Experimental And Numerical Simulation Research On The Anchorage Mechanism Under Dynamic Action Of Harmonic Wave

Anchorage technology is a very important and common method of reinforcement in the geotechnical engineering.it is the application of the anchor or anchor cable on rock reinforcement in order to give adequate capacity to the stability of the rock itself. Anchorage technology has not just been used in the water resources and hydropower, but in the areas of railway, civil construction,underground engineering,national defense construction,mine engineering and so on.But,at the present time,most of the geotechnical anchoring specifications and engineering experience stay in the role of static research and design theory, and rarely experimental study on the instantaneous power of the explosions so that the research and design theory in the earthquake is in the blank. Against the dynamic problem in the anchor project, base on destructive experimental under the dynamic action and combined with harmonic seismic wave simulation and numerical analysis,this paper conduct a more in-depth study for anchorage menchanism,anchors and grouting of shear stress distribution and dynamic pullout resistence under the dymanic load.On the basis of previous researchers,the work finished in this thesis focuses on several respects of the following:(1) Firstly, the present situation of domestic and foreign geotechnical engineering in anchor application and the research were introduced, and the main research content, significance and expected achieved goal about this article were proposed.(2) The type and application of the project geotechnical anchor was introduced, stress distribution and pullout resistance in the role of static was comprehensive analyzed.(3) By the laboratory test, the main failure shape of the anchorage structure is studied; anchorage body’s axial stress distribution rule in a different harmonic frequency,prestressed and the length of bolt are researched.By analyzing and comparing the difference between static and dynamic, the fundamental cause was obtained(4) Analyzed by ABAQUS within elastic area, the anchorage body’s axial stress distribution can be studied in the simulation with the increase of load, and its stress distrubtion with different anchorage lengths,frequencies were constrast;And, extract the point on the anchor,so that shear stress trends in the whole process was in-depth study. (5)Many valuable conclusions are summarized from the combination of questions discovered in pull-out tests and simulation results. At the same time, for the future research was given suggestion.The geotechnical anchoring theory is an important part of anchorage technology, reliable theoretical basis for theoretical analysis,optimal design and calculation of anchorage theory that under the dymanic load is provided from the researeh finding that obtained in this study.