The Research On The Dynamical Property And Anti-seismic Design Method Of Reinforced Earth Retaining Walls

The technology of moden reinforced earth is a new earthen technology that it has been developing since the middle period of the 20th century. It reinforces the earth by the reinforcement placed in the earth, the reinforced retaining wall is one of the applications. For a lot of advantages such as it is cheap, beautiful, etc, the technology of the reinforced earth retaining wall has been developing very fast since it come forth. But it is not maturated in some cases of the theory, especially of its dynamic character- istics and design method in anti-seismic. Today, the criterions for anti-seismic design are very simple.In order to solve the problems in anti-seismic design, the research is carried out the work that has been done include the following aspects:(1)Based on the deep analysis of the basic discipline of friction-reinforced theory and pseudo-cohesion concept, failure modals that can be existed in the reinforced earth retaining wall and their prevention measure and calculational methods are analysed and summarized.(2)Based on the research of the elastic-plastic FEA method of reinforced earth retaining wall, a elastic-plastic FEA method that using the elastic modal and elastic- plastic modal of earth in the reinforced earth retaining wall was presented.(3)The method to compose the earth, reinforcement, facing units to reinforced earth FEA modal is analysed, then the advantages and disadvantages of different modals that simulate the reciprocity between the earth and reinforcement used in the reinforced earth FEA modal are discussed.(4)Throw the study of the first four vibration modal of reinforced earth retaining wall and the analysis of twelve reinforced earth retaining walls with different height and different materials using ANSYS programe, the basic discipline of the first four vibration modals of reinforced earth retaining wall is gained.(5)By studying the natural frequency of the reinforced earth retaining wall,the basic discipline of the first four natural frequencies is found out.(6)Through the modal analysis of the reinforced earth retaining wallmade of different material, the effection of different material to natural frequency is gained.(7)Through the study of natural frequency and vibration modal of reinforced earth retaining walls, the flaws about factors need to be considered and calculation method of seismic forces in the criterions for anti-seismic design are put forward.(8)Based on the study of seismic design method of reinforced earth retaining wall...