Fire Resistant Design Criteria of Tall Steel Building Structures

Y C WangManchester Centre for Civil and

Construction Engineering, UMIST, UK

Design Options

• To prevent structural collapse• To design for global structural damage• To design for local structural damage• To prevent any structural damage

Acceptable Damage

Global Damage

A B CA B C D

D

A B C DA B C D

Local Damage

Design for No Structural Damage

• Prevent column failure• Limit residual deflections of beams

Risk Assessment

Building important?Complete Collapse

No

Yes

Design for no collapse

Improve ductility to prolong time of safe occupant escape

Global damage acceptable?

Local damage

No

No damage

Yes

Global damageYes

Repair difficult and expensive?

No