车辆撞击下预制节段拼装桥墩的损伤分析与评估

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摘要为合理评估车辆撞击下预制节段拼装桥墩的损伤状态，研究适用于预制拼装桥墩的受撞损伤评估方法。建立车辆撞击桥墩三维有限元模型并进行桥墩损伤分析，通过与试验结果对比验证桥墩与车辆模型的准确性。分析不同参数下预制节段拼装桥墩受撞的位移响应和损伤破坏特征，并研究残余位移与截面损伤的变化规律。提出考虑残余位移和截面损伤的预制节段拼装桥墩受撞损伤评估指标，对桥墩进行损伤等级划分并确定各损伤等级指标界限值。研究结果表明：试验范围内桥墩位移响应对车辆初始撞击能量和轴压比变化最为敏感；车撞下预制节段拼装桥墩损伤集中于直接受撞击节段；桥墩受撞处残余位移和截面损伤率越大,其受撞后损伤越严重；考虑残余位移和截面损伤的桥墩损伤评估方法可准确评估车辆撞击下预制节段拼装桥墩的损伤状态。

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	张于晔1
	李清华1
	樊伟2
	袁万城3

关键词 ：预制节段拼装桥墩, 车辆撞击, 损伤评估, 残余位移, 截面损伤

Abstract：In order to reasonably evaluate the damage states of precast segmental bridge columns (PSBCs) under vehicle impact, a collision damage evaluation method suitable for PSBCs was investigated. A three-dimensional finite element model of the vehicle impacting PSBCs was established and the damage analysis of the columns was carried out. The accuracy of the pier and the vehicle model was verified by comparison with the test results. The displacement response and damage characteristics of PSBCs with different parameters were analyzed, and the change law of residual displacement and cross-section damage was studied. The damage evaluation index of PSBCs considering residual displacement and section damage is proposed, and the damage states of the columns was divided and each damage state limit was determined. The research results show that the displacement response of the PSBCs in the test range is most sensitive to the initial impact energy and axial compression ratio of the vehicle; the damage of the PSBCs under the collision of the vehicle is concentrated on the directly impacted segment; the greater the residual displacement and section damage rate of the column in a vehicle collision, the more serious the damage after the collision; the bridge column damage assessment method that considers the residual displacement and section damage can accurately evaluate the damage state of the PSBCs under vehicle impact.

Key words： precast segmental bridge columns vehicle impact damage assessment residual displacement section damage

收稿日期: 2021-08-25 出版日期: 2022-12-28

引用本文:

张于晔1，李清华1，樊伟2，袁万城3. 车辆撞击下预制节段拼装桥墩的损伤分析与评估[J]. 振动与冲击, 2022, 41(24): 150-158.
ZHANG Yuye1,LI Qinghua1,FAN Wei2,YUAN Wancheng3. Damage analysis and assessment of precast segmental columns subjected to vehicle collision. JOURNAL OF VIBRATION AND SHOCK, 2022, 41(24): 150-158.

链接本文:

http://jvs.sjtu.edu.cn/CN/ 或 http://jvs.sjtu.edu.cn/CN/Y2022/V41/I24/150

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