北京交通大学学报2026，Vol.50Issue(2)：56-67,12.DOI:10.11860/j.issn.1673-0291.20250057
混合连接预制装配式桥墩侧向变形能力计算方法研究
Study on the calculation method for lateral deformation capacity of precast bridge piers with hybrid connections
摘要
Abstract
To address the limitation that existing research on the lateral deformation capacity of precast bridge piers predominantly focuses on single connection types,rendering it unsuitable for hybrid-connected precast piers with distinct structural configurations and load transfer mechanisms,a calcula-tion method for the lateral deformation capacity of such bridge piers is proposed.This study investi-gates a precast bridge pier utilizing hybrid connections,specifically,unbonded prestressing tendons,grouted sleeves,and shallow socket connections,employed in the Beijing-Xiong'an Transit Express Line.Based on a full-scale quasi-static test,a refined numerical model is established using ABAQUS,incorporating concrete damage,bond-slip behavior of longitudinal reinforcement,and the mechanical characteristics of unbonded prestressing tendons.Through parametric sensitivity analysis,the influence of various design parameters on the Plastic Hinge Length(PHL)of the precast bridge pier is elucidated.Furthermore,an empirical formula for calculating the equivalent PHL applicable to such piers is pro-posed via nonlinear regression analysis.Building upon the equivalent plastic hinge theory,a method for calculating the lateral displacement at the pier top is proposed,accounting for both the flexural deforma-tion of the pier body and the rotational deformation of the socketed section.The results indicate that the PHL increases with greater superstructure dead load,shear span ratio,longitudinal reinforcement ratio and yield strength,initial prestressing force,and socket depth.Conversely,it decreases as concrete strength and sleeve length increase.The equivalent PHLs and the load-displacement curves calculated using the proposed method align well with the experimental results,exhibiting an ultimate displacement prediction error of merely 3.96％.The results provide a theoretical reference for the deformation capacity evaluation and seismic design of precast bridge piers with hybrid connections.关键词
桥梁工程/预制装配式桥墩/等效塑性铰长度/侧向变形能力/数值模拟Key words
bridge engineering/precast bridge pier/equivalent plastic hinge length/lateral deformation capacity/numerical simulation分类
交通工程引用本文复制引用
张耀东,李辰,江辉,庄建杰,薛智文,吕金峰..混合连接预制装配式桥墩侧向变形能力计算方法研究[J].北京交通大学学报,2026,50(2):56-67,12.基金项目
河北省重点研发计划(22346101D) （22346101D）
国家自然科学基金(52378473) （52378473）
北京市自然科学基金(8192035) （8192035）
中央高校基本科研业务费专项资金(2023JBZY029)Key R&D plan of Hebei Province(22346101D) （2023JBZY029）
National Natural Science Foundation of China(52378473) （52378473）
Beijing Mu-nicipal Natural Science Foundation(8192035) （8192035）
Fundamental Research Funds for the Central Universities(2023JBZY029) （2023JBZY029）
