pretensioned concrete

简明释义

先张拉混凝土

英英释义

例句

1.The road was paved with pretensioned concrete panels to reduce maintenance costs over time.

这条道路铺设了预应力混凝土板，以减少长期维护成本。

2.Manufacturers prefer pretensioned concrete for precast elements due to its superior strength.

制造商更喜欢使用预应力混凝土用于预制构件，因为它具有优越的强度。

3.The use of pretensioned concrete in parking garages allows for thinner slabs and increased space efficiency.

在停车场中使用预应力混凝土可以使板材更薄，从而提高空间利用效率。

4.The bridge was constructed using pretensioned concrete to enhance its load-bearing capacity.

这座桥是使用预应力混凝土建造的，以增强其承载能力。

5.In high-rise buildings, pretensioned concrete beams are essential for providing structural stability.

在高层建筑中，预应力混凝土梁对于提供结构稳定性至关重要。

作文

The construction industry has seen significant advancements over the years, particularly in the development of materials that enhance structural integrity and durability. One such innovation is pretensioned concrete, which is a method of reinforcing concrete to withstand greater loads and stresses. This technique involves the use of high-strength steel tendons that are tensioned before the concrete is poured. By doing so, the concrete is placed under compression, which helps it resist tensile forces once it is cured. The result is a material that not only provides superior performance but also allows for longer spans in architectural designs.The process of creating pretensioned concrete begins with the installation of steel tendons in a mold. These tendons are typically made from high-strength steel cables or bars. Before the concrete is poured, these tendons are stretched using hydraulic jacks, which applies tension to them. Once the concrete is poured and has reached its desired strength, the tension on the steel tendons is released. This release of tension compresses the concrete, making it more resilient to cracking and deformation under load.One of the primary advantages of pretensioned concrete is its ability to span longer distances without the need for intermediate supports. This characteristic makes it particularly valuable in the construction of bridges, parking garages, and large commercial buildings. For instance, when constructing a bridge, engineers can utilize pretensioned concrete to create longer spans that reduce the number of piers needed, ultimately leading to lower construction costs and a more aesthetically pleasing design.Additionally, pretensioned concrete offers enhanced durability. The compression within the concrete counteracts the tensile stresses that can lead to cracking, thereby extending the lifespan of structures. This durability is further augmented by the fact that pretensioned concrete can be designed to resist various environmental factors, such as moisture and chemical exposure, making it suitable for use in harsh conditions.Another important aspect of pretensioned concrete is its efficiency in terms of material usage. By allowing for thinner slabs and reduced cross-sectional areas, this method minimizes the amount of concrete required, contributing to more sustainable building practices. Moreover, the use of pretensioned concrete can lead to faster construction times, as the prefabricated elements can be manufactured off-site and assembled on-site, reducing labor costs and disruptions.In conclusion, pretensioned concrete represents a significant advancement in construction technology. Its ability to provide strength, durability, and efficiency makes it an ideal choice for modern engineering projects. As architects and engineers continue to push the boundaries of design, the use of pretensioned concrete will undoubtedly play a crucial role in shaping the future of our built environment. Understanding the principles and applications of pretensioned concrete is essential for anyone involved in the construction industry, as it not only enhances structural performance but also contributes to innovative and sustainable design solutions.

建筑行业多年来经历了显著的进步，特别是在增强结构完整性和耐用性的材料开发方面。其中一种创新是预应力混凝土，它是一种通过加固混凝土以承受更大负荷和应力的方法。这种技术涉及使用高强度钢筋，在浇筑混凝土之前进行张拉。通过这样做，混凝土被置于压缩状态，这有助于它在固化后抵抗拉伸力。结果是这种材料不仅提供卓越的性能，还允许建筑设计中的更长跨度。创建预应力混凝土的过程始于在模具中安装钢筋。这些钢筋通常由高强度钢缆或钢筋制成。在浇筑混凝土之前，这些钢筋会使用液压千斤顶进行拉伸，从而施加张力。一旦混凝土被浇筑并达到所需的强度，钢筋上的张力就会释放。这种张力的释放使混凝土处于压缩状态，使其在负载下更具抗裂和变形的能力。预应力混凝土的主要优点之一是它能够在没有中间支撑的情况下跨越更长的距离。这一特性使其在桥梁、停车场和大型商业建筑的建设中尤其有价值。例如，在建设桥梁时，工程师可以利用预应力混凝土来创建更长的跨度，从而减少所需的支柱数量，最终降低施工成本并实现更美观的设计。此外，预应力混凝土还具有增强的耐久性。混凝土内部的压缩力抵消了可能导致开裂的拉伸应力，从而延长了结构的使用寿命。这种耐久性进一步加强，因为预应力混凝土可以设计成抵抗各种环境因素，如潮湿和化学物质的侵蚀，使其适合在恶劣条件下使用。预应力混凝土的另一个重要方面是其在材料使用上的效率。通过允许更薄的板材和减少的截面面积，这种方法最小化了所需混凝土的数量，有助于更可持续的建筑实践。此外，使用预应力混凝土可以缩短施工时间，因为预制构件可以在工厂制造并在现场组装，从而降低劳动力成本和干扰。总之，预应力混凝土代表了建筑技术的重要进步。其提供强度、耐久性和效率的能力，使其成为现代工程项目的理想选择。随着建筑师和工程师不断推动设计的边界，预应力混凝土的使用无疑将在塑造我们建成环境的未来中发挥关键作用。理解预应力混凝土的原理和应用对于任何参与建筑行业的人来说都是至关重要的，因为它不仅增强了结构性能，还有助于创新和可持续的设计解决方案。