Progressive Collapse Due to Column Removal in ... - ERA
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Progressive Collapse Due to Column Removal in Gravity Frame Structures Kyra Jubinville-WISEST Student, Safa Masajedian, Dr. Robert Driver 1 WISEST Student, 2 Civil Engineering, University of Alberta 3 Civil Engineering, University of Alberta Introduction Methods • Going to build experiment in the lab that is 8.7m X 8.7m X 3m • Ran several finite element models to see how much the length of overhang should be so results are reliable • Had to be comparable to a 2 X 2 bay model • Sandbags used to represent everyday load and an actuator to apply a load that would represent the weight of the above floors • Sand bags will be put in Bagster Bags then secured using tie wraps • Compare results from ABAQUS model and the lab experiment • Current design criteria for progressive collapse is Catenary Action and Flexural Action Strong and Weak Axis • Using ABAQUS, I proved that there is a strong and weak axis on a beam. This can be compared to a beam that will be used in the progressive collapse experiment. • The strong axis will have less deformation than the weak axis • Strong axis • Weak axis Conclusions • This research shows that a gravity frame structure has robustness but will eventually collapse • This also proves that what was originally understood about gravity frame structures is incorrect • But, there will be enough time to evacuate the building so there will be less fatalities and injuries • Having this information will lead to a safer society • With this new information, new design criteria can be made so it will be easier to keep the failure local rather than a global failure Results • 1.9 metres in length of overhang compared the best to the 2 X 2 bay’s results and is going to be used in the experiment • Shear tab failed, which caused more rotation to occur • What the 1.9 overhang model looked like when it was finished • Overall displacement is 1.6 metres References and Acknowledgements • Progressive Collapse Resistance of Composite Steel Frame Structures under Corner Column Removal By Safa S. Masajedian, and Robert G. Driver (2016) • Computational Simulation of gravity-Induced Progressive Collapse of Steel-Frame Buildings: Current Trends ans Future Research Needs By Sherif El-Tawil, Honghao Li, and Sashi Kunnath (2013) • I would like to give a huge thanks to Syncrude Canada and for all the Steel Centre members. Without them I wouldn’t have been able to have the amazing experience that I did. • Purpose of the study is to test the robustness of gravity frame buildings when a column is removed • Progressive collapse is when a structural member is damaged or fails, and then collapses. The remaining structural members might not be able to support the increased amount of load, and collapse as well • Example is the Ronan Point building in London, England • How can we keep failure localized so a proportion of the building doesn’t fail as well? -2.E+05 -1.E+05 -5.E+04 0.E+00 5.E+04 1.E+05 2.E+05 2.E+05 3.E+05 0 0.01 0.02 0.03 Horizontal Loads (N) Beam Rotation (radians) "2 X 2 setup "1.9 m" overhang
Transcript of Progressive Collapse Due to Column Removal in ... - ERA
Progressive Collapse Due to Column Removal in Gravity Frame StructuresKyra Jubinville-WISEST Student, Safa Masajedian, Dr. Robert Driver1WISEST Student, 2Civil Engineering, University of Alberta 3Civil Engineering, University of Alberta
Introduction Methods
• Going to build experiment in the lab that
is 8.7m X 8.7m X 3m
• Ran several finite element models to see
how much the length of overhang should
be so results are reliable
• Had to be comparable to a 2 X 2 bay
model
• Sandbags used to represent everyday
load and an actuator to apply a load that
would represent the weight of the above
floors
• Sand bags will be put in Bagster Bags
then secured using tie wraps
• Compare results from ABAQUS model
and the lab experiment
• Current design criteria for progressive
collapse is Catenary Action and Flexural
Action
Strong and Weak Axis
• Using ABAQUS, I proved that there is a
strong and weak axis on a beam. This can
be compared to a beam that will be used
in the progressive collapse experiment.
• The strong axis will have less deformation
than the weak axis
• Strong axis
• Weak axis
Conclusions
• This research shows that a gravity frame
structure has robustness but will
eventually collapse
• This also proves that what was originally
understood about gravity frame structures
is incorrect
• But, there will be enough time to
evacuate the building so there will be less
fatalities and injuries
• Having this information will lead to a safer
society
• With this new information, new design
criteria can be made so it will be easier to
keep the failure local rather than a global
failure
Results
• 1.9 metres in length of overhang
compared the best to the 2 X 2 bay’s
results and is going to be used in the
experiment
• Shear tab failed, which caused more
rotation to occur
• What the 1.9 overhang model looked like
when it was finished
• Overall displacement is 1.6 metres
References and Acknowledgements
• Progressive Collapse Resistance of Composite
Steel Frame Structures under Corner Column
Removal By Safa S. Masajedian, and Robert
G. Driver (2016)
• Computational Simulation of gravity-Induced
Progressive Collapse of Steel-Frame Buildings:
Current Trends ans Future Research Needs By
Sherif El-Tawil, Honghao Li, and Sashi Kunnath
(2013)
• I would like to give a huge thanks to Syncrude
Canada and for all the Steel Centre members.
Without them I wouldn’t have been able to have
the amazing experience that I did.
• Purpose of the study is to test the
robustness of gravity frame buildings when a
column is removed
• Progressive collapse is when a structural
member is damaged or fails, and then
collapses. The remaining structural
members might not be able to support the
increased amount of load, and collapse as
well
• Example is the Ronan Point building in
London, England
• How can we keep failure localized so a
proportion of the building doesn’t fail as
well?
-2.E+05
-1.E+05
-5.E+04
0.E+00
5.E+04
1.E+05
2.E+05
2.E+05
3.E+05
0 0.01 0.02 0.03
Ho
rizo
nta
l Lo
ads
(N)
Beam Rotation (radians)
"2 X 2 setup
"1.9 m" overhang
