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PRJ-3320 | Multiscale investigation of load transfer directionality of bioinspired surfaces under monotonic and cyclic loading
PI
Project Type
Experimental
Natural Hazard Type(s)
Other
Facilities
Keywords
Deep foundations, interface, bioinspired
|
Description:
This project addresses the effects of soil-structure behavior at the interface when the structural element is asymmetrically structured. This texturing can be applied both to planar applications, such as geosynthetics, or pile shafts. The texturing induces a directional dependence in terms of interface friction angle, which leads to differences in shear resistances which may be outside the bounds expected from many many formulations of pile shaft resistance.
Experiment | Centrifuge monotonic pullout and displacement controller cyclic tests on bioinspired and reference piles
Cite This Data:
O'Hara, K., A. Martinez (2023). "Centrifuge monotonic pullout and displacement controller cyclic tests on bioinspired and reference piles", in Multiscale investigation of load transfer directionality of bioinspired surfaces under monotonic and cyclic loading. DesignSafe-CI. https://doi.org/10.17603/ds2-3148-wp47
View Data
Author(s)
;
Facility
Center for Geotechnical Modeling - University of California, Davis
Experiment Type
Centrifuge
Equipment Type
9m Radius Dynamic Geotechnical Centrifuge
Date of Experiment
2020-10-12 ― 2020-12-22
Date Published
2023-06-28
DOI
10.17603/ds2-3148-wp47
License
Open Data Commons Attribution
Description:
The tests were conducted on 5 internally instrumented piles with directionally dependent or reference shaft geometries in order to investigate the differences in load transfer during installation and pullout . In addition, displacement controlled cycles were applied, followed by a second pullout portion in order to investigate the post cyclic capacity of each pile. The experiment showed clear dependency of load transfer based on shaft texture, and the changes in load distribution between installation and pullout. The data provided includes the processed strain gauge measurements from each pile for each portion of loading (i.e. installation, pullout, cyclic, and post cyclic pullout), and can be used for any application where pile load measurements are of interest for the given installation depths and soil state.
Model Configuration | Read me
Description:
Basic summary of test details, including naming conventions, soil conditions, and centrifugal acceleration
File Name
Sensor Information | Benders
Description:
Six sets of benders were run. The pairs were grouped in sets of 3. Each set was placed radially away from a pile push location, noted in the file, and waveforms were recorded both before pile installation, and immediately following pile installation.
File Name
Bender Element
Model Configuration | Layout
Description:
Layout of model with test locations, with cross section of pile with gauge locations and dimensions
File Name
Sensor Information | CPT Load
Description:
Calibration factors for CPT
File Name
Event | CPT
Description:
5, 10mm diameter, miniature CPTs were pushed in order to assess model variability and estimate the pile installation loads. CPTs were conducted at 40g
File Name
Cone Penetrometer
Cone Penetrometer
Sensor Information | DI-RP072
Description:
Calibration factors from gauges 1 through 6, pile DI-RP072
File Name
Event | DI-RP072 pile load test
Description:
Pile load tests were conducted on all piles. Piles were installed to a depth of 250mm or 350mm (model scale) at a centrifugal acceleration of 30g. Each test consisted of installation, pullout, displacement controlled cycles, and a final pullout.
File Name
Sensor Information | Rough pile
Description:
Calibration factors from gauges 1 through 6, pile RI-DP030
File Name
Event | Rough pile load test
Description:
Pile load tests were conducted on all piles. Piles were installed to a depth of 250mm or 350mm (model scale) at a centrifugal acceleration of 30g. Each test consisted of installation, pullout, displacement controlled cycles, and a final pullout.
File Name
Sensor Information | RI-DP030
Description:
Calibration factors from gauges 1 through 6, pile RI-DP030
File Name
Event | RI-DP030 pile load test
Description:
Pile load tests were conducted on all piles. Piles were installed to a depth of 250mm or 350mm (model scale) at a centrifugal acceleration of 30g. Each test consisted of installation, pullout, displacement controlled cycles, and a final pullout.
File Name
Sensor Information | DI-RP030
Description:
Calibration factors from gauges 1 through 6, pile DI-RP030
File Name
Event | DI-RP030 pile load test
Description:
Pile load tests were conducted on all piles. Piles were installed to a depth of 250mm or 350mm (model scale) at a centrifugal acceleration of 30g. Each test consisted of installation, pullout, displacement controlled cycles, and a final pullout.
File Name
Sensor Information | Smooth pile
Description:
Calibration factors from gauges 1 through 6, smooth pile
File Name
Event | Smooth pile load test
Description:
Pile load tests were conducted on all piles. Piles were installed to a depth of 250mm or 350mm (model scale) at a centrifugal acceleration of 30g. Each test consisted of installation, pullout, displacement controlled cycles, and a final pullout.
Martinez, A., K. O'Hara (2023). "KBO02: Load controlled axial cyclic testing on snakeskin-inspired pies", in Multiscale investigation of load transfer directionality of bioinspired surfaces under monotonic and cyclic loading. DesignSafe-CI. https://doi.org/10.17603/ds2-8aac-gq61
View Data
Author(s)
;
Facility
Center for Geotechnical Modeling - University of California, Davis
Experiment Type
Centrifuge
Equipment Type
9m Radius Dynamic Geotechnical Centrifuge
Date of Experiment
2021-03-01 ― 2021-04-01
Date Published
2023-06-28
DOI
10.17603/ds2-8aac-gq61
License
Open Data Commons Attribution
Description:
4 piles of various shaft geometries were installed in-flight under 30g centrifugal acceleration, and then subjected to load controlled cycles, with mean and average cyclic loads. Each pile had internal strain gauges and a load cell at the pile head The strain gauge data may be used to evaluate load distribution along the pile shaft throughout cycling. In addition, 4 miniature CPT soundings were performed to assess model variability.
Model Configuration | KBO02 Model configuration and information
Description:
(N/A)
File Name
Sensor Information | CPT Load
Description:
Calibration factors for CPT
File Name
Event | CPT
Description:
5, 10mm diameter, miniature CPTs were pushed in order to assess model variability and estimate the pile installation loads. CPTs were conducted at 40g
File Name
Sensor Information | Internally strain gauged pile
