Experiment and Numerical Simulation of Explosion Resistance Performance of Main Girder of Self-anchored Suspension Bridge Coated with Polyurea

Guangpan ZHOU; Rong WANG; Mingyang WANG; Jianguo DING; Guokai ZHANG

doi:10.12382/bgxb.2023.0863

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Experiment and Numerical Simulation of Explosion Resistance Performance of Main Girder of Self-anchored Suspension Bridge Coated with Polyurea

更新时间：2025-08-18

- Experiment and Numerical Simulation of Explosion Resistance Performance of Main Girder of Self-anchored Suspension Bridge Coated with Polyurea
- Acta Armamentarii Vol. 44, Issue S1, Pages: 9-25(2023)
- 作者机构：
  
  1. 南京理工大学安全科学与工程学院, 江苏南京 210094
  2. 南京理工大学理学院, 江苏南京 210094
  3. 南京理工大学机械工程学院, 江苏南京 210094
  4. 陆军工程大学爆炸冲击防灾减灾国家重点实验室, 江苏南京 210007
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2023.0863
  CLC：
- Received：05 September 2023，
  
  Published Online：03 January 2024，
  
  Published：08 December 2023
- 稿件说明：
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Guangpan ZHOU, Rong WANG, Mingyang WANG, et al. Experiment and Numerical Simulation of Explosion Resistance Performance of Main Girder of Self-anchored Suspension Bridge Coated with Polyurea[J]. Acta Armamentarii, 2023, 44(S1): 9-25.
DOI：

Guangpan ZHOU, Rong WANG, Mingyang WANG, et al. Experiment and Numerical Simulation of Explosion Resistance Performance of Main Girder of Self-anchored Suspension Bridge Coated with Polyurea[J]. Acta Armamentarii, 2023, 44(S1): 9-25. DOI： 10.12382/bgxb.2023.0863.

摘要

为研究爆炸荷载作用下涂覆聚脲混凝土自锚式悬索桥主梁的抗爆防护效果

以山东湖南路大桥为背景

通过试验和数值模拟结合的方法对自锚式悬索桥主梁的爆炸破坏特征和动力响应进行研究。采用2发3kg TNT和1发5kg TNT药柱

开展1∶3缩尺节段箱梁试件的2发单次爆炸试验和1发重复爆炸试验

分别编号为G(未涂覆聚脲箱梁)、PCG(涂覆聚脲箱梁首次起爆)、PCGR(涂覆聚脲箱梁二次起爆)

试件顶面涂覆聚脲厚度为1.5mm。通过LS-DYNA软件进行试件爆炸响应数值模拟及验证。研究结果表明

聚脲涂层可有效增强混凝土箱梁的抗爆性能

3kg TNT在中间箱室上方0.4m处首次起爆时

试件G中间箱室顶板形成贯穿性椭圆形破洞;试件PCG中间箱室顶板未贯穿

仅发生轻微的局部凹陷;5kg TNT二次起爆后

试件PCGR中间箱室顶板出现近似圆形贯穿性破洞

1号和3号箱室在支撑处出现明显裂缝。涂覆聚脲后自锚式悬索桥主梁抗爆性能得到至少20%的提升

300kg、500kg、800kg、1000kg TNT当量作用下

未涂覆聚脲主梁顶板混凝土均出现贯穿性破洞;涂覆聚脲后仅在TNT当量为1000kg时发生轻微贯穿。

Abstract

The anti-explosion protection effect of the girder of self-anchored suspension bridge coated with polyurea under explosion loads is studied by taking Hunan Road Bridge in Shandong Province as the background. The failure characteristics and dynamic response of the girder of self-anchored suspension bridge under explosion loads are studied through a combination of experiments and numerical simulations. Two sets of 3kg TNT grains and one set of 5kg TNT grain are used to conduct two single explosion tests and one repeated explosion test on segmental box girder specimens made at a 1∶3 scale. The specimens are numbered as G (uncoated-polyurea box girder)

PCG (coated-polyurea girder with first detonation)

and PCGR (coated-polyurea girder with second detonation)

respectively. The polyurea thickness at the top surface of the specimen is 1.5mm. The explosion response of specimen were numerically simulated and verified using LS-DYNA software. The results indicate that the polyurea coating can effectively enhance the anti-explosion performance of concrete girder. When the first explosion of 3kg TNT occurred at 0.4m above the middle box chamber

a penetrating elliptical hole was formed on the top plate of the middle box chamber of specimen G. The top plate of the middle chamber of PCG was not penetrated

and only a slight local dent on it occurred. After the secondary detonation of 5kg TNT

a nearly circular penetrating hole appeared on the top plate of the middle chamber of PCGR

the cracks appeared at the supports in the chambers no. 1 and no. 3. After coating with polyurea

the anti-explosion performance of the girder of the self-anchored suspension bridge has been improved by at least 20%. Under the actions of TNT equivalents of 300kg

500kg

800kg

and 1000kg

the penetrating holes appear in the top plate concrete of the girder without polyurea. After coating with polyurea

only slight penetration occurs when the TNT equivalent is 1000kg.

关键词

Keywords

references

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