地震作用下框架预应力锚杆边坡锚固结构的动力计算方法

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Abstract In order to accurately carry out dynamic analysis and seismic design of the new slope anchorage structure，the study of its dynamic properties and seismic design theory is very necessary and urgent. The movement characteristics satisfy the theory of elastic foundation beam under the prestressed anchor action. A dynamic calculation model of frame with prestressed anchors for slope stability is established based on Winkle elastic beam theory. Under the horizontal earthquake excitation，the equation of vibration for slope supported by frame with prestressed anchors and slope is deduced considering the influence of beam and retaining plate，and the analytical solution is obtained. Finally，the proposed method is applied to a project case for illustrating its capability of earthquake response. In order to investigate the effectiveness and reliability of this method，it is compared with finite element method and shaking table test，the results show a good agreement. The analysis of slope with supporting and without supporting reveals that this structure can evidently decrease the earthquake response and has better seismic performance. The calculation model provides a new approach for earthquake analysis and seismic design of slope supported by frame supporting structure with prestressed anchor.

Key words： slope engineering frame beam prestressed anchors seismic effect dynamic calculation model earthquake response

Received: 18 October 2012

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http://www.rockmech.org/EN/Y2014/V33/Isl/3135

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