the highway simply-supported beams and continuous beams, which are the representative structures in highway.The author redesigned the common concrete beams and carried out a comparative analysis to the existing beams according to the specification for design of reinforced concrete and prestressed concrete highway bridges and culverts (JTJ023-85), the specification for design of reinforced concrete and prestressed concrete highway bridges and culverts (informal version for advices) and relevant rules of its matching stipulations, light aggregate concrete bridge technology stipulations ((informal version for advices) and on the basis of prestressed concrete theory. The thesis emphasized on the research of the variation of the concrete, prestressing tendon quantities, their spans, beams' height and their rigidity of both the designed beams and the existing beams, and obtained the quantitative results from above research.At the end, the author carried out a preliminary discussion to the practical problems existing in the HSLC beam bridge such as structures, design and construction. Besides, the author put forward several suggestions, with the good wishes to improve it.