permissible deflection

简明释义

允许挠度

英英释义

例句

1.The engineer calculated the maximum permissible deflection 允许挠度 for the bridge to ensure safety.

工程师计算了桥梁的最大允许挠度 permissible deflection以确保安全。

2.In residential buildings, the permissible deflection 允许挠度 for floor joists is typically limited to L/360.

在住宅建筑中，楼板托梁的允许挠度 permissible deflection通常限制为L/360。

3.During the inspection, the contractor was reminded of the permissible deflection 允许挠度 guidelines for roof trusses.

在检查过程中，承包商被提醒屋顶桁架的允许挠度 permissible deflection指南。

4.The design specifications included a detailed table of permissible deflection 允许挠度 values for various materials.

设计规范中包含了各种材料的详细允许挠度 permissible deflection值表。

5.To avoid structural damage, it is crucial to adhere to the permissible deflection 允许挠度 limits set by building codes.

为了避免结构损坏，遵守建筑规范设定的允许挠度 permissible deflection限制至关重要。

作文

In the field of civil engineering and construction, understanding the concept of permissible deflection is crucial for ensuring the safety and longevity of structures. Permissible deflection refers to the maximum allowable displacement of a structural element under load without causing damage or unacceptable performance issues. This concept is vital when designing beams, slabs, and other structural components, as excessive deflection can lead to structural failure, aesthetic concerns, and functional impairments. When engineers design a structure, they must consider various factors that influence permissible deflection, including the material properties, loading conditions, and the intended use of the building. Different materials have different stiffness characteristics; for instance, steel beams are generally more rigid than wooden beams, which means they can withstand greater loads with less deflection. As a result, the permissible deflection for a steel beam might be different from that of a wooden beam, even if both are subjected to the same load. Moreover, the type of loading also plays a significant role in determining permissible deflection. Structures may experience static loads, such as the weight of furniture and occupants, or dynamic loads, like wind or seismic forces. Dynamic loads can cause greater deflections due to their varying nature, and thus, engineers must account for these scenarios when calculating permissible deflection. The intended use of the building also influences the acceptable limits of deflection. For example, in residential buildings, the permissible deflection might be more lenient compared to commercial spaces where precision and aesthetics are paramount. In spaces like theaters or auditoriums, even slight deflections can affect sound quality and sightlines, necessitating stricter limits on permissible deflection. To ensure that structures meet the required standards, engineers often refer to building codes and guidelines that specify acceptable limits for permissible deflection. These codes are developed based on extensive research and testing to ensure safety and functionality. For instance, the American Concrete Institute (ACI) and the American Institute of Steel Construction (AISC) provide guidelines that help engineers determine appropriate deflection limits based on the type of structure and its use. In practice, calculating permissible deflection involves using mathematical formulas and models to predict how much a structural element will deflect under specific loads. Engineers perform these calculations during the design phase to ensure that all elements will remain within the specified limits throughout the life of the structure. Additionally, monitoring systems can be installed to track deflection over time, providing valuable data for maintenance and future assessments. In conclusion, the concept of permissible deflection is an essential aspect of structural engineering that ensures the safety, functionality, and longevity of buildings. By understanding and applying this principle, engineers can design structures that not only meet aesthetic and performance requirements but also stand the test of time against various loads and environmental factors. As our understanding of materials and engineering practices continues to evolve, so too will our approaches to managing permissible deflection, ultimately leading to safer and more resilient structures.

在土木工程和建筑领域，理解允许变形的概念对于确保结构的安全性和耐久性至关重要。允许变形是指在负载下，结构构件最大允许位移而不造成损坏或不可接受的性能问题。这个概念在设计梁、板和其他结构组件时至关重要，因为过度的变形可能导致结构失效、美观问题和功能障碍。当工程师设计结构时，他们必须考虑影响允许变形的各种因素，包括材料特性、加载条件和建筑物的预期用途。不同的材料具有不同的刚度特性；例如，钢梁通常比木梁更刚性，这意味着它们可以在较小的变形下承受更大的负载。因此，钢梁的允许变形可能与木梁不同，即使两者承受相同的负载。此外，荷载类型也在确定允许变形中起着重要作用。结构可能会经历静态荷载，如家具和居住者的重量，或动态荷载，如风或地震力。由于动态荷载的变化特性，可能导致更大的变形，因此工程师在计算允许变形时必须考虑这些情景。建筑物的预期用途也会影响变形的可接受限制。例如，在住宅建筑中，允许变形的限制可能相对宽松，而在商业空间中，精确性和美观性则至关重要。在剧院或礼堂等空间中，即使是轻微的变形也会影响音质和视线，因此需要对允许变形施加更严格的限制。为了确保结构符合所需标准，工程师通常参考建筑规范和指南，这些规范和指南规定了允许变形的可接受限制。这些规范是基于广泛的研究和测试制定的，以确保安全性和功能性。例如，美国混凝土学会（ACI）和美国钢结构协会（AISC）提供的指南帮助工程师根据结构类型及其用途确定适当的变形限制。在实际操作中，计算允许变形涉及使用数学公式和模型来预测在特定负载下结构构件的变形程度。工程师在设计阶段执行这些计算，以确保所有构件在整个结构使用寿命内保持在规定的限制内。此外，可以安装监测系统来跟踪随时间变化的变形，为维护和未来评估提供有价值的数据。总之，允许变形的概念是结构工程的重要方面，确保建筑物的安全性、功能性和耐久性。通过理解和应用这一原则，工程师能够设计出不仅满足美观和性能要求，还能经受各种荷载和环境因素考验的结构。随着我们对材料和工程实践的理解不断发展，我们管理允许变形的方法也将不断演变，最终将导致更安全、更具韧性的结构。