一、预应力钢筋混凝土的概念所谓预应力就是在构件或构筑物承受荷载前,对构件或构筑物施加外力,使构件或构筑物的全部或局部预先产生应力,用以克服自身的缺陷,提高承载能力或抗裂、抗渗、耐压等性能。 First, the concept of prestressed reinforced concrete The so-called prestressing means that before a component or a structure is subjected to a load, external forces are applied to the component or structure to cause all or part of the component or structure to be prestressed in advance to overcome its own defects and increase its load carrying capacity. Crack, impermeability, pressure and other properties.