university of california, irvine
DESCRIPTION
Task 1.4.4 Behavior of Shear Walls. Gerard C. Pardoen University of California, Irvine. University of California, Irvine. Research Plan. 1.1.1 Single-Family House. 1.1.2 Multi-Story Apartment Building. 1.1.3 Simplified Model. University of California, Irvine. Task 1.4.4 – Shear Walls. - PowerPoint PPT PresentationTRANSCRIPT
University of California, Irvine
Task 1.4.4Behavior of Shear Walls
Gerard C. Pardoen
University of California, Irvine
University of California, Irvine
1.1.1 Single-Family House 1.1.2 Multi-Story Apartment Building
1.1.3 Simplified Model
1.3.1 Rate of Loading+ Loading Protocol Effects
1.4.1 Anchorage 1.4.2 Diaphragms
1.4.6 Wall FinishMaterials
1.4.7 InnovativeSystems
1.4.8 Connections
1.5.1 Analysis Software 1.5.2 Demand Aspects 1.5.3 Reliability Analysis
1.4.3 Cripple Walls 1.4.4 Shear Walls 1.4.5 Soft/Weak Stories
1.3.2 Testing Protocols 1.3.3 Dynamic Characteristics
1.2 International Benchmark
Research Plan
University of California, Irvine
Task 1.4.4 – Shear Walls* Objectives:
- Improve understanding of the cyclic behavior of full-scale shear walls of different construction- Expand upon City of Los Angeles project at UC-Irvine- Correlate with Task 1.1.1 Shake Table Tests
* 46 samples: 16’ x 8’, 6.5’ x 8’, 3’ x 8’* Two large scale multi-story wall tests - 16’ x 17’* Main test variables: - Gravity loads, nail types, grade of framing lumber, staples, hold-downs, aspect ratio
University of California, Irvine
Exterior, Interior Shear Walls
West Wall, Line 7 East Wall, Line 1 North Wall, Line A South Wall, Line C
Interior Wall, Line 3 Interior Wall, Line 5
University of California, Irvine
Shear Wall Test MatrixGroup Configuration Characteristics Protocol Samples Comments
1 16'x8' fully sheathed, no openings monotonic 1
2 16'x8' West Wall, Line 7, 1st floor monotonic 1
3 16'x8' East Wall, Line 1, 1st floor monotonic 1
4 16'x8' fully sheathed, no openings CUREE 25 16'x8' fully sheathed, no openings "slow" shake 2 Phase 5
6 16'x8' West Wall, Line 7, 1st floor CUREE 27 16'x8' West Wall, Line 7, 1st floor "slow" shake 2 Phase 9
8 16'x8' East Wall, Line 1, 1st floor CUREE 29 16'x8' East Wall, Line 1, 1st floor "slow" shake 2 Phase 9
10 16'x8' East Wall, Line 1, 1st floor-with common nails CUREE 2 basic is box nail11 16'x8' fully sheathed with staples CUREE 2
12 16'x8' East Wall, Line 1, 1st floor-OSB, stucco, gyp CUREE 2 stucco, OSB ext, gyp int13 16'x8' West Wall, Line 7, 1st floor-OSB, stucco, gyp CUREE 2
14 16'x8' East Wall, Line 1, 1st floor-stucco, gyp CUREE 2 stucco ext, gyp int15 16'x8' West Wall, Line 7, 1st floor-stucco, gyp CUREE 2
16 16'x8' East Wall, Line 1, 1st floor-stucco only CUREE 2 stucco ext17 16'x8' West Wall, Line 7, 1st floor-stucco only CUREE 2
18 16'x8' East Wall, Line 1, 1st floor-gyp only CUREE 2 gyp int19 16'x8' West Wall, Line 7, 1st floor-gyp only CUREE 2
20 16'x8' East Wall, Line 1, 1st floor-OSB, stucco CUREE 2 stucco, OSB ext 21 16'x8' West Wall, Line 7, 1st floor-OSB, stucco CUREE 2
22 16'x8' East Wall, Line 1, 1st floor-OSB, gyp CUREE 2 OSB ext, gyp int23 16'x8' West Wall, Line 7, 1st floor-OSB, gyp CUREE 2
24 16'x8' West Wall, Line 7, 1st floor-OSB, other finish, gyp CUREE 2 OSB, finish ext, gyp int25 16'x8' West Wall, Line 7, 1st floor-other finish CUREE 2 finish ext
26 16'x8' West Wall, Line 7, 1st floor-use standard HD, 3/4" loose CUREE 227 16'x17' fully sheathed, no openings CUREE 1
28 16'x17' fully sheathed, door and window openings CUREE 1
CUREE-Caltech Woodframe Project-Task 1.4.4
University of California, Irvine
16’ x 8’ OSB Shear Wall
University of California, Irvine
6.5’ x 8’ OSB Shear Walls
University of California, Irvine
3’ x 8’ OSB Shear Walls
University of California, Irvine
16’ x 8’ Stucco/GWB Shear Wall
University of California, Irvine
Two-Story Shear Wall
University of California, Irvine
Two-Story Shear Wall w/ Openings
University of California, Irvine
CUREe Test ProtocolProposed CUREe Test Protocol
Ordinary Ground Motions
-1.5
-1.0
-0.5
0.0
0.5
1.0
1.5
0 10 20 30 40 50 60 70 80
Number of Half Cycles
Ratio of Maximum Displacement
..
University of California, Irvine
CUREE Shearwall Project 1.4.4Monotonic Test - 16'x8' Fully-Sheathed Shearwall
0
2000
4000
6000
8000
10000
12000
14000
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Horizontal Displacement (in)
Horizontal Load (lbs)
11,440 lbs
9,150 lbs
3.62”
= 2.17” = 0.6*3.62”
University of California, Irvine
University of California, Irvine
CUREE Shearwall Project 1.4.4Monotonic Test - 16'x8' Fully-Sheathed Shearwall
0
2000
4000
6000
8000
10000
12000
14000
0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0
Horizontal Displacement (in)
Horizontal Load (lbs)
University of California, Irvine
University of California, Irvine
CUREE Shearwall Project 1.4.4Monotonic Test - 16'x8' Shearwall - Front Door
0
2000
4000
6000
8000
10000
12000
14000
0 1 2 3 4 5 6
Horizontal Displacement (in)
Horizontal Load (lbs)
University of California, Irvine
University of California, Irvine
CUREE Shearwall Project 1.4.4Monotonic Test - 16'x8' Shearwall - Garage Door
0
2000
4000
6000
8000
10000
12000
0 1 2 3 4 5 6 7 8
Horizontal Displacement (in)
Horizontal Load (lbs)
University of California, Irvine
Monotonic Test ResultsCUREE-Caltech Woodframe Project
Task 1.4.4 Monotonic Tests
0
2000
4000
6000
8000
10000
12000
14000
0 1 2 3 4 5 6 7 8
Horizontal Displacement (in)
Horizontal Force (lbs)
No openings
Garage door
Front door
University of California, Irvine
Project Status
* Update Preliminary Literature Review - 100+ reports, papers categorized in 9 sections
* Revised Test Schedule - Monotonic tests: December ‘00
Three representative 16’ x 8’ Task 1.4.4 configurations - Cyclic tests: January - May
* Review Instrumentation Layout - Record forces/deformations consistent with shake table tests