POZD涂覆波纹钢加固钢筋混凝土板抗爆性能

doi:10.12382/bgxb.2022.0024

摘要/Abstract

摘要：

为研究聚异氰氨酸酯噁唑烷聚合物高分子材料(POZD)涂覆波纹钢加固钢筋混凝土板的抗爆性能,对波纹钢加固钢筋混凝土板和POZD涂覆波纹钢加固钢筋混凝土板展开接触爆炸试验,并对其破坏特征进行对比分析。采用LS-DYNA软件进行有限元模拟,研究POZD涂覆波纹钢加固钢筋混凝土板的破坏模式和破坏特征,分析装药量局部毁伤效应的影响,并从应力波传播的角度揭示POZD涂覆波纹钢加固钢筋混凝土板的破坏机理。试验和数值结果表明:在接触爆炸作用下,POZD涂覆波纹钢加固钢筋混凝土板呈现4种破坏模式(结构迎爆面开坑;结构迎爆面开坑,背爆面混凝土层裂和POZD涂覆波纹钢鼓包变形;混凝土板贯穿破坏,POZD涂覆波纹钢严重鼓包变形;整个结构被贯穿破坏穿破坏);在波纹钢加固钢筋混凝土板背爆面涂覆POZD涂层能有效加强结构的抗爆性能。研究成果可为实际工程应用和防护工程提供参考依据。

关键词: 接触爆炸, POZD涂覆波纹钢, 抗爆性能, 破坏模式

Abstract:

In order to investigate the blast resistance of reinforced concrete slabs strengthened with polyisocyanate oxazodone (POZD) coated corrugated steel, contact explosion tests were conducted on reinforced concrete slabs strengthened with corrugated steel and reinforced concrete slabs strengthened with POZD coated corrugated steel, and the damage characteristics were compared and analyzed. Finite element simulations were performed with LS-DYNA software to study the failure mode and failure characteristics. The influence of the damage effect of charge mass was analyzed. The failure mechanism of the proposed structure was revealed from the perspective of stress wave propagation. The test and numerical results showed that there were four failure modes for reinforced concrete slabs strengthened with POZD coated corrugated steel (The front of the structure produces a crater; the front blasting surface of the structure is cratered, the back blasting surface concrete is spalled and the POZD coated corrugated steel bulge deformation; penetration failure of concrete slab, serious bulging deformation of POZD coated corrugated steel; the entire structure was destroyed throughout), and that coating POZD on the back face (explosion receiving face) of the structure can enhance explosion resistance performance. The findings of this study can provide the basis for practical engineering application and protection engineering.

Key words: contact explosion, POZD coated corrugated steel, blast resistance performance, failure mode

杨光瑞, 汪维, 杨建超, 汪剑辉, 王幸. POZD涂覆波纹钢加固钢筋混凝土板抗爆性能[J]. 兵工学报, 2023, 44(5): 1374-1383.

YANG Guangrui, WANG Wei, YANG Jianchao, WANG Jianhui, WANG Xing. Blast Resistance of Reinforced Concrete Slabs Strengthened with POZD Coated Corrugated Steel[J]. Acta Armamentarii, 2023, 44(5): 1374-1383.

图/表 25

图1 模型结构示意图

Fig.1 Diagram of model structure

图2 试件几何尺寸和配筋方式

Fig.2 Dimensions and reinforcement layout of specimen

图3 试验装置示意图

Fig.3 Diagram of test device

表1 试验工况

Table 1 Test program

序号	模型编号	底面内衬材料/mm		TNT药量/g	破坏状态
序号	模型编号	钢板	POZD	TNT药量/g	破坏状态
1	STB	3	0	3000	波纹钢板破损
2	SPB	3	12	4000	波纹面POZD涂层无破损

图4 TNT的形状和尺寸

Fig.4 Shape and size of TNT

图5 三维模型结构简图

Fig.5 Diagram of three-dimensional model structure

图6 1/4模型网格划分图

Fig.6 Diagram of 1/4 model meshing

图7 不同应变率下聚脲的应力-应变曲线

Fig.7 Stress-strain curves of polyurea at various strain rates

表2 POZD材料参数

Table 2 POZD material parameters

E/GPa	ν	ρ/(g·cm^-3)	σ_Y/MPa	E_t/MPa
230	0.4	1.19	1.38	3.5

表3 混凝土材料参数

Table 3 Concrete material parameters

c/(km·s^-1)	ν	f_c/MPa	ρ/(g·cm^-3)	失效参数
2.82	0.19	20	2.6	0.01

表4 波纹钢材料参数

Table 4 Corrugated steel material parameters

E/GPa	ν	ρ/(g·cm^-3)	σ_Y/MPa	C/s^-1	P
210	0.3	7.86	240	13.8	5

表5 钢筋材料参数

Table 5 Rebar material parameters

E/GPa	ν	ρ/(g·cm^-3)	γ/GPa	β
210	0.3	7.86	0.40	1

表6 TNT炸药材料参数

Table 6 Explosive material parameters

e₀/ (MJ·kg^-1)	A/ GPa	B/ GPa	R₁	R₂	V₀	ω	ρ/ (g·cm^-3)
7.0	371.2	3.23	4.15	0.95	1.0	0.3	1.610

表7 空气材料参数

Table 7 Air material parameters

e₀/(MJ·kg^-1)	V₀	γ	ρ/(g·cm^-3)
2.068×10⁵	1.00	1.4	1.293

图8 STB试件试验与数值结果对比

Fig.8 Comparison of experimental and numerical results of STB specimen

表8 STB试件试验与数值结果

Table 8 Test and numerical results of STB specimen

试验与数值结果	爆坑直径/mm	冲切道直径/mm	鼓包长径/mm	鼓包短径/mm	鼓包高度/mm
试验结果	300	141	750	300	105
数值结果	280	136	742	289	130

图9 SPB试件试验与数值结果对比

Fig.9 Comparison of experimental and numerical results of SPB specimen

表9 SPB试件试验与数值结果

Table 9 Test and numerical results of SPB specimen

试验与数值结果	爆坑直径/mm	冲切道直径/mm	鼓包长径/mm	鼓包短径/mm	鼓包高度/mm
试验结果	323	162	963	352	91
数值结果	358	186	997	376	96

图10 STB试件数值结果(4000g TNT)

Fig.10 Numerical results of STB specimen (4000g TNT)

表10 试件损伤分析

Table 10 Specimen damage analysis

试件编号	装药量/g	迎爆面开坑直径/mm	混凝土冲切道直径/mm	背爆面鼓包长径/mm	背爆面鼓包短径/mm	背爆面鼓包高度/mm	整体性	是否能继续承载
STB	4 000	361	191	/	/	/	差	否
SPB	4 000	358	186	997	376	96	好	能

图11 波纹钢加固RC板应力波传播图

Fig.11 Diagram of stress wave propagation of RC slabs strengthened with corrugated Steel

图12 POZD涂覆波纹钢加固RC板应力波传播图

Fig.12 Diagram of stress wave propagation of RC slabs strengthened with POZD coated corrugated Steel

图13 不同装药量下的毁伤图

Fig.13 Diagram of damage under different charge masses

图14 破坏等级

Fig.14 Damage levels

表11 数值结果

Table 11 Numerical results

工况编号	装药量/ kg	钢板厚度/mm	POZD厚度/mm	最大跨中位移/mm	破坏模式
SPB1	1	3	12	/	正面开坑
SPB2	2	3	12	42	背面层裂
SPB3	3	3	12	73	爆炸贯穿
SPB4	4	3	12	96	爆炸贯穿
SPB5	5	3	12	116	爆炸贯穿
SPB6	6	3	12	/	爆炸冲切

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