接触爆炸条件下聚脲涂层对RC基板层裂和贯穿的影响

郭士旭; 何翔; 刘飞; 杨建超; 陈经; 孙山川

doi:10.11883/bzycj-2025-0054

接触爆炸条件下聚脲涂层对RC基板层裂和贯穿的影响

doi: 10.11883/bzycj-2025-0054

郭士旭^{1, 2,},
何翔^{1, 3, ,},
刘飞^{1, 3},
杨建超^{1, 3},
陈经^{1, 3},
孙山川^{1, 3}

1.
军事科学院国防工程研究院，北京 100036
2.
洛阳理工学院，洛阳 471023
3.
目标易损性评估全国重点实验室，洛阳 471023

基金项目: 中原科技创新领军人才项目（No. 234200510016）

详细信息

作者简介:
郭士旭（1987－　），男，博士研究生，讲师，shixu@lit.edu.cn

通讯作者:
何　翔（1966－　），男，博士，研究员，XiangHe1396@163.com

中图分类号: O383
计量
- 文章访问数: 144
- HTML全文浏览量: 16
- PDF下载量: 75
- 被引次数: 0
出版历程
- 收稿日期: 2025-02-19
- 修回日期: 2025-04-16
- 网络出版日期: 2025-04-17

The effect of polyurea coatings on spalling and breach of reinforced concrete slabs under contact explosion

GUO Shixu^{1, 2
,},
HE Xiang^{1, 3
, ,},
LIU Fei^{1, 3},
YANG Jianchao^{1, 3},
CHEN Jing^{1, 3},
SUN Shanchuan^{1, 3}

1.
Defense Engineering Institute, AMS, PLA, Beijing 100036, China
2.
Luoyang Institute of Science and Technology, Luoyang 471023, China
3.
State Key Laboratory of Target Vulnerability Assessment, Luoyang 471023, China

摘要

摘要: 为研究聚脲涂层对钢筋混凝土（reinforced concrete，RC）基板层裂和贯穿的影响，分析了压缩波在混凝土-聚脲界面传播过程及混凝土层裂过程，提出背面喷涂聚脲RC基板的层裂解析模型。基于该模型，定量分析了聚脲涂层对RC基板临界层裂和贯穿的影响，提出无涂层RC板的贯穿预估经验方法可扩展应用于背面喷涂聚脲的RC基板，并通过学者们报道的接触爆炸试验进行验证。结果表明：聚脲涂层会对RC基板背面层裂过程产生影响，紧邻混凝土-聚脲界面的净应力波为压缩波，而在更深处的混凝土中，净应力波为拉伸波；聚脲涂层仅影响RC基板的首次层裂，首次层裂后的层裂过程与无涂层RC板相同；在发生临界层裂时，聚脲涂层提高了RC基板的临界层裂抗力，但层裂深度会增加；在发生贯穿时，聚脲涂层减少了RC基板的层裂次数，但对总层裂深度和贯穿的影响较小；无涂层RC板的贯穿预估经验方法可较好地预估背面喷涂聚脲RC基板的贯穿破坏。
- 接触爆炸 /
- 钢筋混凝土板 /
- 聚脲涂层 /
- 抗爆性能 /
- 解析模型 /
- 层裂 /
- 贯穿
Abstract: In recent years, polyurea-coated reinforced concrete (RC) slabs have been extensively studied both experimentally and numerically for structural strengthening against contact explosions. However, theoretical investigations remain limited, particularly concerning the impact of polyurea on the local damages of the RC substrates. In this paper, an analytical model based on stress wave propagation theory was proposed to (a) investigate the reflection of compression waves at the backside of the RC substrate slab and (b) predict the spalling depth. Utilizing this analytical model, a quantitative and detailed discussion was presented regarding the effect of the polyurea on the critical spalling and breach of the RC substrate slab. Furthermore, the applicability of the empirical breach prediction, originally developed for uncoated RC slabs, was validated through existing experiments to predict the breach of polyurea-coated RC substrate slabs. The results indicate that polyurea affects the spalling process of the RC substrate slabs. Specifically, the net stress wave adjacent to the concrete-polyurea interface is a compression wave, while it transitions to a tensile wave in the deeper concrete. Polyurea primarily impacts the first spall of the RC substrate slab; subsequent spalling processes after the first spall align with those observed in uncoated RC slabs. Upon the occurrence of critical spalling, polyurea enhances the critical spalling resistance of RC slabs, although it significantly increases the spalling depth. Conversely, when a breach occurs, polyurea reduces the number of spalls but minimally affects on the total spalling depth. Based on these findings, the empirical method for predicting breaches of uncoated RC slabs can effectively be applied to predict the breach of RC substrate slabs coated with polyurea. The test results from more than twenty contact explosion experiments are consistent with the predicted outcomes, thereby validating the effectiveness of the analytical model and providing a method for estimating the breach of polyurea-coated RC substrate slabs.
- contact explosion /
- reinforced concrete slab /
- polyurea coating /
- anti-blast performance /
- analytical model /
- spall /
- breach

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图 1 RC裸板和背面喷涂聚脲RC板中爆炸波作用过程

Figure 1. Shock wave action process in RC slabs and polyurea-coated RC slabs

下载: 全尺寸图片幻灯片

图 2 应力波在RC板背面的反射

Figure 2. Stress wave reflection on the backside of RC slab

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图 3 混凝土-空气界面处应力波反射和混凝土层裂

Figure 3. Stress wave reflection and concrete spalling at the concrete-air interface

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图 4 背面喷涂聚脲RC基板中应力波传播

Figure 4. Stress wave propagation in polyurea-coated RC slab

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图 5 混凝土-聚脲界面处应力波反射和混凝土层裂

Figure 5. Stress wave reflection and concrete spalling at the concrete-polyurea interface

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图 6 算例中RC裸板和背面喷涂聚脲RC板每次层裂的深度

Figure 6. Depth of each spalling for RC slab and polyurea-coated RC slab in the example

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图 7 背面喷涂聚脲RC板与RC裸板剖面形貌

Figure 7. Profile morphology of polyurea-coated and bare RC slabs

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表 1 接触爆炸试验中所用聚脲材料物理力学性能

Table 1. Physical and mechanical properties of polyurea used in contact explosion tests

聚脲材料来源	断裂伸长率/%	弹性模量/MPa	拉伸强度/MPa	密度/(g·cm⁻³)	粘结强度/MPa
文献[1]	120	161	/	1.120	>混凝土抗拉强度⁽¹⁾
文献[12,13]	451	84.01	22.6～25.4	0.977	5或混凝土破坏⁽²⁾
文献[14]	105	234	18	1.121	/
文献[9,16-21]	465	/	≥25	1.02	≥3.5
文献[15]	≥400	/	≥25	1.068	≥2.5
注：(1) 文献[1]未报道粘结强度，但作者指出粘结强度大于混凝土抗拉强度。 (2) 文献[12]指出底漆与混凝土基底附着强度可达5 MPa。常规C40混凝土的抗拉强度通常低于5 MPa，此处明确为5 MPa或混凝土破坏。

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表 2 背面喷涂聚脲RC板接触爆炸试验及基板贯穿预估结果

Table 2. Contact explosion tests and breach prediction results for polyurea-coated RC slabs

试验来源	试验编号	RC基板			聚脲涂层厚度/mm	TNT药量/kg	试验结果	Morishita公式预估结果
试验来源	试验编号	厚度/mm	配筋率⁽¹⁾/%	比例板厚T_z/(cm·g^-1/3)	聚脲涂层厚度/mm	TNT药量/kg	试验结果	Morishita公式预估结果
文献[1]	P-1	60	0.92	1.05	3.9	0.189	贯穿	贯穿
文献[17]	P1-1	150	1.13	1.78	4	0.6	贯穿	贯穿
	P1-2	150		1.50	4	1.0	贯穿	贯穿
	P2-1	150		1.23	6	1.8	贯穿	贯穿
	P2-2	150		1.19	6	2.0	贯穿	贯穿
	P3-1	150		1.19	8	2.0	贯穿	贯穿
	P3-2	150		1.15	8	2.2	贯穿	贯穿
	P4-1	150		1.12	10	2.4	贯穿	贯穿
	P4-2	150		1.09	10	2.6	贯穿	贯穿
	P5-1	150		1.04	12	3.0	贯穿	贯穿
	P5-2	150		0.98	12	3.6	贯穿	贯穿
文献[21]	RCP1	300	0.94	2.08	10	3.0	未贯穿	未贯穿
文献[21]	RCP2	300	0.94	1.75	10	5.0	未贯穿	贯穿
文献[15]	T1	200	0.90	2.15	2	0.8	未贯穿	未贯穿
	T2	200		2.15	4	0.8	未贯穿	未贯穿
	T3	200		2.15	6	0.8	未贯穿	未贯穿
	T4	200		2.15	8	0.8	未贯穿	未贯穿
	T5	200		2.15	10	0.8	未贯穿	未贯穿
文献[9]	T1	150	1.44	1.62	4.5	0.8	贯穿	贯穿
	T2	150		1.62	9.6	0.8	贯穿	贯穿
	T3	150		1.12	14.8	2.4	贯穿	贯穿
注：(1) Morishita等^[41]给出的配筋率由钢筋截面面积除以RC板截面面积计算得到。

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