Akademik Veri Yönetim Sistemi
11th International Congress on Advances in Civil Engineering, İstanbul, Türkiye, 21 - 25 Ekim 2014, sa.1736, ss.1-6
In recent decades, many authors have paid great attention to the evaluation of bearing capacity of centrally loaded footings near slopes. The bearing capacity decreases when a footing is placed near a slope. In addition to vertical loads, the footings are often subjected to moments caused by the forces of earth pressures, earthquakes, etc. Eccentricity is defined as moment over vertical load. It is known that an eccentrically loaded footing carries fewer ultimate loads than the same centrally loaded footing and the decrease in ultimate load increases with eccentricity.
In this study, bearing capacity tests were conducted on a model shallow strip footing on unreinforced and reinforced sand slope with different eccentricities (inside, on the boundary and outside of the core) to determine failure surfaces. Only one geotextile layer was placed horizontally.
Failure surfaces were drawn by using stereo-photogrammetric technique from tests done by using model strip footings on unreinforced and reinforced sand slope. From failure surfaces, it can be said that there are big differences between reinforced and unreinforced test conditions. A triangular wedge occurred under the strip footing for unreinforced condition but this wedge turned into trapezoid zone and a triangular wedge occurred under the reinforcement for reinforced condition. Both triangular wedge and combination of trapezoid and triangular wedge became unsymmetrical with increasing eccentricity. The primary failure surfaces were observed on the eccentricity (slope) side and the secondary failure surfaces were observed on the other side in all cases. Lengths of primary and secondary failure surfaces decreased with increasing eccentricity.