A Comparision Study On The Ultimate Pull-Out Capacity Of Several Kinds Of Vertically Loaded Anchor Plates

Ultimate pull-out capacity of anchor plate is always the key problem in ocean engineering. Many scholars have studied the ultimate pull-out capacity of anchor plates in clay. However, most studies have only been the approximate solutions of bearing capacity of anchor plates in clay, or the empirical formula obtained from test. With the development of computer technology and numerical methods, more and more scholars used the finite element method to calculate the bearing capacity. As the development of anchor embedding technology, more and more vertically-loaded anchors will be used in more extensive ranges. So the requirements for the performance of the anchor plates are growing. In order to improve the performance of the bearing capacity of anchor plates, different shaped anchor plate must be studied in-depth.In this paper, based on the ideal elastic-plastic model of soil, and considering the interaction between anchor plates and soil, a three dimensional anchor plate model is established in ABAQUS platform. By applying the displacement loads on the anchor the ultimate pull out capacities are obtained.For the three kinds of anchor plates with different shapes, we have established three anchor plates finite element model. For the two cases whether the soil separate or not form the anchor, we study the variations of the UPC and the UPC factors by changing the depth of embedment of the anchor plate, aspect ratio of the rectangle anchor plate, the ellipticity of the circular-like anchor plate, the corner angles of the trapezoidal anchor plate. Meanwhile, in the case of separating soil from the anchor plates, the UPC and the UPC factors are also studied by changing the mooring force angles for trapezoidal and rectangular plate. Also, the paper examines the impact of friction factor on the surface of anchor plate on the ultimate pullout capacity factorThe results show that with the increase of embedment depth the bearing capacities of the three kind anchor plates increase gradually. With the increase of the aspect ratio of the rectangular plates, the capacity factors decrease. With the increase of the ellipticity, the capacity factors decrease slightly. For the trapezoidal anchor plate, the capacity factors decrease with the increase of the corner angles. The results also show that the friction coefficient have little impact on the UPC.