Experimental and Numerical Investigation on the Damage Effects of Concrete Pier under Contact Explosion

Gengxin KANG; Haichun YAN; Yadong ZHANG; Mingjun LIU; Likai HAO

doi:10.12382/bgxb.2022.0397

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Experimental and Numerical Investigation on the Damage Effects of Concrete Pier under Contact Explosion

更新时间：2025-08-18

- Experimental and Numerical Investigation on the Damage Effects of Concrete Pier under Contact Explosion
- Acta Armamentarii Vol. 45, Issue 1, Pages: 144-155(2024)
- 作者机构：
  
  1. 陆军工程大学国防工程学院, 江苏南京 210007
  2. 东南大学爆炸安全防护教育部工程研究中心, 江苏南京 211189
  3. 陆军工程大学野战工程学院, 江苏南京 210007
- 作者简介：
- 基金信息：
- DOI：10.12382/bgxb.2022.0397
  CLC：
- Received：18 May 2022，
  
  Published Online：06 February 2024，
  
  Published：30 January 2024
- 稿件说明：
移动端阅览
Gengxin KANG, Haichun YAN, Yadong ZHANG, et al. Experimental and Numerical Investigation on the Damage Effects of Concrete Pier under Contact Explosion[J]. Acta Armamentarii, 2024, 45(1): 144-155.
DOI：

Gengxin KANG, Haichun YAN, Yadong ZHANG, et al. Experimental and Numerical Investigation on the Damage Effects of Concrete Pier under Contact Explosion[J]. Acta Armamentarii, 2024, 45(1): 144-155. DOI： 10.12382/bgxb.2022.0397.

摘要

为研究混凝土墩在炸药接触爆炸作用下的破坏效应

分别采用K & C模型、HJC模型、RHT模型和Kong-Fang模型对混凝土墩体的破坏效果进行数值模拟

讨论破坏形态、裂缝数量、块体数量、芯部残高和侧面残高的变化并与试验对比。研究结果表明

4种模型都能有效地预测混凝土墩体的破坏形态:在顶部集团装药爆炸作用下

混凝土墩体上半部分和下半部分表现为不同的破坏形式

上半部分为破碎性破坏

形成大量1~10cm为主的碎块;下半部分为破裂性破坏

开裂为有限数量的块体;其中Kong-Fang模型能够更加可靠地预测破裂区块体的数量和残高。残留块体破坏特征参数随装药量的变化的研究结果表明

随着装药量从1.0kg增加到4.5kg

块体的数量增加到25

块体底面尺寸由40cm减小为15cm

约为混凝土底边尺寸的1/5~1/25;装药量从1.0kg增加到3.5kg时芯部残高及侧面残高减小较快

在装药量增加到4.0kg后

分别稳定在40cm及28cm左右处

不再明显变化。基于以上研究结果

拟合了块体数量、芯部残高及侧面残高随装药量的变化公式

为有效实施混凝土墩体爆破作业提供了参考。

Abstract

The damage effects of concrete pier under the action of contact explosion are studied. Firstly

the K&C

HJC

RHT and Kong-Fang models are respectively used to numerically calculate the failure effects of concrete pier. The failure modes

the number of cracks

the number of broken blocks and the change in residual heights of core and side are discussed and compared with the test results. The results show that the four models can effectively predict the failure modes of concrete pier: the upper half and lower half of concrete pier show different failure modes under the explosion of the top group charge. The upper half is broken and damaged to form a large number of fragments ranging from 1cm to 10cm in diameter

and the lower half is ruptured to be cracked into a limited number of blocks. Kong-Fang model can more reliably predict the number and residual heights of broken blocks. On this basis

the variation of damage characteristic parameters of residual blocks with the charge volume was studied. It is found that

with the increase in the charge from 1.0kg to 4.5kg

the number of broken blocks increases to 25 pieces

and the size of the bottom surface of a block decreases from 40cm to 15cm

which is about 1/5-1/25 of the size of concrete pier in the broken part. The core residual height and side residual height decrease rapidly when the charge volume increases from 1.0kg to 3.5kg

and are stabilized at 40cm and 28cm

respectively

after the charge of 4kg

and no longer changed significantly. Based on the above research results

the formulas for the changes in the number of blocks

the residual height of the core and the residual height of the side are fitted. The research in this paper provides a basis for the effective implementation of concrete pier blasting operations.

关键词

Keywords

references

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