What is the ultimate capacity of steel structures?

Answer:

When the structural or structural components appear in the following states, they shall be considered to exceed the limit of bearing capacity:1) a part of an entire structure or structure that is unbalanced as a rigid body (such as overturning);2) structural members or connections that are damaged by excessive material strength (including fatigue damage) or are not suitable for continued load due to excessive deformation;3) the structure is transformed into a mobile system;4) loss of stability (e.g. buckling) of structural or structural members;5) the foundation loses its carrying capacity and destroys (e.g. instability).

I. The ultimate bearing capacity of steel structure means failure due to fatigue.Two 、 the ultimate limit of bearing capacity is the state that has been destroyed and can not be used. The serviceability limit state is also barely usedThree, the structure or component to the maximum carrying capacity, or reach the limit state of deformation which is not suitable for continued load.

A condition in which a structure or component reaches a specified limit for normal use or durability, referred to as the serviceability limitSuch as (1) affecting the normal use or appearance of deformation;(2) local damage (including cracks) that affects normal use or durability;(3) vibration affecting normal use;(4) other specific conditions that affect normal use;