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Dynamic calculation model and seismic response for frame supporting structure with prestressed anchors

查看全文 作　　者：DONG JianHua1’2, ZHU YanPeng1, ZHOU Yong1 & MA Wei2 1 College of Civil Engineering, Lanzhou University of Technology, Lanzhou 730050, China;2 State Key Laboratory of Frozen Soil Engineering, Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, Lanzhou 730000, China 高影响力作者 出　　处：《Science China(Technological Sciences)》索引2010年第53卷第7期,共10页高影响力期刊 基　　金：supported by the National Natural Science Foundation of China (Grant No. 50978129);the Gansu Provincial Science and Technology Foundation of China (Grant No. 2GS064-A52-040);Scientific-research Development Foundation of Lanzhou University of Technology (Grant No.BS04200901) 摘　　要：A dynamic calculation model of frame supporting structures with prestressed anchors for the slope stability is proposed. The frame and soil are closely contacted in the role of prestressed anchors and they cannot be separated along the whole slope. The lateral displacement of frame and soil is nearly in phase. The movement characteristic satisfies the theory of elastic foundation beam. The frame is treated with elastic foundation beam in this model. The influence of prestressed anchors is simplified as linear spring and damped system related with velocity. Under the condition of horizontal earthquake excitation, the equation of vibration response is established by using the model of dynamic Winkler beam and the analytical solutions are obtained for simple harmonic vibration. This method is applied to a case record for illustration of its capability, in order to verify the method, 3D nonlinear FEM (ADINA) is used to analyze the seismic performance of this case, the comparative results show that the design and the analysis are safe and credible by using the proposed method. The calculation model provides a new way for earthquake analysis and seismic design of slope stability supported by frame structure with prestressed anchors. 关 键 词：FRAME supporting structure with PRESTRESSED ANCHOR SLOPE DYNAMIC calculation model SEISMIC performance SEISMIC design
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