为通过裂缝控制方程和承载力方程计算、确定预应力筋用量和非预应力筋用量创造了条件。
It gives condition for accounting area of common bars and area of prestressing bars by equations of crack controlling and capacity carrying.
在拉杆拱体系中，梁底预应力筋和非预应力筋成为主要的受拉部分，拉杆上方成为低应力区。
In this system, the steel wires and steel bars are the main parts that bear the tensile force, the stress in the district above the dragging bar is low.
试验结果表明，随着受拉区非预应力筋配筋率和预应力筋配筋率的增大，梁的延性逐渐减小；
The experimental results show that the ductility of the beams decreases gradually with the increasing of non prestressed and prestressed reinforcement index in the strained zone;
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