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Shallow footings on sand under vertical central, eccentric and inclined loads
The centrifuge was utilized to study the effect of load eccentricity and inclination and initial burial on the bearing capacity of shallow footings on dense sand. A plane strain condition was insured by testing three adjacent footings along one line and having the same width. Footings were loaded with a stiff mechanism to give uniform displacement and therefore the one in the middle was under a plane strain condition. The load on each footing was measured with a load cell. Sand was glued to the bottom of the footings to simulate rough base conditions. Load was applied through longitudinal grooves along the footing axis where rotation of the footing was permitted but not translation. Vertical loads were applied to different grooves at different distances from the centerline to give eccentric loading, while loads inclined at different angles from the vertical axis were applied at the center of the footing. Fine silica sand F-75 in dense state, with a relative density of about 88 %, was used. Conventional analysis was performed and results were compared with the experimental values. The failure mechanism was monitored by trimming each sample after failure and the failure surfaces were used to check the plane strain conditions. Description of the experimental procedures as well as the trimming process are given in details.
Shallow footings on sand under vertical central, eccentric and inclined loads
The centrifuge was utilized to study the effect of load eccentricity and inclination and initial burial on the bearing capacity of shallow footings on dense sand. A plane strain condition was insured by testing three adjacent footings along one line and having the same width. Footings were loaded with a stiff mechanism to give uniform displacement and therefore the one in the middle was under a plane strain condition. The load on each footing was measured with a load cell. Sand was glued to the bottom of the footings to simulate rough base conditions. Load was applied through longitudinal grooves along the footing axis where rotation of the footing was permitted but not translation. Vertical loads were applied to different grooves at different distances from the centerline to give eccentric loading, while loads inclined at different angles from the vertical axis were applied at the center of the footing. Fine silica sand F-75 in dense state, with a relative density of about 88 %, was used. Conventional analysis was performed and results were compared with the experimental values. The failure mechanism was monitored by trimming each sample after failure and the failure surfaces were used to check the plane strain conditions. Description of the experimental procedures as well as the trimming process are given in details.
Shallow footings on sand under vertical central, eccentric and inclined loads
Oberflächennahe Fundamente auf Sand bei vertikal-zentraler, exzentrischer und schräger Belastung
Aiban, S.A. (author) / Znidavcic, D. (author)
1991
8 Seiten, 7 Bilder, 21 Quellen
Conference paper
English
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