润扬大桥悬索桥北锚碇基础接触应力仿真分析

针对润扬大桥悬索桥北锚碇基础的浇筑施工、运行过程，基于大型有限元分析软件Marc进行二次开发，建立了锚碇基础和土体共同作用的三维有限元仿真计算模型。考虑锚碇基础浇筑过程中地下水位改变引起基底水压力的变化对锚碇基础接触应力分布的影响，对锚碇体浇筑到运行的全过程进行了仿真数值计算，揭示了岩层地基上悬索桥重力式嵌岩锚碇基础接触应力在施工到运行过程中的变化规律。工程实例数值计算结果表明，在不同施工浇筑阶段，尽管锚碇基础不同部位的接触应力呈现出不同的变化特征，北锚碇基础在施工到运行全过程中基础接触应力总体满足设计要求。

Numerical Simulation of Contact Stresses under North Anchor Foundation of Runyang Suspension Bridge

For the concreting construction and running process of north anchor foundation of Runyang suspension bridge, the three- dimension finite element simulation model considering the interaction ot anchor foundation and soil is founded based on the secondary development of Marc. the change of groundwater level results in the change of the water pressure During the construction process, under foundation, and then the change of the distribution of contact stresses. By the numerical simulation from the construction to running process, the change law of the contact stresses of gravitational rock - socketed anchor foundation is opened out.By the computation for the contact stresses of different anchor foundation from the engineering example, during different stages of concreting construction, though the parts of anchor foundation take on different characters, the contact stresses of north concreting process to running process satisfy the request of design as a whole.