Transcript gr_5_kemper_arena_presentation[1].pptx

Group 5

History

Structure

Failure Scenario

Reasons of Failure

Engineering Mistakes

Built in 1973 in Kansas City

Multipurpose Stadium
 Ice shows, conferences, basketball, soccer games...
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Capacity of 17,000
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Contemporary Design
 Received an award in 1976 from AIA
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Cost $23.3 million to build
Steel trusses supported RC roof
Steel trusses hung
from three portals
95m
100m
25m
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4th June 1979
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One in ten year storm
○ 120 km/h winds
○ 10 cm of rain per hour

Roof collapsed

Rapid air pressure increase blew out walls
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Portals remained undamaged
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0 victim
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Roof used as temporary reservoir during
storms
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Accumulation of water due to
inadequate drainage
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Ponding of the roof
 Roof began to sag and more water accumulated
 Increase of load supported by the roof
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Bolts subjected to high
rate of oscillations
since erection of Arena
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Fatigue of Bolts
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Bolts failed in one
hanger due to load
increase on the roof
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Domino effect caused
others hangers to fail
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Drainage system :
○ Use of 8 drains of diameter 12cm
○ 55 were required according to local codes

What should have be done :
○ Respect of Building Standards

Bolts :
○ Use of A490 bolts
(can only maintain tensile strength for static
conditions)
○ Failed at 1/3 of Design Capacity
due to fatigue

What should have be done :
○ Design of bolts under dynamic conditions

Domino effect :
○ Lack of redundancy in the hangers

What should have be done :
○ Better load distribution
Thank
You!
Group 5
Michael Harte
Emma-Jane Heneghan
Matthieu Huot
Kiara Ryan
Angharad Sweeney