pretensioning

简明释义

英[prɪˈtɛnʃənɪŋ]美[prɪˈtɛnʃənɪŋ]

n. 先张拉；先张技术；[力] 预拉伸

英英释义

单词用法

同义词

反义词

例句

1.The paper introduced the construction technology of prestress pretensioning method, analyzed prestress loss by construction experience for reference.

介绍了预应力先张法施工工艺，并根据实际施工经验，对预应力损失进行了分析，具有一定的参考价值。

2.The testing methods on extension of anchor bolt are introduced. The whole deformations of normal bolts under pretensioning and its effect on the jacking of surrounding rock are pointed out.

通过对锚杆延伸性能测试方法的介绍，计算出了几种常用锚杆在预紧加固条件下的整体变形量，并结合井下实用情况指出不同性能锚杆对围岩加固的影响。

3.The testing methods on extension of anchor bolt are introduced. The whole deformations of normal bolts under pretensioning and its effect on the jacking of surrounding rock are pointed out.

通过对锚杆延伸性能测试方法的介绍，计算出了几种常用锚杆在预紧加固条件下的整体变形量，并结合井下实用情况指出不同性能锚杆对围岩加固的影响。

4.Anchorage can be classified as active anchorage, in the case in which they are subjected to pretensioning, and passive anchorage.

可分为主动锚碇锚固，在一宗案件中，他们是受防水层、被动的停泊地。

5.Objective To study the effect of pretensioning on quadrupled-stranded semitendinosus and gracilis tendon graft length during anterior cruciate ligament reconstruction.

目的探讨前交叉韧带重建术中移植物预牵张对其长度的影响。

6.The paper analyses the formation process for pretensioning prestressed hollow plank precamber, announces inside reason for prestressed hollow plank precamber to public.

通过对先张法预应力梁板预拱度产生的过程进行分析，揭示预应力梁板预拱度产生的内在原因。

7.The paper introduces specific construction process of pretensioning cored slab beam at some length, improves existing problems in construction.

就先张法预应力混凝土空心板梁的施工过程作了详细的介绍，对施工中存在的问题作了相应的改进措施。

8.The team implemented pretensioning techniques to reduce deflection in the large span structures.

团队实施了预张拉技术，以减少大跨度结构的挠度。

9.The process of pretensioning involves stretching the tendons before the concrete is poured.

预张拉的过程涉及在浇筑混凝土之前拉伸钢筋。

10.During the construction, pretensioning was used to enhance the strength of the concrete beams.

在施工过程中，使用了预张拉来增强混凝土梁的强度。

11.By applying pretensioning, they were able to improve the durability of the pavement.

通过施加预张拉，他们能够提高路面的耐久性。

12.The engineers discussed the process of pretensioning to ensure the structural integrity of the bridge.

工程师们讨论了预张拉的过程，以确保桥梁的结构完整性。

作文

In the field of civil engineering and construction, one often encounters various techniques designed to enhance the strength and durability of materials. One such technique is known as pretensioning. This method involves applying a tensile force to steel tendons before they are anchored in concrete. By doing so, the concrete is put into compression, which significantly improves its performance under load. The concept of pretensioning is crucial for understanding how modern structures can withstand various stresses, including those caused by heavy loads or environmental factors.The process of pretensioning begins with the placement of high-strength steel cables or rods within a mold. These tendons are then stretched using hydraulic jacks. Once the desired tension is achieved, concrete is poured into the mold around the tendons. After the concrete has cured and gained sufficient strength, the tension on the tendons is released. This release causes the tendons to push against the concrete, effectively placing it in compression. The result is a composite structure that can bear greater loads than traditional reinforced concrete.The advantages of pretensioning are numerous. For one, it allows for longer spans in bridges and buildings without the need for additional support columns. This not only enhances the aesthetic appeal of structures but also optimizes the use of space. Furthermore, because the concrete is placed under compression, it becomes more resistant to cracking and other forms of deterioration, extending the lifespan of the structure.However, the implementation of pretensioning is not without its challenges. The initial setup requires precise calculations and careful planning to ensure that the right amount of tension is applied. If the tension is too high, it can lead to structural failure, while insufficient tension may result in inadequate performance. Additionally, the materials used in pretensioning must be of high quality to withstand the forces involved in the process.In conclusion, pretensioning is a vital technique in modern construction that enhances the strength and durability of concrete structures. Its ability to improve load-bearing capacity while minimizing material usage makes it an attractive option for engineers and architects alike. As we continue to push the boundaries of architectural design and construction methods, understanding and mastering techniques like pretensioning will be essential for future innovations in the field. Ultimately, the successful application of pretensioning not only contributes to the safety and longevity of structures but also plays a significant role in advancing sustainable construction practices.

在土木工程和建筑领域，人们常常会遇到各种旨在增强材料强度和耐久性的技术。其中一种技术被称为预应力。这种方法涉及在混凝土锚固之前对钢筋施加拉伸力。通过这样做，混凝土被压缩，从而显著改善其承载性能。理解预应力的概念对于理解现代结构如何承受各种压力非常重要，包括重载或环境因素造成的压力。预应力的过程始于将高强度钢缆或杆放置在模具中。这些筋材随后使用液压千斤顶被拉伸。一旦达到所需的张力，就会在筋材周围浇筑混凝土。混凝土固化并获得足够强度后，筋材上的张力被释放。这种释放导致筋材推动混凝土，有效地将其置于压缩状态。最终结果是一个复合结构，其承载能力超过传统的钢筋混凝土。预应力的优点有很多。首先，它允许桥梁和建筑物在没有额外支撑柱的情况下实现更长的跨距。这不仅增强了结构的美观性，还优化了空间的使用。此外，由于混凝土处于压缩状态，它对开裂和其他形式的劣化变得更加抵抗，从而延长了结构的使用寿命。然而，实施预应力并非没有挑战。初始设置需要精确的计算和仔细的规划，以确保施加正确的张力。如果张力过高，可能导致结构失效，而张力不足则可能导致性能不足。此外，用于预应力的材料必须具有高质量，以承受过程中的力量。总之，预应力是现代建筑中一种重要的技术，能够增强混凝土结构的强度和耐久性。它提高承载能力的同时减少材料使用，使其成为工程师和建筑师的理想选择。随着我们不断突破建筑设计和施工方法的界限，理解和掌握像预应力这样的技术将是未来该领域创新的关键。最终，成功应用预应力不仅有助于结构的安全和持久性，还在推进可持续建筑实践方面发挥着重要作用。