[1]赵武超,钱 江.重型车辆撞击桥墩的破坏模式及抗撞性能分析[J].防灾减灾工程学报,2019,39(01):67-74+88.[doi:10.13409/j.cnki.jdpme.2019.01.010]
 ZHAO Wuchao,QIAN Jiang.Failure Mode and Impact Performance of Bridge Piers Subjected to Heavy Vehicle Collision[J].Journal of Disaster Prevention and Mitigation Engineering,2019,39(01):67-74+88.[doi:10.13409/j.cnki.jdpme.2019.01.010]
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重型车辆撞击桥墩的破坏模式及抗撞性能分析()
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防灾减灾工程学报[ISSN:1672-2132/CN:32-1695/P]

卷:
39卷
期数:
2019年01期
页码:
67-74+88
栏目:
论文
出版日期:
2019-02-28

文章信息/Info

Title:
Failure Mode and Impact Performance of Bridge Piers Subjected to Heavy Vehicle Collision
文章编号:
1672-2132(2019)01-0067-08
作者:
赵武超 钱 江
同济大学土木工程与防灾国家重点实验室,上海 200092
Author(s):
ZHAO Wuchao QIAN Jiang
State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China
关键词:
车-桥碰撞 破坏模式 截面抗剪能力 抗撞能力 等效碰撞力
Keywords:
vehicle-bridge collision failure mode shear capacity impact capacity equivalent impact force
分类号:
U447
DOI:
10.13409/j.cnki.jdpme.2019.01.010
文献标志码:
A
摘要:
基于数值仿真技术建立重型车辆-桥墩碰撞有限元模型,对不同参数下桥墩的瞬态响应和破坏模式进行参数分析,研究参数主要包括桥墩直径、碰撞速度、车辆碰撞偏心距、上部结构的有效参与质量和箍筋间距等; 讨论了规范建议的桥墩抗撞能力计算方法,并分析了其实际抗撞能力。研究结果表明,车辆高速撞击下桥墩的破坏形式以剪切破坏为主。由于车辆撞击下桥墩的动力效应十分显著,截面最大动态抗剪强度约是静态抗剪强度设计值的4倍。上部结构的参与质量对桥墩的破坏模式具有一定影响; 配箍率的增加对抗撞能力的贡献比较有限; 截面尺寸对桥墩抗撞能力的影响最为显著。20 ms 平均处理时的碰撞力峰值与桥墩截面抗剪需求比较一致。
Abstract:
The detailed vehicle and bridge pier finite element models were established wsing the numerical simulationtechnique.A parametric study was also conducted to analyze the transient response and failure mode of the piers, which included the pier diameter, the impact velocity, the off-center distance, the equivalent participating masses of the superstructure and stirrup spacing.The computational methods of impact capacity of the bridge pier suggested by codes were discussed, and the actual impact capacity of the bridge pier was also analyzed.The results show that the failure mode of the bridge pier under vehicle collision is mainly shear failure.Due to the dynamic effect of the impacted bridge pier is very significant, the dynamic capacity of the bridge pier is about four times the design value of the static shear capacity.The participating masses of the superstructure can influence the failure mode of the bridge pier to some degree.The effect of increasing stirrups ratios on the impact capacity is limited.However, the diameter of the bridge pier plays a dominated role in it's imapct capacity.The peak imapct force calculated using the 20 ms local average method is consistent with the shear demand of the bridge pier.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期:2017-10-13; 修回日期:2018-01-20 基金项目:国家自然科学基金项目(51438010)资助 作者简介:赵武超(1992-),男,博士研究生。主要从事工程结构冲击动力学研究。Email:zwuchao219@126.com 通讯作者:钱 江(1960-),男,教授,博导。主要从事工程结构数值仿真研究。Email:jqian@tongji.edu.cn
更新日期/Last Update: 2019-02-20