Method of Rigorous Characteristics for Seismic Bearing Capacity of Strip Footings Placed Adjacent to Homogeneous Soil Slopes
Publication: International Journal of Geomechanics
Volume 22, Issue 10
Abstract
Most studies try to establish a stress field and a compatible velocity field simultaneously to evaluate the seismic bearing capacity of strip footings placed adjacent to homogeneous soil slopes. However, the coupling of stress and velocity fields has not been addressed yet. In this study, the method of rigorous characteristics and the pseudo-dynamic approach are incorporated to resolve the issue. The failure mechanism is represented by the statically and kinematically admissible slip line field, and then the rigorous solution of the seismic bearing capacity can be achieved automatically without assuming any predefined slip surface. The results indicate that the seismic excitation leads to a remarkable decrease in the bearing capacity, especially for the effects of the initial phase difference and the soil amplification factor. Besides, the variation of the seismic failure mode is notably different from that under the static state. The seismic inertial force increases the possibility of the sliding failure, and consequently, the restraint effect of strip footings on the seismic failure mechanism diminishes.
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Acknowledgments
This work was financially supported by the National Natural Science Foundation of China (Grant Nos. 51979128 and 51890911), the National Key Research and Development Program of China (Grant No. 2019YFC0312304), and the Hainan Research Institute of China Engineering Science and Technology Development Strategy (Grant No. 21-HN-ZD-02-5).
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© 2022 American Society of Civil Engineers.
History
Received: Oct 19, 2021
Accepted: Apr 25, 2022
Published online: Jul 28, 2022
Published in print: Oct 1, 2022
Discussion open until: Dec 28, 2022
ASCE Technical Topics:
- Analysis (by type)
- Earthquake engineering
- Engineering fundamentals
- Failure analysis
- Failure modes
- Field tests
- Footings
- Forensic engineering
- Foundation design
- Foundations
- Geomechanics
- Geotechnical engineering
- Load bearing capacity
- Seismic effects
- Seismic tests
- Shallow foundations
- Slopes
- Structural engineering
- Tests (by type)
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