Seismic Response of Prestressed Anchors with Frame Structure

Abstract EN

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.