permissible stress method

简明释义

容许应力法

英英释义

例句

1.The engineer decided to use the permissible stress method to ensure the bridge could withstand heavy loads.

工程师决定使用允许应力法来确保桥梁能够承受重载。

2.In structural analysis, the permissible stress method is crucial for determining material limits.

在结构分析中，允许应力法对确定材料极限至关重要。

3.Using the permissible stress method, the team calculated the maximum load for the steel beams.

通过使用允许应力法，团队计算了钢梁的最大载荷。

4.The permissible stress method helps prevent structural failures by adhering to safety standards.

允许应力法通过遵循安全标准来帮助防止结构故障。

5.During the design phase, the architect relied on the permissible stress method for the foundation.

在设计阶段，建筑师依赖于允许应力法来设计基础。

作文

The field of structural engineering relies heavily on various methodologies to ensure the safety and integrity of structures. One such method is the permissible stress method, which is crucial for determining how much load a material can safely withstand without experiencing failure. This approach is particularly important in designing buildings, bridges, and other infrastructures where safety is paramount. The permissible stress method involves calculating the maximum allowable stress that materials can experience under service conditions. This calculation takes into account factors such as the material properties, environmental conditions, and the nature of the loads applied to the structure.In practice, engineers begin by selecting appropriate materials based on their mechanical properties, such as yield strength and ultimate tensile strength. The permissible stress method then requires them to apply a safety factor to these strengths to determine the permissible stress levels. This safety factor accounts for uncertainties in material behavior, variations in loading conditions, and potential flaws in construction. By applying this method, engineers can design structures that not only meet regulatory standards but also provide a margin of safety for unforeseen circumstances.One of the advantages of the permissible stress method is its simplicity. It provides a clear and straightforward way to assess the capacity of materials, making it easier for engineers to communicate their designs to clients and stakeholders. However, it is essential to recognize that this method has its limitations. For instance, it does not account for the effects of long-term loading or environmental degradation, which can significantly affect a material's performance over time.Additionally, the permissible stress method is primarily applicable to elastic materials, meaning it is most effective when dealing with materials that return to their original shape after the load is removed. In cases where materials exhibit plastic behavior, engineers may need to employ more advanced methods, such as limit state design or load and resistance factor design (LRFD), which consider both the ultimate strength and serviceability of the structure.Moreover, the application of the permissible stress method varies across different materials. For example, concrete and steel are commonly analyzed using this method, but the specific calculations and safety factors may differ. Concrete is often evaluated based on its compressive strength, while steel is assessed for its tensile and compressive capacities. Understanding these nuances is critical for engineers to apply the permissible stress method effectively in their designs.In conclusion, the permissible stress method serves as a foundational approach in structural engineering, allowing engineers to ensure that structures can safely support expected loads. While it offers simplicity and clarity, engineers must remain aware of its limitations and apply additional methods when necessary. As technology and materials science continue to evolve, so too will the methodologies used in engineering, but the permissible stress method will likely remain a key component of safe and effective structural design.

结构工程领域在确保结构安全和完整性方面高度依赖各种方法。其中一种方法是允许应力法，它对于确定材料在不发生失效的情况下可以安全承受的负载至关重要。这种方法在设计建筑、桥梁和其他基础设施时特别重要，因为安全至关重要。允许应力法涉及计算材料在服务条件下可以承受的最大允许应力。这一计算考虑了材料属性、环境条件以及施加于结构上的负载性质等因素。在实践中，工程师首先根据材料的机械性能（如屈服强度和极限拉伸强度）选择合适的材料。然后，允许应力法要求他们对这些强度应用安全系数，以确定允许的应力水平。这个安全系数考虑了材料行为的不确定性、负载条件的变化以及施工中的潜在缺陷。通过应用这种方法，工程师可以设计出不仅符合监管标准，而且为不可预见的情况提供安全裕度的结构。允许应力法的一个优点是其简单性。它提供了一种清晰而直接的方法来评估材料的承载能力，使工程师能够更容易地将其设计传达给客户和利益相关者。然而，必须认识到这种方法也有其局限性。例如，它并未考虑长期加载或环境退化的影响，这些因素可能会显著影响材料随时间的性能。此外，允许应力法主要适用于弹性材料，这意味着它在处理在去除负载后能恢复原形的材料时最有效。在材料表现出塑性行为的情况下，工程师可能需要采用更高级的方法，如极限状态设计或荷载与抗力系数设计（LRFD），这些方法同时考虑了结构的极限强度和使用性。此外，允许应力法在不同材料中的应用也有所不同。例如，混凝土和钢材通常使用这种方法进行分析，但具体的计算和安全系数可能会有所不同。混凝土通常根据其抗压强度进行评估，而钢则根据其拉伸和压缩能力进行评估。理解这些细微差别对工程师有效应用允许应力法至关重要。总之，允许应力法作为结构工程中的基本方法，使工程师能够确保结构能够安全承受预期的负载。虽然它提供了简单性和清晰性，但工程师必须始终意识到其局限性，并在必要时应用其他方法。随着技术和材料科学的不断发展，工程设计中使用的方法也将不断演变，但允许应力法可能仍将是安全有效结构设计的关键组成部分。