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CUREe Woodframe ProjectCUREe Woodframe ProjectTask 1.4.1 - Anchorage of Woodframe BuildingsTask 1.4.1 - Anchorage of Woodframe Buildings
Hillside Connection Hillside Connection TestsTestsMeeting, January 12-13, 2001Meeting, January 12-13, 2001
Principal InvestigatorPrincipal Investigator
Yan XIAO, Ph.D., PE.Yan XIAO, Ph.D., PE.
Researchers: Dr. L. XieResearchers: Dr. L. Xie
University of Southern CaliforniaUniversity of Southern California
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Program MeetingProgram Meeting
Project Meeting at USC on May 16, 2000 Nicolino G. Delli Quadri (LA DBS) Steve Pryor (Simpson Strong-Tie) Jim Russell Vida Tarasyoly (Rubicon) Chia-Ming Uang (UCSD) Yan Xiao (USC) Li Xie (USC)
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Cyclic Testing of AnchorsCyclic Testing of Anchors
To experimentally define the hysteric To experimentally define the hysteric characteristics of primary and characteristics of primary and secondary anchorssecondary anchors
To identify the failure modesTo identify the failure modes To develop and calibrate analytical To develop and calibrate analytical
models for base level diaphragm design models for base level diaphragm design of hillside buildingsof hillside buildings
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Test Matrix Test Matrix
Capacity by Manufacturer
Specimen AnchorJoist/
CollectorAllowableCapacityQ (kips)
EstimatedCapacityQ0 (kips)
PA-1 HD15 6x6 15.305 34.5
PrimaryAnchorsPA-2 PHD8 6x6 6.730 15.2
SA-1 HD5 (2)2x8 3.705 8.4
SA-2 PHD5 (2)2x8 4.685 10.6Secondary
Anchors
SA-3 HTT22 (2)2x8 5.250 9.9
Note: 1. All specimens use non-symmetric (single anchor) connection 2. Q0 = k Q / 1.33, where k = 2.5 for HTT22, 3.0 for other anchors.
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Specimen: Primary Specimen: Primary Anchor, HD15Anchor, HD15
SPECIMEN PA-1 : PRIMARY ANCHOR HD15
NOTES:
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Specimen:Specimen: Secandary Secandary Anchor, HD5Anchor, HD5
SPECIMEN SA-1 : SECONDARY ANCHOR HD5
NOTES:
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Test SetupTest Setup
3 ton
2x3 ton Monorail Crane System
Frame
Reaction
Anchor HD5to be tested
Specimen SA-1 (4'x6')
Linear Potentiometers
Actuators+load cells
Actuators+load cells
for loadingAnchors
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InstrumentationInstrumentation
SPECIMEN SA-1 : STRAIN GAUGE AT PLYWOOD AND JOISTS
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Loading ProgramLoading ProgramLOADING PROCEDURE
1.0Q0 , 1.0D0
0.7Q0
0.5Q0
1.5D0
2.0D0
3.0D0
-1.0Q0
FORCE CONTROL
DISPLACEMENTCONTROL
-0.5Q0
-0.7Q0
Q0 = Capacity by Manufacturer (without safety factor);D0 = Displacement at Q0
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Preliminary Test Results: Preliminary Test Results: PHD5PHD5
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Preliminary Test Results: Preliminary Test Results: HD5HD5
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Anchor BracketsAnchor Brackets
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Hysteresis Loops: PHD5Hysteresis Loops: PHD5
-15
-10
-5
0
5
10
15
20
-20 0 20 40 60 80 100 120 140 160
Displacement (x10 -2 in)
Force (kips)
test
allowable capacity
estimated capacity
PullPush
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Hysteresis Loops: PHD5Hysteresis Loops: PHD5
-15
-10
-5
0
5
10
15
-20 0 20 40 60 80 100 120 140 160
Displacement (x10-2 in)
Force (kips)
test
allowable capacity
estimated capacity
PullPush