混合配筋高强预应力管桩抗震性能分析

Analysis on Seismic Performance of High-strength Prestressed Pipe Pile with Mixed Reinforcement

文章以混合配筋高强预应力管桩作为研究对象,选取普通钢筋配筋率及轴压比作为研究参数,基于OpenSees软件平台分析了该类管桩在低周循环荷载作用下的承载能力及滞回性能。结果表明,配置普通钢筋的高强预应力管桩的承载能力及滞回性能得到较大改善,适当增大轴压比有利于提高管桩的承载能力,而当轴压比过大时,管桩的残余位移增大,不利于管桩的抗震性能。

This paper takes high-strength prestressed pipe pile with mixed reinforcement as the research object,and selects the reinforcement ratio and axial compression ratio of ordinary steel bar as the research parameters.Based on the OpenSees software platform,the bearing capacity and hysteresis performance of this kind of pipe pile under low cycle loading are analyzed.The results show that the bearing capacity and hysteresis performance of high-strength prestressed pipe piles with ordinary steel bars are greatly improved,and appropriate increase of axial compression ratio is beneficial to improve the bearing capacity of pipe piles.However,when the axial compression ratio is too large,the residual displacement of pipe piles increases,which is not conducive to the seismic performance of pipe piles.