Be through with a full-scale test about prestressed bridge tower anchor zone, confirming the stress distribution of the model in the process of the action by the load, synthetically the law of the crack come into existence and expand, by the way of the load and the deformation of the model, getting the ultimate bearing capacity of the anchor zone. Based on the testing result, the large-scale nonlinear finite element software Msc.Marc has been utilized to analyze the reaction of the model under the pressure, on one hand, it proves the reliability of the test, otherwise, it provides the tool for the research about the spatial structure. And the plasticity theory has been used to analyze the orifice plate, and come to its plasticity ultimate bearing capacity.
