侵彻爆炸作用下钢纤维混凝土结构的破坏模式

杨石刚; 罗泽; 许继恒; 方秦; 杨亚; 徐国琳; 汤俊杰

doi:10.11883/bzycj-2023-0003

侵彻爆炸作用下钢纤维混凝土结构的破坏模式

doi: 10.11883/bzycj-2023-0003

陆军工程大学国防工程学院，江苏南京 210094

基金项目: 江苏省自然科学基金（BK20180081）；国家重点研发计划（2020TFB20103300）

详细信息

作者简介:
杨石刚（1985－　），男，博士，副教授，youngshg@126.com

通讯作者:
罗　泽（1997－　），男，硕士研究生，luoze0114@126.com

中图分类号: O389
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- 文章访问数: 280
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- 被引次数: 0
出版历程
- 收稿日期: 2023-01-03
- 修回日期: 2023-10-24
- 网络出版日期: 2023-12-12
- 刊出日期: 2024-01-11

Failure modes of concrete structure under penetration and explosion

National Defense Engineering College, Army Engineering University of PLA, Nanjing 210094, Jiangsu, China

Funds: LIANG B. Research on projectile penetration into bounded concrete target [D]. Beijing: China Academy of Engineering Physics, 2004: 14-73.

摘要

摘要: 基于大口径发射平台进行了155 mm杀伤爆破榴弹毁伤钢纤维混凝土结构的试验，得到了打击不同位置时结构的破坏情况；结合LS-DYNA数值模拟，分析了不同打击位置和不同命中速度下钢纤维混凝土结构的毁伤效应，讨论了侵彻与爆炸联合作用下钢纤维混凝土结构的损伤过程和破坏模式。结果表明：钢纤维混凝土结构在155 mm榴弹作用下，配置钢筋的顶板和侧墙发生较轻的爆炸成坑破坏，无配筋的前墙发生严重的爆炸震塌破坏。SPG (smooth particle Galerkin method)-结构化ALE (arbitrary Lagrange-Euler)(S-ALE)流固耦合算法能够有效预测钢筋混凝土结构在侵彻和爆炸共同作用下的损伤发展过程和破坏模式。大口径弹体侵彻有限边界靶的加速度时程曲线特征为突增骤减单峰值形式，弹体速度呈现先快速降低后缓慢减小的特征；靶标在基于侵彻损伤的爆炸作用下，主要破坏模式为混凝土块大量崩塌和裂缝的生长，且随着侵彻速度的增加，爆炸造成的毁伤由局部破坏向结构整体破坏发展；混凝土破碎区内，垂直于弹体的钢筋在侵彻作用下达到屈服，板顶和板底的钢筋在爆炸后达到屈服。
- 钢纤维混凝土结构 /
- 侵彻 /
- 爆炸 /
- 破坏模式
Abstract: Based on the large caliber launch platform, the experiment of 155 mm high explosive bomb damaging steel fiber reinforced concrete structure was carried out, and the damage feature of the structure being struck at different positions was obtained. Combined with LS-DYNA numerical simulation, the damage effects of steel fiber reinforced concrete structures under different impact positions and different hit speeds are analyzed, and the damage process and failure modes of steel fiber reinforced concrete structures under the combined action of penetration and explosion are discussed. The results show that under the action of 155 mm high explosive bomb, the roof and side wall of steel fiber reinforced concrete structure have a relatively light explosion pit damage, and the front wall without reinforcement has a serious explosion collapse damage. SPG (smooth particle Galerkin method)-structured ALE (arbitrary Lagrange-Euler) (S-ALE) fluid-structure coupling algorithm can effectively predict the damage development process and failure mode of reinforced concrete structures under the combined action of penetration and explosion. The acceleration time-history curve of large caliber projectile penetrating finite boundary targets is characterized by sudden increase and sudden decrease of single peak, and the projectile velocity is characterized by rapid decrease at first and then slow decrease. The main failure modes of the target under the explosion based on penetration damage are massive collapse and crack growth of concrete blocks. With the increase of penetration speed, the damage caused by explosion develops from local damage to overall failure of the structure. In the concrete crushing zone, the reinforcement perpendicular to the projectile body will yield under the penetration effect, and the reinforcement at the top and bottom of the plate will yield under the explosion.
- steel fiber concrete structure /
- penetration /
- explosion /
- destruction mode

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图 1 靶体及钢筋分布（单位：mm）

Figure 1. Target and reinforcement distribution (unit: mm)

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图 2 弹体结构及尺寸（单位：mm）

Figure 2. Structure and size of projectile (unit: mm)

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图 3 试验布局图

Figure 3. Test layout

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图 4 弹着点位置(单位：mm)

Figure 4. Impact point position (unit: mm)

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图 5 靶标破坏形态(单位：mm)

Figure 5. Target damage pattern (unit: mm)

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图 6 有限元模型

Figure 6. Finite element model

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图 7 前靶和背靶破坏模式与数值模拟结果对比（单位：m）

Figure 7. Comparison failure modes of the front target and back target with numerical simulation result (unit: m)

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图 8 钢筋损伤对比

Figure 8. Comparison of reinforcement damage

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图 9 试验弹、靶尺寸及钢筋分布示意图^[21]

Figure 9. Diagram of projectile, target size and reinforcement distribution^[21]

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图 10 试验与数值模拟毁伤范围对比

Figure 10. Comparison of damage range between test and numerical simulation

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图 11 靶标全模型(单位：mm)

Figure 11. Complete target model (unit: mm)

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图 12 侵彻损伤发展过程（v=900 m/s）

Figure 12. Damage processes of penetration（v=900 m/s）

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图 13 加速度时程曲线对比

Figure 13. Acceleration-time curves comparison

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图 14 速度时程曲线

Figure 14. Velocity-time curves

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图 15 侵彻与爆炸联合作用下靶标毁伤发展过程（v=900 m/s）

Figure 15. Development of target damage under the combined penetration and explosion（v=900 m/s）

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图 16 靶标顶面损伤分布

Figure 16. Damage distribution on the top surface of target

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图 17 侵彻和爆炸过程钢筋的破坏

Figure 17. Failure of reinforcement during penetration and explosion

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图 18 顶板钢筋单元位置

Figure 18. Position of reinforcement elements

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图 19 不同位置钢筋单元等效应力时程曲线

Figure 19. Von Mises stress histories of reinforcement elements at different position

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表 1 CF60钢纤维混凝土K＆C模型参数^[20]

Table 1. K&C model parameters of CF60 steel fiber reinforced concrete^[20]

ρ/(kg·m⁻³)	f_c/MPa	v	f_t/MPa	RSIZE	UFC	a₀	a_0y	a_0f
2440	65	0.24	4.95	39.37	1.45×10⁻⁴	−6.5×10⁷	1.703×10⁷	0

a₁	a_1y	a_1f	a₂	a_2y	a_2f	b₁	b₂	b₃
0.481	0.726	0.476	1.57×10⁻⁹	4.77×10⁻⁹	2.31×10⁻⁹	0.75	0.2	0.018
注：f_c为抗压强度，f_t为抗拉强度；v为泊松比。

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表 2 炸药及状态方程参数

Table 2. Explosive and equation of state parameters

ρ/(kg·m⁻³)	D/(m·s⁻¹)	p_C-J/GPa	A/GPa	B/MPa	R₁	R₂	ω	E₀/(GJ·m⁻³)
1630	6930	21	373	3747	4.15	0.9	0.35	7
注：A、B、R₁、R₂、ω为炸药参数，E₀为初始内能。

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表 3 空气及状态方程参数

Table 3. Air and equation of state parameters

ρ/(kg·m⁻³)	C₀	C₁	C₂	C₃	C₄	C₅	C₆	E₀/(kJ·m⁻³)	V₀
1.29	0	0	0	0	0.4	0	0	250	1
注：C₀～C₆为状态方程系数，E₀为初始内能，V₀为初始相对体积。

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表 4 数值模拟计算工况

Table 4. Numerical simulation calculation condition

侵彻速度/ (m·s⁻¹)	工况
侵彻速度/ (m·s⁻¹)	顶板（着弹点1）	侧墙（着弹点2）	前墙（着弹点3）
300	300-1	300-2	300-3
600	600-1	600-2
900	900-1	900-2

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表 5 侵彻深度的数值模拟结果

Table 5. Numerical simulation results of penetration depth

侵彻深度/m
300-1	600-1	900-1	300-2	600-2	900-2
0.56	1.18	2.01	0.52	1.10	2.00

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