prestressing

简明释义

英[ˈprɛsˌtrɛsɪŋ]美[ˈprɛsˌtrɛsɪŋ]

n. 预应力；[力]预加应力；预加强

v. 给……预加应力（prestress 的 ing 形式）

英英释义

单词用法

同义词

反义词

例句

1.External prestressing is a kind of no felt prestress.

体外预应力是无粘结预应力的一种。

2.The vertical tendon had to be prestressed twice to ensure effective prestressing.

竖向预应力应两次张拉以保证有效预应力。

3.Studies on prestressing strengthening are focused on prestressing level, end anchorage and prestressing losing etc.

预应力加固的研究主要集中于预应力控制值、端部锚固和预应力损失方面。

4.The results show that the formula can accurately give the distribution of effective prestressing force of a loop prestressed cable.

计算结果显示该计算公式能够准确地算出环形预应力束的有效预应力分布。

5.P The prestressing tendons shall have adequate ductility, as specified in en 10138.

预应力筋必须有EN 10138中规定的足够塑性。

6.The feature and calculating principle that steel structures strengthened by prestressing have is introduced here.

介绍了预应力加固钢结构所具有的特点和计算原则；

7.The use of prestressing can significantly reduce cracking in concrete elements.

使用预应力可以显著减少混凝土构件的裂缝。

8.Engineers often use prestressing techniques to enhance the durability of bridges.

工程师们经常使用预应力技术来增强桥梁的耐久性。

9.During construction, the team focused on the prestressing of beams to ensure stability.

在施工期间，团队专注于梁的预应力以确保稳定性。

10.The process of prestressing in concrete structures helps to improve their load-bearing capacity.

在混凝土结构中，预应力的过程有助于提高它们的承载能力。

11.The application of prestressing allows for longer spans in architectural designs.

应用预应力使建筑设计中的跨度更长。

作文

Prestressing is a technique used in construction and civil engineering to improve the performance of concrete structures. It involves the application of pre-compression to the concrete before it is subjected to external loads. This method is particularly beneficial because concrete is strong in compression but weak in tension. By introducing internal stresses, or 'prestressing', the tensile strength of the concrete can be significantly enhanced, allowing for longer spans and reduced material usage.The concept of prestressing (预应力) dates back to the early 20th century and has evolved over the decades into a standard practice in modern engineering. There are two primary methods of prestressing (预应力): pretensioning and post-tensioning. In pretensioning, steel tendons are stretched before the concrete is poured. Once the concrete has cured, the tendons are released, transferring the stress to the concrete. In post-tensioning, the tendons are placed within ducts in the concrete and tensioned after the concrete has cured. Both methods have their advantages and applications depending on the specific requirements of a project.One of the major advantages of prestressing (预应力) is that it allows for the construction of larger and more efficient structures. For example, bridges designed with prestressing (预应力) can span greater distances without the need for numerous support columns, which can obstruct traffic and reduce usable space. This has led to the development of iconic structures around the world, such as the Sydney Harbour Bridge and the Golden Gate Bridge.Furthermore, prestressing (预应力) contributes to the durability and longevity of structures. By minimizing tensile stresses, it reduces the risk of cracking and other forms of damage that can compromise structural integrity over time. Engineers can design buildings and bridges that withstand not only static loads but also dynamic forces such as wind, earthquakes, and heavy traffic.In addition to its structural benefits, prestressing (预应力) can also lead to cost savings in construction. By using less material while achieving the same or better performance, projects can be completed more efficiently. This is especially important in today's world, where sustainability and resource management are critical considerations in all aspects of construction.However, the implementation of prestressing (预应力) does come with challenges. The process requires careful planning and execution, as any miscalculation in the amount of stress applied can lead to failure. Moreover, the materials used must be of high quality to ensure the effectiveness of the prestressing (预应力) process. Engineers and contractors must be well-trained and experienced in these techniques to mitigate risks and ensure safety.In conclusion, prestressing (预应力) is a revolutionary technique that has transformed the field of civil engineering. Its ability to enhance the performance of concrete structures has made it a staple in modern construction, enabling the creation of larger, more durable, and cost-effective designs. As technology continues to advance, the methods and applications of prestressing (预应力) will likely evolve, further pushing the boundaries of what is possible in architecture and engineering.