本节主要讲授与预应力原理相关的专业词汇、关键语法、复杂复合句的理解与翻译。

    (1) 预应力原理 (Principle of prestressing)

    (2) 预应力的两种施加方式 (Two application ways of prestressing)

       ① 先张法 (Pretensioning)

       ② 后张法 (Post-tensioning)

【选择题】

1. In          members the prestressing strands are tensioned against restraining bulkheads before the concrete is cast.

(A) pretensioning; (B) post-tensioning; (C) pretensioned; (D) post-tensioned.

2. Prestressing by         involves installing and stressing prestressing strand of bar tendons only after the concrete has been placed, hardened and attained a minimum compressive strength for that transfer.

(A) pretensioning; (B) post-tensioning; (C) pretensioned; (D) post-tensioned.

【简答题】

1. How is the principle of prestressing?

【词汇英译汉】

1. prestressing force

2. channel section

3. cast

4. install

5. camber

【答案】

1. 预应力

2. 槽形截面

3. 浇筑

4. 安装

5. 预拱度，弧度

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【句子汉译英】

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。

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。

【答案】

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