loss of prestress

简明释义

预应力损失

英英释义

例句

1.After the seismic event, we observed a significant loss of prestress in the building's framework.

在地震事件后，我们观察到建筑框架中有显著的预应力损失。

2.The loss of prestress can lead to structural failures if not addressed promptly.

如果不及时处理，预应力损失可能导致结构失效。

3.The engineer noted the loss of prestress in the bridge cables after several years of use.

工程师注意到桥梁电缆在使用多年后出现了预应力损失。

4.The contractor implemented measures to mitigate the loss of prestress during construction.

承包商采取措施以减轻施工过程中的预应力损失。

5.To prevent loss of prestress, regular inspections are essential for prestressed concrete structures.

为了防止预应力损失，对预应力混凝土结构定期检查是必不可少的。

作文

In the field of civil engineering, understanding the concept of prestressing is crucial for ensuring the integrity and longevity of structures. Prestressing involves the application of a predetermined amount of stress to a material, typically concrete, before it is subjected to service loads. This technique enhances the load-bearing capacity of structures and minimizes the risk of cracking. However, one significant challenge that engineers face is the loss of prestress, which can occur due to various factors over time. The loss of prestress (预应力损失) refers to the reduction in the initial prestressing force that is applied to the concrete. This loss can be attributed to several reasons, including elastic shortening, creep, shrinkage, and relaxation of the tendons used in the prestressing process. Elastic shortening occurs when the concrete is loaded, causing it to compress and reduce the tension in the tendons. As the concrete cures and hardens, it may also shrink, leading to further reductions in prestress. Creep, a time-dependent deformation of concrete under sustained load, can also contribute to the loss of prestress (预应力损失). Additionally, the relaxation of prestressing tendons, which can happen over time as the material settles into its new state, results in a gradual decrease in the tension that was initially applied. The implications of loss of prestress (预应力损失) are profound. If not properly accounted for, this loss can lead to structural deficiencies, such as increased deflections, cracking, or even failure of the structure. Therefore, it is essential for engineers to design prestressed concrete members with these potential losses in mind. They often employ various strategies to mitigate the effects of loss of prestress (预应力损失), such as selecting materials with better performance characteristics, adjusting the initial prestressing force, or incorporating additional reinforcement. Moreover, understanding the loss of prestress (预应力损失) is not only vital during the design phase but also during the maintenance and inspection of existing structures. Engineers must regularly monitor the condition of prestressed elements to ensure that the prestressing force remains within acceptable limits. Advanced technologies, such as strain gauges and monitoring systems, can help track changes in prestress over time, allowing for timely interventions if necessary. In conclusion, the loss of prestress (预应力损失) is a critical aspect of prestressed concrete design and maintenance. By comprehensively understanding the factors that contribute to this phenomenon and implementing effective design and monitoring strategies, engineers can enhance the durability and safety of structures. The ongoing research and development in this field continue to improve our knowledge and techniques, ensuring that we build safer, more resilient infrastructure for the future.

在土木工程领域，理解预应力的概念对确保结构的完整性和耐久性至关重要。预应力涉及在材料（通常是混凝土）受到服务荷载之前施加预定数量的应力。这种技术增强了结构的承载能力，并最大限度地减少开裂的风险。然而，工程师面临的一个重大挑战是预应力损失，这可能由于时间推移而发生。预应力损失（loss of prestress）是指施加到混凝土上的初始预应力的减少。这种损失可以归因于多种原因，包括弹性缩短、蠕变、收缩以及用于预应力过程中的钢筋松弛。 弹性缩短发生在混凝土受荷时，导致其压缩并减少钢筋的张力。当混凝土固化和硬化时，它也可能收缩，从而导致进一步的预应力减少。蠕变是混凝土在持续荷载下的时间依赖性变形，也会导致预应力损失（loss of prestress）。此外，预应力钢筋的松弛，随着时间的推移，材料进入新状态时的沉降，也会导致最初施加的张力逐渐降低。 预应力损失（loss of prestress）的影响是深远的。如果未能妥善考虑，这种损失可能导致结构缺陷，例如增加的挠度、开裂，甚至结构的失败。因此，工程师在设计预应力混凝土构件时，必须考虑到这些潜在损失。他们通常采用各种策略来减轻预应力损失（loss of prestress）的影响，例如选择性能更好的材料、调整初始预应力或增加额外的加固。 此外，理解预应力损失（loss of prestress）不仅在设计阶段至关重要，还在现有结构的维护和检查中同样重要。工程师必须定期监测预应力构件的状况，以确保预应力保持在可接受的范围内。先进的技术，如应变计和监测系统，可以帮助跟踪随时间变化的预应力，从而在必要时进行及时干预。 总之，预应力损失（loss of prestress）是预应力混凝土设计和维护的关键方面。通过全面了解导致这种现象的因素并实施有效的设计和监测策略，工程师可以增强结构的耐久性和安全性。该领域的持续研究和发展继续改善我们的知识和技术，确保我们为未来建设更安全、更具韧性的基础设施。