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预应力混凝土构件和结构可以有效利用高标号混凝土和高强度钢材,达到改善性能、节约材料和降低造价的目的。预应力混凝土构件的使用已相当普遍。单层工业厂房的屋面板、屋架、吊车梁,特别是民用建筑中的小跨度空心板,采用预应力混凝土构件已经成为人们公认的习惯。近十年来,预应力混凝土结构的兴起,使预应力技术又有了新的发展。不仅结构构件可以施加预应力,还可以
Prestressed concrete components and structures can effectively use high-grade concrete and high-strength steel to achieve the goal of improving performance, saving material, and reducing cost. The use of prestressed concrete elements has become quite common. Single-layer industrial plant roof panels, roof trusses, crane girders, and especially small-span hollow slabs in civil buildings, have adopted prestressed concrete members as a recognized practice. In the past ten years, the rise of prestressed concrete structures has brought new developments in prestressed technology. Not only structural members can be prestressed but also