Numerical Analysis On The Performance Of The Anti-seimic Anchor Under Seismic Load

The prestressed anchor cable is a kind of rod component which is main sustain tension. Through the pretensioned stress, which can reinforce solid stability and limit its deformation. As a more economical and efficient method of anchoring, the application is very extensive. But domestic and overseas scholars have not studied the seismic performance and occurrence mechanism of the anchor cable systematically. Slope sliding accidents which rely on the prestressed anchor cable in the Wenchuan earthquake has seriously hindered the rescue works after the earthquake, So we must strengthen the research the principle of seismic, the performance and limitations of the prestressed anchor cable. Exert the anchor rope good seismic performance and find out the weak link to improve. This can improve the seismic performance of existing anchor rope, evaluate the safety of the anchor cable engineering reasonability, guarantee the security of the lifeline-engineering in the high intensity seismic region, and its importance to the engineering application and practical significance.In order to research the dynamic response of anti-seimic anchor cable problem under the earthquake, this article is carrying out a research into the seismic cable rely on the background of highway slope from Dujiangyan to Wenchuan highway, the main research content is as follows:First I summarize the anchorage mechanism, research status of the seismic behavior of prestressted anchor cable domestic and overseas, the action of slope stability analysis method with earthquake, and general method of seismic analysis of anchorage system.Introduced the working principle and characteristics of seismic anchor cable in simple, in addition, according to the result of seismic performance of anchor static load test, finishing polynomial fitting formula of force-displacement with MATLAB.Based on the basic principle of dynamics, the methods of theoretical analysis and numerical simulation, I study on seismic dynamic response of anchor cable. By changing the process of numerical simulation of seismic acceleration, frequency and selecting different factors such as seismic waves, discuss out of various factors on the seismic dynamic response, furthermore, it is compared with the dynamic response of a common type of prestressted anchor cable.With the above conclusion, making analysis and comparison all of response upon the action of the seismic anchor cable under earthquake shaking, which proves the superiority of new anchor cable. That makes significance and provides a direction on rationally evaluate the safety of the anchor cable engineering, it will have practical significance to improve the design and construction of anti-seimic anchor cable.