losses of prestress

简明释义

预应力损失

英英释义

例句

1.Understanding the losses of prestress is crucial for designing durable concrete beams.

理解预应力损失对于设计耐用的混凝土梁至关重要。

2.During the inspection, we found that the losses of prestress were higher than expected due to temperature fluctuations.

在检查过程中，我们发现由于温度波动，预应力损失高于预期。

3.To mitigate the losses of prestress, we added additional tendons to the design.

为了减轻预应力损失，我们在设计中增加了额外的钢筋。

4.The engineer calculated the losses of prestress to ensure the structure would remain stable over time.

工程师计算了预应力损失以确保结构在时间上保持稳定。

5.The report highlighted the importance of monitoring losses of prestress in long-span structures.

报告强调了监测长跨结构中预应力损失的重要性。

作文

In the field of civil engineering, particularly in the design and construction of prestressed concrete structures, understanding the concept of losses of prestress is crucial. Prestressing is a technique that involves applying a pre-compressive force to concrete elements, which enhances their performance under service loads. However, during the life cycle of a structure, certain factors can lead to a reduction in this prestressing force, which is referred to as losses of prestress (预应力损失). These losses can significantly affect the structural integrity and longevity of concrete elements, making it essential for engineers to account for them in their designs.There are several reasons why losses of prestress occur. One primary factor is the elastic shortening of concrete. When the prestressing tendons are tensioned, the concrete element undergoes a slight shortening due to the applied load. This shortening can lead to a decrease in the effective prestressing force. Additionally, creep and shrinkage of concrete over time can also contribute to losses of prestress (预应力损失). Creep refers to the gradual deformation of concrete under sustained load, while shrinkage is the reduction in volume as the concrete dries. Both phenomena can result in a gradual loss of the initial prestressing force.Another significant aspect to consider is the relaxation of the prestressing steel itself. As the steel strands are subjected to high levels of stress, they can experience a phenomenon known as stress relaxation, where the stress in the steel decreases over time while maintaining the same strain. This relaxation leads to losses of prestress (预应力损失) and can be particularly pronounced in long-term applications. Therefore, engineers must carefully analyze these factors when designing prestressed concrete structures to ensure they remain safe and functional throughout their intended lifespan.To mitigate the effects of losses of prestress, various strategies can be employed. For instance, engineers can incorporate additional prestressing tendons or increase the initial prestressing force to compensate for anticipated losses. They may also use high-strength concrete and prestressing steel, which exhibit better resistance to creep and shrinkage. Furthermore, understanding the environmental conditions that the structure will be exposed to can help in predicting the extent of losses of prestress (预应力损失) and making necessary adjustments during the design phase.In conclusion, the concept of losses of prestress (预应力损失) is a vital consideration in the design and analysis of prestressed concrete structures. By recognizing the factors that contribute to these losses and implementing effective mitigation strategies, engineers can enhance the durability and performance of their designs. As the field of civil engineering continues to evolve, a thorough understanding of losses of prestress will remain essential for ensuring the safety and longevity of concrete structures, ultimately leading to more resilient infrastructure for future generations.

在土木工程领域，特别是在预应力混凝土结构的设计和施工中，理解预应力损失这一概念至关重要。预应力是一种技术，通过对混凝土构件施加预压缩力来增强其在服务荷载下的性能。然而，在结构的生命周期中，某些因素可能导致这种预应力的减少，这被称为预应力损失。这些损失会显著影响混凝土构件的结构完整性和耐久性，因此工程师在设计时必须考虑到它们。预应力损失的发生有几个原因。一个主要因素是混凝土的弹性缩短。当预应力筋被拉紧时，混凝土构件因施加的荷载而发生轻微缩短。这种缩短可能导致有效的预应力力降低。此外，混凝土随时间的蠕变和收缩也可能导致预应力损失。蠕变是指在持续荷载下混凝土的逐渐变形，而收缩则是混凝土干燥时体积的减少。这两种现象都可能导致初始预应力力的逐渐损失。另一个重要方面是预应力钢本身的松弛。当钢绞线承受高水平的应力时，会经历一种称为应力松弛的现象，即在保持相同应变的情况下，钢中的应力随时间降低。这种松弛会导致预应力损失，并且在长期应用中尤为明显。因此，工程师在设计预应力混凝土结构时，必须仔细分析这些因素，以确保它们在预期的使用寿命内保持安全和功能。为了减轻预应力损失的影响，可以采用各种策略。例如，工程师可以增加额外的预应力筋或提高初始预应力力，以补偿预期的损失。他们还可以使用高强度混凝土和预应力钢，这些材料在抵抗蠕变和收缩方面表现更好。此外，了解结构将面临的环境条件可以帮助预测预应力损失的程度，并在设计阶段进行必要的调整。总之，预应力损失是预应力混凝土结构设计和分析中必须考虑的重要因素。通过认识导致这些损失的因素并实施有效的缓解策略，工程师可以增强设计的耐久性和性能。随着土木工程领域的不断发展，对预应力损失的全面理解将继续对确保混凝土结构的安全性和耐久性至关重要，最终为未来几代人提供更具韧性的基础设施。