接触爆炸荷载作用下溢流坝的抗爆性能

徐强; 曹阳; 陈健云

doi:10.11883/1001-1455(2017)04-0677-08

接触爆炸荷载作用下溢流坝的抗爆性能

doi: 10.11883/1001-1455(2017)04-0677-08

徐强^{1, 2},
曹阳^{1, 2},
陈健云^{1, 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.
大连理工大学建设工程学部水利工程学院工程抗震研究所，辽宁大连 116024

基金项目:

国家重点基础研究发展计划“973”项目 2013CB035905

国家重点研发计划项目 2017YFC0404900

国家自然科学基金重点项目 51138001

国家自然科学基金重点项目 51178081

辽宁省教育厅重点实验室项目 LZ2015022

中央高校基本科研业务费专项资金项目 DUT15LK34

中央高校基本科研业务费专项资金项目 DUT14QY10

详细信息

作者简介:
徐强(1982-)，男，博士，副教授

通讯作者:
陈健云，chenjydg@dlut.edu.cn

中图分类号: O383.1
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- 文章访问数: 4057
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- 被引次数: 0
出版历程
- 收稿日期: 2015-12-25
- 修回日期: 2016-04-11
- 刊出日期: 2017-07-25

Antiknock performance of an overflow dam subjected to contact explosion

Xu Qiang^{1, 2},
Cao Yang^{1, 2},
Chen Jianyun^{1, 2
, ,}

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

摘要

摘要: 以黄登重力坝的溢流坝为研究背景，考虑混凝土的高应变率效应，运用Lagrange-Euler耦合算法建立大坝-库水-空气-炸药全耦合数值模型，研究溢流坝在接触爆炸荷载作用下的抗爆性能。分析满库与空库时溢流坝在爆炸冲击波作用下的动力响应及损伤程度，并进一步研究满库时大坝在不同炸点的水下接触爆炸荷载作用下的动力响应及损伤分布。研究结果表明，满库时水下爆炸比空库时爆炸的动力响应及损伤程度大得多；溢流坝的抗爆薄弱部位主要集中在溢流道顶部及坝体上游折坡处。研究溢流坝的抗爆性能时应重点研究满库时水下爆炸对大坝的破坏特性。
- 溢流坝 /
- 接触爆炸 /
- 动力响应 /
- 损伤 /
- 抗爆性能
Abstract: In this paper, against the background of the Huangdeng gravity dam and in consideration of the influence of the concrete's high strain rate, we established a fully-coupled numerical model for the dam-water-air-explosive using the Lagrange-Euler coupling method, and studied the antiknock performance of the overflow dam subjected to contact explosion loading. The dynamic response and damage of the overflow dam under the condition of withholding a full reservoir of water were compared with that under the condition of withholding an empty reservoir. Further, the response of the overflow dam subjected to underwater explosion at different explosion points was also investigated. The results show that, subjected to the same underwater explosion, the dynamic response and damage degree of the overflow dam withholding a full reservoir were significantly higher than those of the dam withholding an empty reservoir, and the weak points of the overflow dam were mainly located at the dam's overflow spillway on the top and the upstream slope. Therefore, it is concluded that research on the antiknock performance of an overflow dam subjected to underwater contact explosion should focus on the damage characteristics of the dam withholding a full reservoir.
- overflow dam /
- contact explosion /
- dynamic response /
- damage /
- antiknock performance

HTML全文

图 1 RHT本构模型

Figure 1. RHT consititute model

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图 2 溢流坝全耦合模型

Figure 2. Coupled model of overflow dam

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图 3 爆炸时程对比分析

Figure 3. Contrastive analysis of time-histories subjected to explosion

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图 4 损伤过程对比分析

Figure 4. Contrastive analysis of the damage propagation process

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图 5 测点2时程对比分析

Figure 5. Contrastive analysis of time-histories of gauge point 2

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图 6 测点2加速度反应谱对比

Figure 6. Contrastive analysis of acceleration response spectrum of gauge point 2

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图 7 不同炸点爆炸时坝体的损伤情况对比

Figure 7. Contrastive analysis of damage propagation processes of overflow dam at different explosion points

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表 1 修正的RHT本构模型参数

Table 1. Modified parameters of RHT constitutive model

A	N	p_spall^*	Q₀	B_Q	B	M	ε_min^f	σ_PTF/MPa
1.92	0.76	0.1	0.69	0.004 8	0.7	0.8	0.001	5

下载: 导出CSV

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