The Study Of The Bucket Foundation Bearing Under

As a new type of marine structures foundation form,suction bucket foundation not only has a broad prospect in in offshore oil field development,but also a good application in some projects such as harbor wharf.The bucket foundation buried in the clay of offshore bears not only the V loading caused by the upper buildings,but also the H loading and the M loading caused by wind and waves,so studying the bearing of the bucket foundation in these three combined loadings will be of great benefits which is later used in the real projects.The traditional way can hardly calculate the bucket foundation bearing under composite loadings,while the foundation bearing the failure envelop is effective and efficient way to study the bucket foundation in composite loadings.When the composite loadings the failure envelop in an unstable condition,then the failure envelop is in a stable condition.This paper studies the single compartment bucket foundations breakwater in Lian yungang,based on the simplified bucket foundation,using the large-scale ABAUQS Finite Element,then having a second development of the model,finally a conclusion of the bearing envelop of the bucket foundation under composite loadings is made.This paper mostly focuses on the following contents:1、A brief introduction of the theory of NHRI model,then having a second development of this model via Finite ABAQUS.This paper realizes the rationality and applicability,then confirm the basic parameter of the bucket foundation to establish the finite model.2、Analyzing the finite element model with movement control method,and this paper studies the separate failure models and the ultimate bearing features of the bucket foundation under the solo loading in V direction,H direction and M direction,then changing the parameter,and the formula of the of the different bucket foundation ultimate bearing capacity in different soil relative position.3、According to the above data of the bucket foundation ultimate bearing in different loadings,this paper uses the Swipe and movement ratio method to analyze the data,and the we can realize the situation of bucket foundation envelop bearing in different combined loadings.Then changing the parameter,we know the bucket foundation failure envelop under the different bucket buried depth and soil relative position,and then normalized this situation.4、Using the loading movement to analyze the situation of the bucket foundation under the combined action of V loading and H loading as well as the M loading,then come to the conclusion that the relation between the bucket buried depth and the soil relative location in different V loading,which provides a reference for the bucket foundation design.