Chapter
Jun 20, 2012
Static and Dynamic Lateral Load Tests on a Pile Cap with Partial Gravel Backfill
Authors: Kyle M. Rollins [email protected], Ku Hyun Kwon [email protected], and Travis M. Gerber [email protected]Author Affiliations
Publication: Geotechnical Earthquake Engineering and Soil Dynamics IV
Abstract
Lateral pile cap tests were performed on a pile cap with two backfills to evaluate its static and dynamic behavior. In one case the backfill was loose silty sand while in the other case, a 0.91-m wide zone of gravel was compacted between the pile, cap and the loose silty sand. The relatively thin dense gravel zone increased the lateral resistance by 75 to 150% relative to the loose silty sand backfill. The dense gravel zone also increase lateral resistance to 59% of the resistance that would be provided by a backfill entirely composed of dense gravel. The dynamic stiffness for the pile cap with the gravel zone decreased about 10% after 15 cycles of loading, while the damping ratio remained relatively constant with cycling. Stiffness increased by about 10% at higher deflections, while the damping ratio decreased from an initial value 0.30 to around 0.26 at higher deflections.
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Copyright
© 2008 American Society of Civil Engineers.
History
Published online: Jun 20, 2012
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ASCE Technical Topics:
- Backfills
- Construction engineering
- Construction methods
- Continuum mechanics
- Dynamic loads
- Dynamic tests
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Excavation
- Foundations
- Geotechnical engineering
- Gravels
- Infrastructure
- Laboratory tests
- Lateral loads
- Load tests
- Pavements
- Pile foundations
- Pile tests
- Solid mechanics
- Static loads
- Statics (mechanics)
- Structural dynamics
- Tests (by type)
- Transportation engineering
Authors
Affiliations
Prof., Civ. & Env. Engrg. Dept., Brigham Young Univ. 368 CB, Provo, UT 84602. E-mail: [email protected]
Staff Engr., GeoEngineers, Inc., 523E 2nd Ave, Spokane, WA 99202. E-mail: [email protected]
Asst. Prof., Civ. & Env. Engrg. Dept., Brigham Young University, 368 CB, Provo, UT 84602. E-mail: [email protected]
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