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本项研究采用高性能材料制成的高强混凝土与高强预应力(PC)钢筋,以预应力先张法预制腹板构成的箱型梁桥为对象,按现有研发成果集中进行了高强混凝土试验和研究,具体项目包括混凝土配合比和强度,混凝土耐久性以及施工性等;高强预应力(PC)钢绞线试验研究,其具体项目包括机械性能,采用高强预应力(PC)钢绞线的必要性与核实体外预应力结构使用的必要性与核查,高性能预应力钢绞线性能的核查结果等。在以上系列试验研究基础上,进行了预制预应力腹板箱
In this study, high-strength concrete and high-strength prestressed (PC) steel bars made of high-performance materials were used. The box girder bridge consisting of prestressed pre-tensioned prefabricated webs was taken as the object. According to the existing research results, And research projects, including concrete mix and strength, concrete durability and workability; high-strength prestressed (PC) strand test research, the specific items include mechanical properties, the use of high-strength prestressed (PC) strand The necessity and verification of the necessity and verification of the use of external prestressing structure, the verification of the performance of high-performance prestressing strands and the like. Based on the above series of experimental studies, a prefabricated prestressed web box was constructed