近爆作用下中空夹层超高性能钢管混凝土柱的抗爆性能

邓旭辉; 王达锋

doi:10.11858/gywlxb.20200540

近爆作用下中空夹层超高性能钢管混凝土柱的抗爆性能

doi: 10.11858/gywlxb.20200540

邓旭辉,
王达锋^*, ,

湘潭大学土木工程与力学学院，湖南湘潭　411105

基金项目: 湖南创新型省份建设专项（2019RS1059）

详细信息

作者简介:
邓旭辉（1975－），男，博士，副教授，主要从事工程结构设计与分析研究. E-mail： dengbh@xtu.edu.cn

通讯作者:
王达锋（1995－），男，硕士研究生，主要从事工程结构设计与分析研究. E-mail： 369909072@qq.com

中图分类号: O389
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出版历程
- 收稿日期: 2020-04-09
- 修回日期: 2020-05-26
- 刊出日期: 2020-06-25

Anti-Blast Performance of Ultra-High Performance Concrete-Filled Double Steel Tubes under Close-in Blast Loading

DENG Xuhui,
WANG Dafeng^{*
, ,}

College of Civil Engineering and Mechanics, Xiangtan University, Xiangtan 411105, Hunan, China

摘要

摘要: 为研究中空夹层超高性能钢管混凝土（Ultra-high performance concrete-filled double skin steel tubes, UHPCFDST）柱在近爆载荷作用下的抗爆性能，建立了TNT炸药-UHPCFDST柱-空气三维有限元模型，采用ALE多物质流固耦合算法分析了UHPCFDST柱在近爆作用下的损伤机理、能量吸收特性和影响参数，计算结果表明：UHPCFDST柱在近爆作用下的典型破坏模式为钢管的塑性变形和混凝土芯柱的凹陷破坏，且混凝土芯柱的损伤过程可以分为3个阶段；与填充普通混凝土柱相比，UHPCFDST柱具有优异的抗爆性能；在一定范围内，减小截面空心率可以有效提升UHPCFDST柱的抗爆性能；增加内外钢管厚度均可提升UHPCFDST柱的抗爆性能，但增加外层钢管厚度时提升效果更显著；有无轴压对UHPCFDST柱的变形有较大影响，在一定范围内增加轴压比有利于抵抗整体变形，但同时局部变形增大，当轴压比较大时，UHPCFDST柱在近爆载荷和轴向载荷作用下失去承载能力。
- 中空夹层超高性能钢管混凝土柱 /
- 近爆 /
- 损伤机理 /
- 能量吸收特性
Abstract: In order to study the explosion resistance of ultra-high performance concrete-filled double skin steel tubes (UHPCFDST) under near-explosive loads, a three-dimensional finite element model of TNT explosives-UHPCFDST columns-air was established. The ALE multi-material fluid-solid coupling algorithm is used to analyze the damage mechanism, energy absorption characteristics and influence parameters of UHPCFDST columns under near-explosion. The calculation results show that the typical failure modes of UHPCFDST columns under near-explosion are plastic deformation and the collapse of the concrete core pillar. The damage process of the concrete core pillar can be divided into three stages. Compared with the ordinary concrete column, the UHPCFDST column has superior anti-blast performance; within a certain range, reducing the cross-section hollow ratio can effectively improve the explosion resistance of UHPCFDST columns; increasing the thickness of inner and outer steel pipes, particularly for the inner pipe, can increase the explosion resistance of UHPCFDST columns. The presence of axial pressure has a great influence on the deformation of the UHPCFDST column. The increase of axial pressure ratio, within a certain range is beneficial to resisting the overall deformation. As the axial pressure continues to increase, local deformation increases and the UHPCFDST column would lose its strength under the combined effects of the near-blast and the axial loads.
- ultra-high performance concrete-filled double skin steel tubes /
- close-in blast loading /
- damage mechanism /
- energy absorption characteristics

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图 1 普通强度混凝土和UHPC的 $\lambda$ 和 $\eta$

Figure 1. $\lambda$ and $\eta$ values in normal strength concrete and UHPC

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图 2 整体计算模型

Figure 2. Overall calculation model

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图 3 UHPCFDST柱横截面几何尺寸和网格划分

Figure 3. Geometry and meshing of UHPCFDST columns

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图 4 网格划分细节

Figure 4. Mesh details

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图 5 不同炸药当量下实验与数值模拟凹陷变形对比

Figure 5. Comparison of the sag deformation between experiments and numericalsimulations under different explosive equivalents

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图 6 UHPCFDST柱钢管不同时刻的应力云图

Figure 6. Stress diagram of the UHPCFDST column steel pipe at different time

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图 7 UHPCFDST柱不同时刻的损伤轮廓

Figure 7. Damage profile of the UHPCFDST column at different time

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图 8 UHPCFDST柱的塑性变形能时程曲线

Figure 8. Plastic deformation energy-time history curves of the UHPCFDST column

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图 9 UHPCFDST柱的动能时程曲线

Figure 9. Kinetic energy-time history curves of the UHPCFDST column

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图 10 不同混凝土强度CFDST柱的局部变形时程曲线

Figure 10. Local deformation-time history curves of the CFDST column with different concrete strength

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图 11 不同混凝土强度CFDST柱的整体变形时程曲线

Figure 11. Overall deformation-time history curves of the CFDST column with different concrete strength

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图 12 混凝土强度对CFDST柱变形的影响

Figure 12. Effect of concrete strength on deformation of the CFDST columns

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图 13 不同截面空心率UHPCFDST柱局部变形时程曲线

Figure 13. Local deformation-time history curves of the UHPCFDST column with different hollow ratios

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图 14 不同截面空心率UHPCFDST柱整体变形时程曲线

Figure 14. Overall deformation-time history curves of the UHPCFDST column with different hollow ratios

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图 15 截面空心率对UHPCFDST柱变形的影响

Figure 15. Influence of cross-section hollow ratios on the UHPCFDST column deformation

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图 16 外钢管厚度变化时UHPCFDST柱的局部变形时程曲线

Figure 16. Local deformation-time history curves of the UHPCFDST column with various outer steel thicknesses

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图 17 外钢管厚度变化时UHPCFDST柱的整体变形时程曲线

Figure 17. Overall deformation-time history curves of the UHPCFDST column with various outer steel thicknesses

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图 18 内外钢管厚度变化对UHPCFDST柱变形的影响

Figure 18. Influence of the thickness of inner and outer steel pipes on the UHPCFDST column deformation

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图 19 不同轴压比UHPCFDST柱的局部变形时程曲线

Figure 19. Local deformation-time history curves of the UHPCFDST column under various axial compression ratios

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图 20 不同轴压比UHPCFDST柱的整体变形时程曲线

Figure 20. Overall deformation-time history curves of the UHPCFDST column under variousaxial compression ratios

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表 1 TNT炸药的主要参数^[8]

Table 1. Main parameters of TNT explosives^[8]

A/GPa B/GPa R₁ R₂ $\omega$ $\;\rho$ _e/(kg·m⁻³) D/(m·s⁻¹) p/GPa E/(MJ·kg⁻¹)

373.8 3.75 4.5 0.9 0.35 1 640 5730 19 6.93

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表 2 空气的主要参数

Table 2. Main parameters of air

C₀ C₁ C₂ C₃ C₄ C₅ C₆ $\;\rho$ _a/(kg·m⁻³) E₀/(J·m⁻³) V₀

0 0 0 0 0.4 0.4 0 1.29 2.5 × 10⁵ 1.0

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表 3 钢材的主要参数^[10–12]

Table 3. Main parameters of steel^[10–12]

Material $\;\rho$ _s/(kg·m⁻³) E_s/GPa $\nu$ Y/MPa $\tau$ /GPa C/s⁻¹ P

Steel 7 850 206 0.3 348.5 2.1 6 844 3.91

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表 4 UHPC关键参数

Table 4. Key parameters of UHPC

Material $\;\rho$ ₀/(kg·m^-3) F_c/MPa F_t/MPa $\nu$ B₁ W_LZ/mm $\omega$

UHPC 2 400 170 18 0.19 0.80 6 0.10

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表 5 网格划分细节和结果

Table 5. Meshing details and results

Mesh No. Meshing details Denting depth/mm
Along the radial Along the circumference Along the height

1 1 + 8 + 1 40 100 66.5
2 2 + 15 + 2 80 200 72.6
3 3 + 15 + 3 120 300 73.2

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表 6 CFDST凹陷位移试验值^[10]与数值模拟值对比

Table 6. Comparison of the CFDST depression displacement between experiments^[10] and numerical simulations

Explosive mass/kg CFDST depression displacement/mm Error/%
Experiment Simulation

5 29.3 28.6 2.4
8 77.7 72.6 6.6

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表 7 不同工况数值模型参数

Table 7. Model parameters in different working conditions

Group No. D_i/mm t_i/mm D_o/mm t_o/mm

Outer steel pipe thickness change 1 159 6 325 4
2 159 6 325 5
3 159 6 325 6
4 159 6 325 7
Inner steel pipe thickness change 5 159 4 325 6
6 159 5 325 6
7 159 6 325 6
8 159 7 325 6

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参考文献(19)

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A/GPa	B/GPa	R₁	R₂	$\omega$	$\;\rho$ _e/(kg·m⁻³)	D/(m·s⁻¹)	p/GPa	E/(MJ·kg⁻¹)
373.8	3.75	4.5	0.9	0.35	1 640	5730	19	6.93

C₀	C₁	C₂	C₃	C₄	C₅	C₆	$\;\rho$ _a/(kg·m⁻³)	E₀/(J·m⁻³)	V₀
0	0	0	0	0.4	0.4	0	1.29	2.5 × 10⁵	1.0

Material	$\;\rho$ _s/(kg·m⁻³)	E_s/GPa	$\nu$	Y/MPa	$\tau$ /GPa	C/s⁻¹	P
Steel	7 850	206	0.3	348.5	2.1	6 844	3.91

Material	$\;\rho$ ₀/(kg·m^-3)	F_c/MPa	F_t/MPa	$\nu$	B₁	W_LZ/mm	$\omega$
UHPC	2 400	170	18	0.19	0.80	6	0.10

Mesh No.	Meshing details			Denting depth/mm
Mesh No.	Along the radial	Along the circumference	Along the height	Denting depth/mm
1	1 + 8 + 1	40	100	66.5
2	2 + 15 + 2	80	200	72.6
3	3 + 15 + 3	120	300	73.2

Explosive mass/kg	CFDST depression displacement/mm		Error/%
Explosive mass/kg	Experiment	Simulation	Error/%
5	29.3	28.6	2.4
8	77.7	72.6	6.6

Group	No.	D_i/mm	t_i/mm	D_o/mm	t_o/mm
Outer steel pipe thickness change	1	159	6	325	4
	2	159	6	325	5
	3	159	6	325	6
	4	159	6	325	7
Inner steel pipe thickness change	5	159	4	325	6
	6	159	5	325	6
	7	159	6	325	6
	8	159	7	325	6

近爆作用下中空夹层超高性能钢管混凝土柱的抗爆性能

doi: 10.11858/gywlxb.20200540

作者简介: 邓旭辉（1975－），男，博士，副教授，主要从事工程结构设计与分析研究. E-mail： dengbh@xtu.edu.cn

通讯作者: 王达锋（1995－），男，硕士研究生，主要从事工程结构设计与分析研究. E-mail： 369909072@qq.com

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出版历程

Anti-Blast Performance of Ultra-High Performance Concrete-Filled Double Steel Tubes under Close-in Blast Loading

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出版历程

目录

作者简介:
邓旭辉（1975－），男，博士，副教授，主要从事工程结构设计与分析研究. E-mail： dengbh@xtu.edu.cn

通讯作者:
王达锋（1995－），男，硕士研究生，主要从事工程结构设计与分析研究. E-mail： 369909072@qq.com