AP1000屏蔽厂房在接触爆炸荷载作用下的非线性动力分析

陈健云; 曹翔宇; 徐强; 李静

doi:10.11883/bzycj-2019-0151

AP1000屏蔽厂房在接触爆炸荷载作用下的非线性动力分析

doi: 10.11883/bzycj-2019-0151

陈健云^{1, 2,},
曹翔宇²,
徐强^{1, 2, ,},
李静²

1.
大连理工大学海岸与近海工程国家重点实验室，辽宁大连 116024
2.
大连理工大学工程抗震研究所，辽宁大连 116024

基金项目: 十三五国家重点研发专项（2017YFC0404906）；辽宁省教育厅重点实验室基础研究（LZ2015022）

详细信息

作者简介:
陈健云（1968－　），男，博士，教授，chenjydg@dlut.edu.cn

通讯作者:
徐　强（1982－　），男，博士，副教授，xuqiang528826@dlut.edu.cn

中图分类号: O389
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- 被引次数: 11
出版历程
- 收稿日期: 2019-04-23
- 修回日期: 2019-11-11
- 网络出版日期: 2020-03-25
- 刊出日期: 2020-04-01

Dynamic responses of AP1000 reinforced concrete shield building subjected to contact explosion

CHEN Jianyun^{1, 2
,},
CAO Xiangyu²,
XU Qiang^{1, 2
, ,},
LI Jing²

1.
State Key Laboratory of Coastal and Offshore Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China
2.
Institute of Earthquake Engineering, Dalian University of Technology, Dalian 116024, Liaoning, China

摘要

摘要: 屏蔽厂房是AP1000核岛厂房的第一层外部防线，确保屏蔽厂房在服役期间遭受爆炸冲击荷载作用下的安全性和完整性，十分重要。本文中，采用欧拉-拉格朗日算法(coupled Euler-Lagrange, CEL)，对炸药在屏蔽厂房20种不同起爆部位作用下的动态破坏特征进行了研究，以结构贯穿破坏的损伤质量作为损伤程度的判别依据，着重探讨在不同起爆位置作用下结构的压力和损伤演化特性。研究表明：在接触爆炸荷载作用下，厂房在起爆点附近发生局部破坏；在相同高度下，环向不同角度起爆所引起的损伤程度差异较小，不同高度起爆的损伤程度差异较大。通过压力和损伤的演化分析，确定了屏蔽厂房最不利抗爆部位，对厂房不同部位的配筋策略提出建议。结论可为制定屏蔽厂房在爆炸冲击荷载作用下的安全防护措施提供参考依据。
- AP1000屏蔽厂房 /
- CEL算法 /
- 接触爆炸 /
- 损伤特性 /
- 动力响应 /
- 配筋策略
Abstract: The reinforced concrete (RC) shield building is the first external defense layer of AP1000 structure. Therefore, the safety and integrity must be ensured during the plant life in any conditions such as the blast loading. In this study, the coupled Euler-Lagrange (CEL) method was used to numerically simulate the fluid and structure interaction (FSI) between air and AP1000 RC shield building. The dynamic response analysis of the 20 contact explosion positions of the shield building under explosive loads were carried out, and the damage mass was used to evaluate the damage. The evolution mechanism of pressure and damage mode were discussed. The numerical results clearly show that, under the contact explosive loads, the RC shield building has the local damage near the explosive point. The damage degree at the same height but with different circumferential angle are similar, while those in the same circumferential angle with different height are different. In addition, through analyzing the pressure and damage evolution, the strategy of the different parts of the plant reinforcement was proposed. These results might be helpful to understand the behaviors and characteristics of the AP1000 RC shield building under contact explosion and provide valuable references in design and engineering practice.
- AP1000 RC shield building /
- CEL method /
- contact explosion /
- damage characteristic /
- dynamic responses /
- reinforcement strategy

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图 1 RHT本构应力应变曲线

Figure 1. Stress-strain curve of RHT constitutive model

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图 2 钢筋混凝土板

Figure 2. Reinforced concrete slab

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图 3 三维数值模型

Figure 3. Three-dimensional numerical model

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图 4 炸药起爆冲击作用下钢筋混凝土板的试验和数值结果

Figure 4. Experimental and numerical results of reinforce concrete slab under explosion

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图 5 AP1000核岛厂房有限元模型

Figure 5. Finite element model of AP1000 nuclear power plant

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图 6 不同网格尺寸下测点5的超压峰值曲线

Figure 6. Peak overpressure curves at point 5under different element sizes

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图 7 轴向、环向的炸点布设

Figure 7. Layout of axial and circumferential explosion points

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图 8 测点布置

Figure 8. Arrangement of observation points

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图 9 工况1各测点的压力曲线

Figure 9. Pressure curves of observation points of working condition 1

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图 10 工况1的压力分布

Figure 10. Pressure distributions of working condition 1

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图 11 工况1的损伤分布

Figure 11. Damage distributions of working condition 1

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图 12 工况1的损伤质量曲线

Figure 12. Damage mass curve of working condition 1

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图 13 工况1各测点的位移、速度、加速度曲线

Figure 13. Displacement, velocity and acceleration curves of different points of working condition 1

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图 14 不同轴向高度、不同环向角度爆源位置的损伤质量曲线

Figure 14. Damage mass curves with different axial and circumferential explosion points

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图 15 不同环向角度爆源位置的损伤云图

Figure 15. Damage distributions with different circumferential explosion points

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图 16 不同轴向高度爆源位置的压力和损伤分布

Figure 16. Pressure and damage distributions with different axial explosion points

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图 17 不同轴向高度爆源位置的von Mises应力曲线

Figure 17. Von Mises stress curves with different axial explosion points

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图 18 不同轴向高度爆源位置的损伤质量曲线

Figure 18. Damage mass curves with different axial explosion points

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表 1 不同网格尺寸下核岛厂房的自振频率

Table 1. Frequency of nuclear island under different element sizes

网格尺寸/mm	频率/Hz
网格尺寸/mm	一阶	二阶	三阶
300	3.316 9	3.326 5	5.141 0
500	3.366 6	3.377 1	5.191 8
800	3.372 0	3.382 4	5.184 8

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表 2 爆炸位置和工况

Table 2. Locations of explosion and working conditions

爆炸位置	工况	爆炸位置	工况	爆炸位置	工况	爆炸位置	工况	爆炸位置	工况
Ⅰ-1	1	Ⅱ-1	5	Ⅲ-1	9	Ⅳ-1	13	Ⅴ-1	17
Ⅰ-2	2	Ⅱ-2	6	Ⅲ-2	10	Ⅳ-2	14	Ⅴ-2	18
Ⅰ-3	3	Ⅱ-3	7	Ⅲ-3	11	Ⅳ-3	15	Ⅴ-3	19
Ⅰ-4	4	Ⅱ-4	8	Ⅲ-4	12	Ⅳ-4	16	Ⅴ-4	20

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