Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile...
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![Page 1: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/1.jpg)
Structural Engineering and Earthquake Simulation Laboratory
1-g Pile Tests – Brief Plans1-g Pile Tests – Brief Plans
R. Bethapudi, S. Thevanayagam, UB
PI: R. Dobry, co-PI’s: A. Elgamal, S. Thevanayagam, T. Abdoun, M. ZeghalUB-NEES Lab: A. Reinhorn, M. Pitman, J. Hanley, SEESL-StaffTulane: Usama El ShamyStudents & Staff: UB (N. Ecemis, Raghudeep B.) and RPI (J. Ubilla, M. Gonzalez, V. Bennett, C. Medina, Hassan, Inthuorn)
![Page 2: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/2.jpg)
Structural Engineering and Earthquake Simulation Laboratory
Test Plans Test Plans
Single PileSingle Pile High-EI Pile (Test 1A) High-EI Pile (Test 1A) –2Hz, amax=0.3g –2Hz, amax=0.3g Low-EI Pile (Test 1B) Low-EI Pile (Test 1B) – 2Hz, amax=0.3g – 2Hz, amax=0.3g
Group PileGroup Pile High-EI Pile (Test 2A) High-EI Pile (Test 2A) –2Hz, amax=0.3g –2Hz, amax=0.3g Low-EI Pile (Test 2B) Low-EI Pile (Test 2B) – 2Hz, amax=0.3g – 2Hz, amax=0.3g
![Page 3: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/3.jpg)
Structural Engineering and Earthquake Simulation Laboratory
6.2 m
SECTIONAL VIEW
Shaking Frame on Strong Floor
Test 1A: High EI pileTest 1B: Low EI pile
=2 or ? deg.
F#55Sand, Dr~45%
Single Pile (Tests 1A & 1B)Single Pile (Tests 1A & 1B)
![Page 4: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/4.jpg)
Structural Engineering and Earthquake Simulation Laboratory
Instrumentation: Instrumentation: Single PileSingle Pile
![Page 5: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/5.jpg)
Structural Engineering and Earthquake Simulation Laboratory
Instrumentation – Plan ViewInstrumentation – Plan View
MEMS
VideoKrypton
Piezometer
Y-Acc (Ring)X-Acc
Strain Gauges
Pile
Y-Pot.
X-Pot.
4331717
17
6
4
1
66
Chan. Needed: 156
2D2D5D
D
3D
EAST
SOUTH
![Page 6: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/6.jpg)
Structural Engineering and Earthquake Simulation Laboratory
![Page 7: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/7.jpg)
Structural Engineering and Earthquake Simulation Laboratory
![Page 8: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/8.jpg)
Structural Engineering and Earthquake Simulation Laboratory
Group Pile (Tests 2A and 2B)Group Pile (Tests 2A and 2B)
5.0 m
2.75
m
6.2 m
SECTIONAL VIEW
PLAN
Shaking Frame on Strong Floor
Test 2A:High EI Group Pile Test 2B:Low EI Group Pile
=2 or ? deg.
F#55Sand, Dr~45%
3.35
m
5.6 m
Pile Cap
![Page 9: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/9.jpg)
Structural Engineering and Earthquake Simulation Laboratory
Instrumentation: 2x2 GroupInstrumentation: 2x2 Group
![Page 10: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/10.jpg)
Structural Engineering and Earthquake Simulation Laboratory
Pile PropertiesPile Properties
O.D. [cm] THK [cm] I.D. [cm] I [cm4] EI (KN-m2) Area [m2]Sch 40 10 27.305 0.9271 25.4508 6690.264 14049.6 1.7
Pile TypeLow EI Pile
High EI Pile
6.4 m [21 ft] long Grade 50 Steel Hollow Pipe
E = 210 GPa [29000 ksi]
O.D. [cm] THK [cm] I.D. [cm] I [cm4] EI (KN-m2)Sch 40 12 32.385 0.9525 30.5 11626.8 24416.3
Pile Type
![Page 11: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/11.jpg)
Structural Engineering and Earthquake Simulation Laboratory
PILE
Pile - Base Plate ConnectionPile - Base Plate Connection
![Page 12: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/12.jpg)
Structural Engineering and Earthquake Simulation Laboratory
Instrumentation Summary for Single Instrumentation Summary for Single and Group Pilesand Group Piles
Sensors Total Need Available
Strain Gauges 111 66MEMS 96 ?
Piezometers 42 39X-Acc(Ring) 17 25Y-Acc(Ring) 17 25
X-Potentiometers 17 20Y-Potentiometers 14 20
Video 4 4K-270 1 1
Chan. Needed: 218
Sensors Total Need Available
Strain Gauges 66 66
MEMS 96 ?Piezometers 33 20X-Acc(Ring) 17 25Y-Acc(Ring) 17 25
X-Potentiometers 17 20
Y-Potentiometers 6 20Video 4 4K-270 1 1
Chan. Needed: 156
Single PileSingle Pile Group PileGroup Pile
Note: Potentiometer numbers will be increased every ring (24) & video targets will be installed
![Page 13: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/13.jpg)
Structural Engineering and Earthquake Simulation Laboratory
DiscussionDiscussion1. Slope Angle - 2o or other?
2. Ground Motion – Same as SG-1?
3. Soil Density – Same as SG-1?
4. Pile Stiffness - TBA
-0.4
-0.3
-0.2
-0.1
0.0
0.1
0.2
0.3
0.4
0 10 20 30Time (s)
Acc
eler
atio
n (g
)
a1
a2
a3
a4
umax=0.75’’
f=2 Hz
a1=0.01 g (5 sec)
a2=0.05 g (10 sec)
a3=0.15 g (10 sec)
a4=0.3 g (10 sec)
Ground Motion - SG-1
![Page 14: Structural Engineering and Earthquake Simulation Laboratory 1-g Pile Tests – Brief Plans 1-g Pile Tests – Brief Plans R. Bethapudi, S. Thevanayagam, UB.](https://reader035.fdocuments.net/reader035/viewer/2022062806/5697bf7a1a28abf838c831f8/html5/thumbnails/14.jpg)
Structural Engineering and Earthquake Simulation Laboratory
Open for Discussion by All Open for Discussion by All ResearchersResearchers