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[1]张景峰,景 媛,张 楠,等.列车侧向撞击作用下U型梁碰撞荷载及 损伤演化分析[J].建筑科学与工程学报,2019,36(04):63-70.
 ZHANG Jing-feng,JING Yuan,ZHANG Nan,et al.Analysis on Impact Load and Damage Evolution of U-type Girder Under Train Lateral Collision[J].Journal of Architecture and Civil Engineering,2019,36(04):63-70.
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《建筑科学与工程学报》[ISSN:1673-2049/CN:61-1442/TU]

卷:
36卷
期数:
2019年04期
页码:
63-70
栏目:
出版日期:
2019-07-25

文章信息/Info

Title:
Analysis on Impact Load and Damage Evolution of U-type Girder Under Train Lateral Collision
文章编号:
1673-2049(2019)04-0063-08
作者:
张景峰1景 媛1张 楠2李小珍3张 岗1
(1. 长安大学公路学院,陕西西安 710064; 2. 北京交通大学土木建筑工程学院,北京 100044; 3. 西南交通大学土木工程学院,四川成都 610031)
Author(s):
ZHANG Jing-feng1 JING Yuan1 ZHANG Nan2 LI Xiao-zhen3 ZHANG Gang1
(1. School of Highway, Chang'an University, Xi'an 710064, Shaanxi, China; 2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China; 3. School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, Sichuan, China)
关键词:
列车脱轨 U型梁 碰撞分析 碰撞荷载 损伤演化
Keywords:
[WT]train derailment U-type girder collision analysis impact load damage evolution
分类号:
U24
DOI:
-
文献标志码:
A
摘要:
为研究脱轨列车撞击U型梁碰撞荷载变化规律及U型梁损伤演化过程,采用显式动力分析方法对列车以不同质量、速度和角度撞击U型梁进行仿真计算,对比分析列车碰撞荷载时程、峰值力、平均力以及荷载冲量,基于非线性时程分析对U型梁在碰撞荷载下的损伤特征和演化进行了研究。结果表明:列车碰撞荷载时程呈现两阶段特征,第一阶段碰撞荷载达到峰值但持时较短,第二阶段持时较长但碰撞荷载处于较低水平,荷载总持时为35~60 ms; 列车碰撞质量对碰撞荷载影响不显著,随着碰撞速度和碰撞角度增大,碰撞荷载峰值力及冲量上升明显且呈线性增长趋势,随着碰撞速度的增大,平均碰撞力上升较为有限,但随碰撞角度增大而增大,碰撞荷载峰值力与平均碰撞力的比值基本都超过2.5,最大达到3.4; U型梁碰撞损伤首先发生于腹板和底板,而后逐渐发展至翼缘与腹板过渡处,最终腹板上部发生严重损伤,损伤区域主要集中于腹板及腹板和底板连接处,U型梁的腹板翼缘在碰撞后发生明显的塑性侧向变形; 对受损伤的薄弱区域,在设计时应重点关注。
Abstract:
For the purpose of investigating the impact load characteristic and damage evolution process of U-type girder under derailed train collision, the numerical simulation was conducted under various impact masses, velocities and angles of vehicle through explicit dynamic analysis. The impact load time histories, as well as the peak values, mean values and impulses of impact loads were compared and analyzed. The damage characteristic and evolution of U-type girder were also studied and discussed under impact loads through nonlinear transient analysis. The analysis results demonstrate that the impact load presents a two-phase character. In the 1st phase, the impact load reaches its peak value instantly and the load duration is relatively short. Whereas the impact load is at a lower level and has a longer duration in the 2nd phase. The overall duration of impact loads ranges from 35 ms to 60 ms. The impact loads are less influenced by the vehicle impact mass, while the peak values and impact impulses of impact loads go up significantly and linearly with the increases of impact velocity and angle. The impact angle affects the mean value of impact load with a more prominent way than the impact velocity. The peak impact loads almost for all cases are 2.5 times larger than the mean impact loads with respect to time, and a maximum ratio of 3.5 can be obtained. The damage of U-type girder occurs at the web and bottom plate firstly, and then extends to transition zone of web and flange. The upper part of web suffers severe damage finally. The damage of U-type girder under impact load mainly occurs at the web, as well as the connection of web and bottom plate. The flange of U-type girder shows significant plastic lateral deformation under impact load. The weak region that suffers damage should be paid significant attention to the structure design.

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备注/Memo

备注/Memo:
收稿日期:2018-10-16
基金项目:(国家自然科学基金项目(51808048,51878057); 陕西省自然科学基础研究计划项目(2018JM5018,2018JQ5093); 中央高校基本科研业务费专项资金项目(CHD300102219218)
作者简介:张景峰(1989-),男,陕西西安人,讲师,工学博士,E-mail:jfzhang@chd.edu.cn。
更新日期/Last Update: 2019-07-26