Secondly,the least length of pretensioned prestressed concrete slab is defined to make the full use of steel strand strength and avoid flexural crack occurs within the development length.

• 首先分析了高强钢绞线在先张预应力构件中的粘结锚固性能,将预应力传递长度与弯曲粘结长度之和定义为延伸长度,给出了延伸长度的计算公式。