designing repairable buildings · slotted beam joints. floor slab. link slab cracking...
TRANSCRIPT
![Page 1: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/1.jpg)
Designing Repairable Buildings
Rick Henry
![Page 2: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/2.jpg)
• Repairability of (concrete) buildings
2010/2011 Canterbury
![Page 3: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/3.jpg)
• Improving guidance on residual capacity and repair• Damaged beams & walls can be repaired (structural perspective)
Conventional RC Components
Elwood et al.
![Page 4: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/4.jpg)
Uncertainty in Post-EQ Assessments
Damage Ratio0 10% 30%20% 40% 60%50% 70% 80% 100%90%
Engi
nee
r h
ired
by
insu
ran
ce c
om
pan
y
Engi
nee
r h
ired
by
bu
ildin
g o
wn
er
Uncertainty inPost-EQ Assessmentsw/o guidance
Uncertainty inPost-EQ Assessmentswith guidance
≈ repair cost ⁄ replacement cost Elwood et al.
![Page 5: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/5.jpg)
• Disruption caused by damage to precast floors (esp. hollowcore)
2016 Kaikōura
![Page 6: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/6.jpg)
• Improve assessment guidance• Validate retrofit methods• Focus on life-safety,
can’t eliminate damage
Precast Floor Research
![Page 7: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/7.jpg)
1. Structural components
2. Structural systems (more than components)
3. Entire buildings (more than structural system)
4. Clusters of buildings (more than 1 building)
5. Cities and communities (more than buildings)
Resilient or Repairable Buildings
![Page 8: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/8.jpg)
What about reducing damage?
![Page 9: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/9.jpg)
• Can protect the building from (most) damage• Not likely to be implemented in all buildings
Base Isolation
![Page 10: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/10.jpg)
Low-Damage Components
![Page 11: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/11.jpg)
• Have the innovative low-damage solutions currently being implemented sufficiently tested?
Low-Damage Buildings
![Page 12: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/12.jpg)
• 2 storeys (@ full scale)
• Post-tensioned walls
• Frames with slotted beams
• Interchangeable energy dissipating devices
• Several designs/config:
• 1% & 2% design drift
• Torsional
• No dampers
![Page 13: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/13.jpg)
D2-180%
![Page 14: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/14.jpg)
Wall Base
ULS EQ (2% design) ULS EQ (1% design) MCE EQ
![Page 15: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/15.jpg)
Slotted Beam Joints
![Page 16: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/16.jpg)
Floor Slab
![Page 17: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/17.jpg)
Link Slab Cracking
![Page 18: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/18.jpg)
• Conventional RC components are repairable from a structural perspective
• Hollowcore floor damage difficult to repair
• Repairability needs to be achieved for entire building
• Low-damage systems offer a range of alternatives but need to be properly validated
Summary
![Page 19: Designing Repairable Buildings · Slotted Beam Joints. Floor Slab. Link Slab Cracking •Conventional RC components are repairable from a structural perspective •Hollowcore floor](https://reader030.vdocuments.net/reader030/viewer/2022040813/5e585450a89f68282772d13b/html5/thumbnails/19.jpg)
Thank you