What is the ultimate limit state of load-bearing capacity for steel structures?


Published Time:

2025-04-30

The ultimate limit state of a steel structure refers to the state where the structure or component reaches its maximum load-carrying capacity or fails.

The ultimate limit state of a steel structure refers to the state where the structure or component reaches its maximum load-carrying capacity or fails. Specifically, when a steel structure reaches its maximum load-bearing capacity, it may fail; this state is known as the ultimate limit state.

Specific manifestations of the ultimate limit state
Structure reaches maximum load-carrying capacity: When a steel structure is subjected to external loads, and the load it bears reaches the design limit, the structure will fail.
Deformation unsuitable for continued load-bearing: In addition to reaching the maximum load-carrying capacity, steel structures may also exhibit deformations unsuitable for continued load-bearing, such as overturning, strength failure, fatigue failure, and loss of stability.

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