接触爆炸下聚脲/钢筋混凝土厚板复合结构的抗爆性能

徐赵威; 汪维; 李奕硕; 张仲昊; 张丛琨

doi:10.11883/bzycj-2024-0083

接触爆炸下聚脲/钢筋混凝土厚板复合结构的抗爆性能

doi: 10.11883/bzycj-2024-0083

宁波大学冲击与安全工程教育部重点实验室，浙江宁波 315211

基金项目: 国家自然科学基金（11302261，11972201）

详细信息

作者简介:
徐赵威（1999－　），男，硕士研究生，2211090196@nbu.edu.cn

通讯作者:
汪　维（1983－　），男，博士，教授，wangwei7@nbu.edu.cn

中图分类号: O383
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- 被引次数: 0
出版历程
- 收稿日期: 2024-03-28
- 修回日期: 2024-06-05
- 网络出版日期: 2024-06-06

Blast resistance of polyurea/reinforced concrete thick slab composite structures under contact explosion

Key Laboratory of Impact and Safety Engineering, Ministry of Education, Ningbo University, Ningbo 315211, Zhejiang, China

摘要

摘要: 为了研究聚脲/钢筋混凝土厚板复合结构的抗爆性能，对聚脲/钢筋混凝土厚板复合结构开展不同装药量下的接触爆炸实验，并对整体及局部的破坏特征进行分析。利用LS-DYNA有限元仿真软件研究聚脲/钢筋混凝土厚板复合结构的损伤过程及机理，并进一步分析了聚脲/钢筋混凝土厚板复合结构的破坏模式及特征。实验及有限元结果表明：接触爆炸荷载作用下的聚脲/钢筋混凝土厚板复合结构呈现6种破坏模式（正面成坑；层裂破坏；层裂鼓包；震塌破坏，聚脲涂层鼓包大变形；爆炸贯穿，聚脲涂层严重鼓包变形；贯穿和撕裂破坏）；在钢筋混凝土厚板背面涂覆聚脲有效增强了复合结构的抗爆性能。研究成果可为实际应用下的聚脲/钢筋混凝土厚板复合结构抗爆设计防护提供参考依据。
- 接触爆炸 /
- 钢筋混凝土厚板 /
- 聚脲涂层 /
- 抗爆性能 /
- 破坏模式
Abstract: Reinforced concrete slabs, as the main load-bearing components in the structure of construction projects, are very likely to suffer serious damage in explosive accidents, while polyurea elastomers, with their better anti-blast and anti-impact properties, have been widely used in the field of protective engineering. It is well known that the mechanical properties and deformation mechanisms of thin slabs in the range from 100 mm to 250 mm and thick concrete slabs above 250 mm are not the same, and the thickness of reinforced concrete substrates studied so far is generally concentrated in the range from 100 mm to 250 mm, and there are relatively few studies on thick slabs of polyurea-coated reinforced concrete with a slab thickness of 250 mm or more. In order to study the anti-blast performance of the polyurea/reinforced concrete thick slab composite structure, firstly, the contact explosion tests were carried out on the polyurea/reinforced concrete thick slab composite structure with different charges, while the overall and local damage characteristics were analyzed. Secondly, numerical simulations were carried out using LS-DYNA finite element simulation software to verify the correctness of the numerical model by comparing with the experimental results. Based on LS-DYNA finite element simulations, the damage process of polyurea/reinforced concrete thick plate composite structure and the evolution of shock wave inside the polyurea/reinforced concrete thick plate were investigated, which revealed the anti-blast mechanism of the polyurea coating, and further analyzed the damage mode and damage characteristics of the polyurea/reinforced concrete thick plate composite structure. The test and finite element results showed that the polyurea/steel-reinforced concrete composite structure exhibited six damage modes under the contact explosion load (i.e., crate; spall; spall and bulge; threshold spall, bulging deformation of the polyurea coating; severe spall, serious bulging deformation of the polyurea coating; perforation). The investigation also demonstrated that the backside polyurea-coated reinforced concrete thick slabs effectively improved the anti-blast performance of the composite structure. The results of the study can provide a basis and reference for the design of blast resistance of polyurea/reinforced concrete thick slab composite structures.
- contact explosion /
- reinforced concrete thick slab /
- polyurea coating /
- anti-blast performance /
- damage mode

HTML全文

图 1 聚脲/钢筋混凝土厚板复合结构示意图

Figure 1. Schematic diagram of a polyurea/reinforced concrete thick plate composite structure

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图 2 试件配筋方式

Figure 2. Specimen reinforcement pattern

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图 3 接触爆炸实验装置

Figure 3. The contact explosion test device

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图 4 有限元模型

Figure 4. Finite element model

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图 5 3 kg炸药接触爆炸下RCP1实验与数值结果对比

Figure 5. Comparison of experimental and numerical results for RCP1 under 3-kg-explosive contact explosion

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图 6 5 kg炸药接触爆炸下RCP2实验结果与数值结果的对比

Figure 6. Comparison of experimental and numerical results for RCP2 under 5-kg-explosvie contact explosion

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图 7 RCP1试件迎爆面（上）及背爆面（下）损伤过程

Figure 7. Damage process of RCP1 specimen on the face (top) and back (bottom) of the blast surface

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图 8 接触爆炸荷载下的压力场分布

Figure 8. Distribution of pressure field under contact blast loading

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图 9 聚脲涂覆RC板应力波传播

Figure 9. Stress wave propagation in polyurea-coated RC slabs

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图 10 聚脲层内加载与卸载波相互作用过程

Figure 10. Interaction of loading and unloading waves within a polyurea layer

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图 11 不同药量下聚脲/钢筋混凝土厚板复合结构的破坏模式

Figure 11. Damage modes of polyurea/reinforced concrete thick slab composite structures under different dosages

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图 12 聚脲/钢筋混凝土厚板复合结构的破坏模式

Figure 12. Damage modes of polyurea/reinforced concrete thick slab composite structures

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表 1 实验工况

Table 1. Test conditions

工况	模型	TNT药量/kg	聚脲涂层厚度/mm	涂覆位置	破坏形态
1	RCP1	3	10	背面	未贯穿，背面最大鼓起高度90 mm
2	RCP2	5	10	背面	未贯穿，背面最大鼓起高度172 mm

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表 2 实验与数值计算结果对比

Table 2. Comparison of experimental and numerical calculation results

模型	实验				模拟				模拟结果与实验结果的相对误差/%
模型	D/mm	H/mm	d/mm	h/mm	D/mm	H/mm	d/mm	h/mm	D	H	d	h
RCP1	738	170	1250	90	700	160	1200	84	5.15	5.88	4.00	6.67
RCP2	760	210	1270	172	720	190	1250	164	5.26	9.52	1.57	4.65

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表 3 数值结果

Table 3. Numerical results

工况编号	装药量/kg	聚脲厚度/mm	比例厚度/(m∙kg^−1/3)	破坏模式
RCP-1	0.5	10	0.378	正面成坑
RCP-2	1.0	10	0.300	正面成坑
RCP-3	1.5	10	0.262	层裂破坏
RCP-4	2.0	10	0.238	层裂鼓包
RCP-5	2.5	10	0.221	层裂鼓包
RCP-6	3.0	10	0.208	层裂鼓包
RCP-7	3.5	10	0.198	层裂鼓包
RCP-8	4.0	10	0.189	层裂鼓包
RCP-9	4.5	10	0.182	层裂鼓包
RCP-10	5.0	10	0.175	层裂鼓包
RCP-11	5.5	10	0.170	层裂鼓包
RCP-12	6.0	10	0.165	层裂鼓包
RCP-13	6.5	10	0.161	层裂鼓包
RCP-14	7.0	10	0.157	层裂鼓包
RCP-15	7.5	10	0.153	层裂鼓包
RCP-16	8.0	10	0.150	层裂鼓包
RCP-17	8.5	10	0.147	震塌破坏
RCP-18	9.0	10	0.144	震塌破坏
RCP-19	9.5	10	0.142	震塌破坏
RCP-20	10.0	10	0.139	震塌破坏
RCP-21	10.5	10	0.137	震塌破坏
RCP-22	11.0	10	0.135	爆炸贯穿
RCP-23	11.5	10	0.133	爆炸贯穿
RCP-24	12.0	10	0.131	贯穿和撕裂

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