Test Research Of The Prestressed Concrete Pipe Pile Model On Shaking Table

Through the pile foundation shaking table test and research, this article studied the prestressed pipe pile action of working performance under the earthquake action. The experiment test the pipe pile-soil-upper structure model of the action under different seismic wave, to analyse the pipe pile body of the produce acceleration along the distribution of the pile body, and dynamic characteristics of the foundation soil influence on the model seismic response of pile body. It analyse the action of response of the size of pipe, under different sites and different earthquake level. It tests the relationship of the earthquake intensity and pile seismic response. This paper mainly includes the following content:(1) According to the research methods of the interaction of pile-structure and prestressed pipe pile research situation, this paper confirmed the prestressed pipe pile as the research object, mainly analyzed and research on prestressed pipe pile under the action of earthquake characteristics;(2) According to the seismic design of pile foundation theory, this paper analyses the pile top bending moment and horizontal load to the influence of pile under the action of earthquake and common calculation methods;(3) Through the similarity relation theory to simulate the test model, writer makes1/10scale model of the prestressed pipe pile and foundation soil and the upper structure. In the cases of simulated seismic shaking table test, this paper accumulated the model pile test experience.(4) The writer make test of the dynamic single shear tests of foundation soil model, obtaining the model of the dynamic properties parameters change rule of soil, and the dynamic characteristics of the soil influence to model the pile stress.(5) The peak acceleration amplification coefficient of pile-structural system show "K" type distribution at the height in all the conditions. Acceleration amplification coefficient has declined with the increase of the vibration intensity. Model of foundation soil shear wave velocity change before and after test, after test of shear wave is less increase than before, because in many cases vibration model foundation soil is become dense. At this time feature period is decrease with working condition.The model test obtains pile model stress state under the action of earthquake. In order to that, it could give more scientific and reasonable basis application in the pipe pile engineering.