V2EX ultimate limit state

Ultimate Limit State

定义 Definition

Ultimate limit state(ULS):土木/结构工程中的术语,指结构或构件达到承载能力极限的状态;一旦超过该状态,可能发生破坏、失稳、断裂、压溃等,导致丧失安全承载能力。常与 serviceability limit state(正常使用极限状态,SLS)相对。

例句 Examples

The beam must be checked at the ultimate limit state.
梁必须按承载能力极限状态进行验算。

Under the design load combination, the column remained below the ultimate limit state, providing an adequate safety margin against buckling.
在设计荷载组合下,该柱未达到承载能力极限状态,从而对屈曲保持了足够的安全裕度。

发音 Pronunciation (IPA)

/ltmt lmt stet/

词源 Etymology

该短语由三部分构成:ultimate(“最终的、极限的”)+ limit(“界限、限度”)+ state(“状态”)。在结构可靠度与极限状态设计(Limit State Design)体系中,“ultimate”强调与安全相关的破坏界限,用于区分与变形、裂缝、振动等使用性能相关的正常使用极限状态(SLS)

相关词 Related Words

文献与标准中的常见出处 Notable Works

  • EN 1990: Eurocode Basis of Structural Design(欧标EN 1990,确立ULS/SLS框架)
  • EN 1992-1-1: Eurocode 2 Design of Concrete Structures(混凝土结构ULS验算条文)
  • EN 1993-1-1: Eurocode 3 Design of Steel Structures(钢结构ULS验算条文)
  • BS 8110: Structural use of concrete(英国旧标准,广泛使用ULS术语)
  • ISO 2394: General principles on reliability for structures(结构可靠度通用原则,涉及极限状态概念)
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