Dynmnic Response Analysis for Embedded Large-Cylinder Breakwaters Under Wave Excitation     

王元战祝振宇  周枝荣 《中国海洋工程》2004,18(4):585-594

A numerical model is developed for dynamic analysis of large-cylinder breakwaters embedded in soft soil. In the model, the large cylinder is taken as a rigid body divided into elements and the soft soil is replaced by discrete 3D nonlinear spring-dashpot systems. The numerical model is used to simulate the dynamic response of a large-cylinder breakwater to breaking wave excitation. The effects of the dynamic stress-strain relationship models of the soil, the radius and embedded depth of the cylinder, the nonlinear behaviors of the soil, and the limit strength condition of the soil on the dynamic responses of the large-cylinder structure are investigated with an example given. It is indicated that the above-mentioned factors have significant effects on the dynamic responses of an embedded large cylinder breakwater under breaking wave excitation.  相似文献   

An Approach to Stability Analysis of Embedded Large-Diameter Cylinder Quay   总被引：3，自引：3，他引：3  

WANG  Yuanzhan 《中国海洋工程》2002,16(3):383-393

The large-diameter cylinder structure, which is made of large successive bottomless cylinders placed on foundation bed or partly driven into soil, is a recently developed retaining structure in China. It can be used in port, coastal and off-shore works. The method for stability analysis of the large-diameter cylinder structure, especially for stability analysis of the embedded large-diameter cylinder structure, is an important issue. In this paper, an idea is presented that is, em-bedded large-diameter cylinder quays can be divided into two types, i.e. the gravity wall type and the cylinder pile wall type. A method for stability analysis of the large-diameter cylinder quay of the cylinder pile wall type is developed and a method for stability analysis of the large-diameter cylinder quay of the gravity wall type is also proposed. The effect of sig-nificant parameters on the stability of the large-diameter cylinder quay of the cylinder pile wall type is investigated through numerical calculation.  相似文献   

软土地基条件下大型圆筒海岸结构稳定性计算方法   总被引：4，自引：0，他引：4  

王元战  华蕾娜  祝振宇 《岩土力学》2005,26(1):41-45

针对一工程发生破坏的实例,对软土地基条件下大型圆筒海岸结构的设计与计算方法进行了比较分析,并对波浪水流作用下软土特性参数的选取、泥面冲刷对结构稳定性的影响等进行了讨论。提出了反复荷载作用下软土的动力特性、水流作用下结构周围泥面的冲刷演变规律以及波浪作用下大型圆筒结构与软土的动力相互作用等,这都是软土地基条件下大型圆筒海岸结构工程应用亟待解决的关键问题。  相似文献   

Dynamic Response Analysis for Embedded Large-Cylinder Breakwaters Under Wave Excitation   总被引：4，自引：0，他引：4  

王元战  祝振宇  周枝荣 《中国海洋工程》2004,18(4)

1 .IntroductionThestaticmethodsarecommonlyusedinthestabilityanalysisofembeddedlarge cylinderbreak waters .Thestaticanalysismodelscanbedividedintotwocategories :simplifiedmodels (Zhouetal.,1 995;WangandZhu ,2 0 0 2 )andfiniteelementmodels (MengandWang ,1 999) .Thesimplifiedmodelsinheritthetraditionalengineeringexperiencesandareconvenienttouseinengineeringprac tice.However,itisdifficultforthesimplifiedmodelstodepictthegeometricandphysicalpropertiesofastructure soilsystemprecisely .Thefiniteel…  相似文献   

高桩码头岸坡稳定有限元分析   总被引：7，自引：0，他引：7  

王元战  祝振宇  张宝华  刘现鹏 《海洋工程》2006,24(4):27-31

采用有限元强度折减法分析岸坡稳定是目前比较前沿的研究成果,该方法在获得抗力分项系数的同时,可以得到岸坡土体的应力、位移场、塑性区以及桩基对岸坡稳定的影响。对国内某突堤码头建立了有限元模型,土体采用与Mohr-Column准则匹配的Drucker-Prager弹塑性准则,首次利用强度折减有限元法分析了在桩基影响下的成层土岸坡稳定问题,并给出了抗力分项系数、塑性区和位移场,从而为高桩码头岸坡的稳定性计算提供参考依据。  相似文献