Abstract
Based on the equivalent mass-spring model and considering the coupling effect between creep soil and prestressed anchors, the dynamic calculation model of prestressed anchors with frame structure is established. The soil mass is expressed in the form of concentrated mass. The action of the frame structure on the soil is treated as a parallel coupling of a linear spring and a linear damper, and the free section of the anchor is treated as a linear spring. Considering the creep characteristics, the soil is regarded as a Generalized Kelvin body and the anchoring section of the anchor is regarded as an equivalent spring body, which are coupled in parallel. Considering the effect of slope height, the dynamic calculation model is solved and the seismic response is analyzed. Finally, an engineering example is used to verify the calculation method in this paper, and the results are compared with the shaking table test and numerical simulation. It shows that the calculation model proposed in this paper is safe and reasonable for the seismic design and analysis of the slope supported by prestressed anchors with frame structure.
Highlights
IntroductionThe traditional gravity retaining wall was used in the support technology of highway, railway, and building slope
In the past, the traditional gravity retaining wall was used in the support technology of highway, railway, and building slope.ese traditional retaining structures often have the disadvantages of insufficient stability and poor seismic performance.e analysis of slope stability and ground motion is still a hot topic in geotechnical engineering research
In this paper, based on the equivalent mass-spring model and considering the coupling effect of creep soil and prestressed anchors, the calculation model of prestressed anchors with frame structure is established. e soil mass is expressed in the form of concentrated mass
Summary
The traditional gravity retaining wall was used in the support technology of highway, railway, and building slope. Considering the nature of the mutual influence between a structure and its supporting soil, Dong et al [8] established a dynamic calculation model for slope stability of supporting frame with prestressed anchors. According to the characteristics of prestressed anchors with frame structure and based on the equivalent mass-spring model, the calculation model of frame-soil system can be established. In this paper, based on the equivalent mass-spring model and considering the coupling effect of creep soil and prestressed anchors, the calculation model of prestressed anchors with frame structure is established. In order to get the seismic response of the slope supported by the prestressed anchor with frame structure, the dynamic model of it must be established correspondingly. The coupling between the equivalent spring body and the Generalized Kelvin body is considered by taking the microelement body from the anchoring section of the anchor
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