建筑结构学报2025，Vol.46Issue(8)：229-242,14.DOI:10.14006/j.jzjgxb.2024.0664
加筋预应力高强混凝土管桩现场拟静力试验与有限元分析
Field quasi-static experiment and numerical analysis on prestressed high-strength concrete pipe piles with extra reinforcements
摘要
Abstract
Prestressed high-strength concrete(PHC)piles are widely used due to their high load-bearing capacity and economic benefits,but they are prone to brittle failure.The introduction of prestressed high-strength concrete reinforced with non-prestressed tendons(PHCR)piles helps to address these issues.Field tests consisting of two PHC piles and two PHCR piles in full size were conducted to investigate the seismic performance of different pile types by comparing the experimental phenomena and failure modes of each specimen.Under horizontal cyclic loading,the skeleton curves,horizontal loads at different stages,displacement ductility,stiffness degradation,and reinforcement strain were examined.The results indicate that increasing the prestressed steel reinforcement ratio improves the initial stiffness of the pile and significantly enhances the maximum horizontal load.Meanwhile,adding non-prestressed steel reinforcement delays the yielding and stiffness degradation of the prestressed steel,greatly enhances the ductility of the pile,and reduces the brittle failure risk.On this basis,a three-dimensional pile-and-soil finite element model was established using ABAQUS to further examine the effects of prestressed reinforcement ratios(PRs)and non-prestressed reinforcement ratios(NPRs)on seismic performance of PHC and PHCR piles.Analysis reveals an optimal NPR for each PR.When the ratio of two bar ratios is close to 1,the deformation capablity of the prestressed pile can be maximally enhanced while ensuring the horizontal bearing capacity.关键词
预应力高强混凝土管桩/非预应力钢筋/现场试验/有限元分析/抗震性能Key words
prestressed high-strength concrete(PHC)pipe pile/non-prestressed reinforcement/field test/finite element analysis/seismic performance分类
建筑与水利引用本文复制引用
郑刚,闫城东,刘畅,赵博,刘永超..加筋预应力高强混凝土管桩现场拟静力试验与有限元分析[J].建筑结构学报,2025,46(8):229-242,14.基金项目
国家自然科学基金项目(52078335,52278406). （52078335,52278406）
