市政技术2026，Vol.44Issue(9)：1-12,137,13.DOI:10.19922/j.1009-7767.2026.09.001
无主筋先张预应力高韧性混凝土预制桥墩抗震性能数值仿真分析
Numerical Simulation Analysis on Seismic Performance of Precast Piers with Pretensioned High-toughness Concrete without Main Reinforcement
摘要
Abstract
To satisfy seismic design requirements,conventional cast-in-place piers generally require high reinforce-ment ratios,which brings complicated on-site construction and low efficiency.To promote the development of pre-cast segmental pier technology with low-reinforcement prestressing,this study adopts numerically analyzed models verified by tests to systematically investigate the influences of key parameters on the seismic performance of preten-sioned high-toughness concrete precast piers without main reinforcement,including reinforcement ratio of energy-dissipating steel bars,prestressing tendon ratio,initial jacking stress,socketed embedment depth,and steel-con-crete bond behavior.The results show that increasing the reinforcement ratio of energy-dissipating steel bars effec-tively improves the bearing capacity and energy-dissipation capacity yet enlarges residual displacement.Raising the prestressing tendon ratio significantly enhances initial stiffness and peak bearing capacity,while increasing total ax-ial compression ratio and residual displacement consequently.Higher initial jacking stress of prestressing tendons reduces residual displacement but degrades pier ductility.Increasing socketed embedment depth improves bearing capacity but reduces shear-span ratio,possibly shifting failure mode from flexural failure to flexure-shear failure.Comparatively,the composite configuration of unbonded prestressing tendons and unbonded energy-dissipating steel bars with moderately reduced initial jacking stress can delay yielding of prestressing tendons,control prestress loss and mitigate residual displacement while maintaining bearing capacity.It substantially improves ductility and self-centering capacity and achieves optimal comprehensive seismic performance.The research findings provide theoreti-cal basis and technical approaches for seismic optimization design of low-reinforcement pretensioned high-toughness concrete precast piers.关键词
桥梁抗震性能/预应力桥墩/预制拼装桥墩/高韧性混凝土/OpenSees数值模拟/参数分析Key words
bridge seismic performance/prestressed pier/precast assembled pier/high-toughness concrete/OpenSees numerical simulation/parametric analysis分类
交通工程引用本文复制引用
贾俊峰,张先可,黄河,康玲,柏颢原..无主筋先张预应力高韧性混凝土预制桥墩抗震性能数值仿真分析[J].市政技术,2026,44(9):1-12,137,13.基金项目
国家重点研发计划项目(2023YFC3805100,2023YFC3805101) （2023YFC3805100,2023YFC3805101）
四川省交通运输科技项目(2022-ZL-05) （2022-ZL-05）
