Limit analysis of ultimate uplift capacity and failure mechanism of shallow plate anchors in multi-layered soils

Abstract

Considering the fact that in some complex cases, plate anchors are buried in multi-layered geotechnical materials, the ultimate dynamic analysis was performed to investigate the uplift capacity and failure mechanism of shallow strips and circular plate anchors in multi-layered soils. The nonlinear strength criterion and non-associated flow rule of geotechnical materials were introduced to investigate the influence of nonuniformity on the pullout performance and failure mechanism of shallow plate anchors. The expressions of the detaching curves or surfaces were obtained to reflect the failure mechanism, which can be used to figure out the ultimate uplift capacity and failure range. The results are generally in agreement with the numerical simulations and previous research. The effects of various parameters on the ultimate uplift capacity and failure mechanism of plate anchors in multi-layered soils were investigated, and it is found that the ultimate uplift capacity and failure range of shallow anchors increase with the increase of initial cohesion and dilatancy coefficient, but decrease with the unit weight, axial tensile stress and nonlinear coefficient.

Keywords

limit analysis / dilatancy coefficient / ultimate uplift capacity / plate anchors / multi-layered soils

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