Unit 8 Fundamentals of prestressing

词汇

1.bonded tendon 有粘结预应力筋

2. unbonded tendon无粘结预应力筋

3. channel section槽形截面

4. post-tensioning后张法

5. pretensioning先张法

6. strand  绞线

7.monostrand tendon单绞线

8.multistrand tendon多绞线

9. crack 裂缝

10. wedge plate锚垫板

句子

1. 预应力的功能是使外荷载作用下混凝土结构的受拉区处于受压状态，因此可以减少或消除混凝土的开裂，从而形成耐久的混凝土结构。

The function of prestressing is to place the concrete structure under compression in those regions where load causes tensile stress, therefore to reduce or eliminate cracking and produce durable concrete structures.

2. 预应力可以通过两种方式施加在混凝土构件中，先张法或后张法。

Prestressing can be applied to concrete members in two ways, by pretensioning or post-tensioning.

3. 先张系统中，在浇筑混凝土之前，在两个拱座间张拉高强钢筋。

In pre-tensioning system, the high-strength steel tendons are pulled between two end abutments prior to the casting of concrete.