Pullout capacity and displacement behavior of opening plate anchor using plane strain box

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4. Pullout capacity and displacement behavior of opening plate anchor using plane strain box

In the present paper, the effect of width (B) and embedment ratio (H/B) (H, depth of embedment/B, anchor width) of a newly designed opening plate anchor on its pullout capacity (Pu) and corresponding displacement (du) are investigated experimentally. Two series of 1g small scale physical model tests were implemented in sand with relative density of 75% located in a completely observable box (thin section) that imposed plane strain conditions. In the first series, three pullout tests were performed on opening plate anchors with different width of 120, 150 and 180mm at embedment ratio of 3. It was indicated that anchor width significantly influenced anchor pullout capacity (Pu), but the corresponding relative displacement (du/B) stays constant relatively. In second series of tests, three tests were performed on the opening plate anchors with width of 120, 150 and 180mm with embedment ratio of 7. It was concluded that increasing embedment ratio, increases the anchors pullout load, however it does not change the relative displacement (du/anchor width) significantly. At the ultimate loads instance, soil deformation field around the anchor was observed using Particle Image Velocimetry (PIV). It was indicated that at embedment ratio of 3, failure surfaces reached the soil surface, but at embedment ratio of 7, failure surfaces create plastic zones formed a tunnel shape in the soil and do not cross the soil surface.

4th Asia-Pacific Conference on Physical Modelling in Geotechnics (ACPMG2024)

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