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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