车辆撞击下承插式桥墩损伤评估与性能化设计方法  

Damage Assessment and Performance-based Design Method of Socket Pier under Vehicle Impact

作　　者：袁龙鑫 高小康 张于晔[1] YUAN Longxin;GAO Xiaokang;ZHANG Yuye(School of Safety Science and Engineering,Nanjing University of Science and Technology,Nanjing 210094)

机构地区：[1]南京理工大学安全科学与工程学院,南京210094

出　　处：《公路交通技术》2025年第2期70-78,共9页Technology of Highway and Transport

基　　金：国家自然科学基金项目(52278188);江苏省自然科学基金项目(BK20211196);江苏省研究生科研与实践创新计划项目(SJCX24_0166)。

摘　　要：针对预制承插式桥墩抗车撞性能化设计问题,采用精细化双柱承插式桥墩有限元建模方法,结合侧向冲击缩尺试验验证了钢筋混凝土材料模型与数值算法的有效性,进而探讨了不同参数下桥墩受撞的位移响应,并提出基于1/2墩高处残余挠度的损伤评估方法,对桥墩损伤等级进行了量化分析。结果表明:1)车辆初始撞击能量和灌浆料厚度的变化对桥墩位移响应影响较大;2)桥墩中部残余位移越大,其受撞后损伤越严重;3)损伤指标λ可准确评估车辆撞击后承插式桥墩损伤状态,提出的损伤指标计算公式可合理评价车撞承插式桥墩性能水平,为承插式桥墩的抗车撞设计提供参考。To address the issue of anti-collision performance design of prefabricated socket pier.the finite element modeling method of refined double-column socket pier is used to verify the validity of the reinforced concrete material model and numerical algorithm combined with the lateral impact scale test,and then the displacement response of the pier under different parameters is discussed.The damage assessment method based on the residual deflection at 1/2 pier height is proposed,and the damage grade of the pier is quantitatively analyzed.The results show that:1)Both the initial impact energy of the vehicle and the thickness of the grouting material have a significant influence on the pier′s displacement response.2)An increased residual displacement at the midsection of the pier is associated with more extensive damage following a collision.3)The damage indexλserves as an effective metric for assessing the damage condition of the socket pier after vehicle impact.The proposed formula for calculating the damage index offers a sound evaluation of the performance level of the socket pier under vehicle impact,providing a valuable reference for its design against vehicle collisions.

关 键 词：桥梁工程 性能化设计 数值仿真 损伤评估 承插式桥墩 

分 类 号：U447[建筑科学—桥梁与隧道工程]