Load-Sharing Behavior of Caisson Foundations in Layered Soil under Seismic Conditions
Publication: International Journal of Geomechanics
Volume 23, Issue 6
Abstract
Caissons are rigid foundation systems with huge mass that support a large variety of load combinations. Most studies ignore the resistance provided by the periphery of a caisson in providing resistance to applied external loading. In this study, the variation of resistive stresses generated on the base and sides of a caisson under various loading, interface, and seismic conditions, obtained from numerical analysis, is explored using finite-element method–based computer program ABAQUS. The shear forces and resistive moments thus generated have been studied to identify the resistive forces required for stability for different input parameters. The percentage of resisting moment shared by the caisson sides (lateral soil pressure, horizontal and vertical skin friction) has then been compared with that due to the caisson base (base reaction and base friction). Empirical correlation has been obtained using multiple linear regression analysis for the load shared by the caisson sides. It is observed that, with an increase in the horizontal and vertical seismic acceleration coefficients, the percentage of resisting moment contributed by the caisson sides increases.
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Information & Authors
Information
Published In
International Journal of Geomechanics
Volume 23 • Issue 6 • June 2023
Copyright
© 2023 American Society of Civil Engineers.
History
Received: Jul 11, 2022
Accepted: Dec 20, 2022
Published online: Mar 20, 2023
Published in print: Jun 1, 2023
Discussion open until: Aug 20, 2023
ASCE Technical Topics:
- Caissons
- Continuum mechanics
- Design (by type)
- Dynamic loads
- Dynamics (solid mechanics)
- Engineering fundamentals
- Engineering mechanics
- Finite element method
- Foundations
- Geomechanics
- Geotechnical engineering
- Load combinations
- Load factors
- Methodology (by type)
- Moment (mechanics)
- Numerical methods
- Seismic loads
- Seismic tests
- Soil mechanics
- Soil properties
- Solid mechanics
- Statics (mechanics)
- Structural design
- Structural dynamics
- Tests (by type)
Authors
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