【摘要】 通过缓粘结预应力混凝土受弯构件实验研究 ,给出了不同龄期下张拉预应力筋所需克服的摩阻力范围 ,从开裂弯矩、极限弯矩、裂缝形式和荷载 -挠度曲线等各个方面 ,把缓粘结预应力构件与传统的后张法 (有粘结、无粘结 )预应力构件进行了对比分析 ,得出缓粘结预应力构件在张拉两个月后 ,其工作性能可等同于有粘结预应力构件的结论 ,为缓粘结预应力体系设计提供了依据更多还原

【Abstract】 On the basis of the experiment of prestressed concrete beam by placing material of postponing condensation between concrete and prestressed bar, the range of friction resistance which needs to be overcome when prestressed bars are tensioned is presented. Through comparing the prestressed concrete beam with the traditional post tensioned prestressed concrete beam in the aspects such as crack moments, ultimate moments, crack forms, load deflection graph and so on, the conclusion has been gained that the performance of the prestressed concrete beam is almost as same as the traditional post tensioned prestressed concrete beam which has sticky force between concrete and prestressed bar. The conclusion of this paper can provide references for the designer of the prestressed concrete system.更多还原