PHC管桩抗震性能及其改善措施的试验研究

【摘要】 对PHC管桩进行低周往复荷载作用下的抗震性能试验发现,PHC管桩会发生变形且延性不足。为改善其抗震性能,特对PHC管桩在模拟地震力作用下的受力状态、破坏机理进行了分析,并实施了二项改善措施。结果表明,影响PHC管桩在地震力作用下受弯状态抗震性能的主要因素为受力纵筋的变形能力,配置一定量的非预应力筋可明显改善PHC管桩的变形、延性、刚度退化等抗震性能,使高强混凝土的高承载性能得以充分利用。更多还原

【Abstract】 Bases on the cyclic loading test on the PHC Pile specimens,it finds hat PHC piles have no enough aseismic stability in deformation and ductility.For improving aseismic behavior of PHC piles,the force state and failure mechanism of the piles under imitation seismic action were analyzed.Two improvement measures of serismic behavior of PHC piles are carried out.The results indicate that the aseismic behavior of PHC piles is mainly influenced by the deformation capacity of the longitudinal steel bars.And by adding non-prestressed steel bars to PHC piles,their behaviors in deformation,ductility and stiffness degradation can be improved,and it makes full use of the high bearing of PHC.更多还原