Later other prestressing methods with parallel wire or strand tendons were also used. 后来，又使用其它的预应方法，如利用平行钢丝或钢绞线施加预应力。
The material properties of prestressed steel strand post high temperatures are studied by experiments and various cooling patterns are considered in the experiments. 试验研究预应力钢绞线在经历高温作用并冷却至室温后的力学性能。
