缓粘结预应力混凝土构件试验研究

Text study on retarded anhesive prestressed concrete component

缓粘结预应力混凝土是取后张法预应力混凝土中无粘结和有粘结各自之长 ,避各自之短 ,所形成的一种新型独特的预应力形式。通过对缓凝砂浆多种性能测试 ,能满足用于包裹预应力筋 ,并形成缓粘结预应力混凝土。通过对缓粘结预应力筋的张拉摩阻、梁体承载能力和破坏模式的测试 ,建立了相应的便于应用的整套设计计算方法。

Retarded adhesive prestressed concrete is a new distinctive prestressed type.It absorbs the good parts and abandons the unfavorable parts of adhesive and non adhesive in post tensioning prestressed concrete.After testing many performances of retarded mortar,it adapts to wrap up prestressed bar and then forms the retarded adhesive prestressed concrete.In final,a whole convenient design and calculated method have been establiched by testing the tensioned frictional resistance of retarded adhesive prestressed bar,the bearing capacity and the failure pattern of beam components.