Analysis And Research Of The Pipe Pile Model Shaking Table Test

In recent years, with the rapid development of China’s economic construction and thecontinuous expansion of the scale of capital construction, China is seeing a number ofhigh-rise or high-rise buildings, and the emergence of many new forms of pile.Prestressed concrete pipe pile foundation has a high capacity, good stability, settlement,seismic performance and able to adapt to a variety of complex geological conditions，soit has wildly used. China’s construction industry, however, rarely have seismic designspecification of pile foundation, less in pipe pile seismic performance research. Thispaper study double pile internal forces under horizontal seismic, pile load, displacementdistribution of the shaking table model test. This has laid a solid theoretical foundationfor the future application and further development of the concrete pipe pile.Based on the model of double pile shaking table test, this paper study the seismicperformance of prestressed concrete pipe pile. During a test, the comparison of differentupper structure model and the same upper structure different excitation frequencies anddifferent excitation intensity and other conditions were considered. This paper analyzedthe pipe pile pile body the strain generated, bending moment, shear force, load, as wellas the displacement along a pile the distribution of; and summarizes the the reactionrule tubular pile of in the under horizontal seismic action.Through the double-pile simulation of shaking table test, this paper draws thefollowing key findings:1. In the model tests under different conditions, pipe pile strain, bending moment,shear along the pile distribution law is basically the same, nothing to do with the role ofworking conditions. From the top of the pile200mm to250mm (4to5times the pilediameter) there is the maximum of bending moment. Moment about from the pile top800mm (16times the pile diameter) changes stably.2. Under different conditions, the pipe pile strain and internal forces along the pilesize due to the excitation frequency and excitation intensity. Among them, the same asthe excitation frequency, the greater the peak acceleration, pipe piles along the pileinternal force is greater. The same excitation intensity, excitation frequency gets closerto the natural frequency of the upper structure, the greater the internal forces of reaction pipe pile.3. In each earthquake conditions, pipe piles along the pile load and displacementdistribution is basically the same shape, the size of the excitation intensity andexcitation frequency.