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中南大学学报(自然科学版)

Journal of Central South University

第50卷    第1期    总第293期    2019年1月

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文章编号:1672-7207(2019)01-0146-12
冲击波和预制破片联合作用下H型钢柱抗爆设计
田力1, 2,张浩1

(1. 天津大学 建筑工程学院,天津,300072;
2. 天津大学 滨海土木工程结构与安全教育部重点实验室,天津,300072
)

摘 要: 为分析近距爆炸冲击波和预制破片联合载荷作用下H型钢柱的抗爆性能,基于非线性有限元软件ANSYS-LSDYNA,采用参数化研究方法,在圆柱型炸药外侧设置预制破片,对钢柱的截面尺寸、炸药的比例距离和钢柱的防护加固进行定量研究。研究结果表明:在相同用钢量下,为提高钢柱的抗爆能力,应尽量选择翼缘宽度小于等于腹板高度的截面类型;腹板厚度较厚时,钢柱不易发生屈曲失稳破坏;较小的高厚比和宽厚比有利于提升钢柱的抗爆性能;在比例距离相同时,炸药量对钢柱的抗爆性能影响较大,在钢柱抗爆设计时应将炸药量作为主要考虑因素;在炸药量相同时,随着距离因素R增加,钢柱的破坏程度逐渐降低,但最终破坏作用呈现趋同的效果;在距离因素R相同时,随着炸药量的增加,钢柱的破坏程度逐渐加重,且破坏效果具有加速破坏效应。外粘CFRP材料对H型钢柱防护效果良好,从经济性考虑,黏结1层CFRP板就能起到很好的防护效果。

 

关键字: 冲击波;预制破片;联合作用;钢柱;抗爆设计

Antiknock design of H-section steel column subjected to synergistic effects of blast and prefabricated fragments
TIAN Li1, 2, ZHANG Hao1

1. School of Civil Engineering, Tianjin University, Tianjin 300072, China;
2. Key Laboratory of Coast Civil Structure Safety, Ministry of Education, Tianjin University Tianjin 300072, China

Abstract:In order to analyze the antiknock performance of H-section steel column under the combined blasting of near explosion and prefabricated fragments, the section size, the proportional distance and the reinforcement of steel column were studied by using parametric research methods based on the ANSYS/LS-DYNA. The results show that with the same amount of steel, the flange width less than or equal to the height of the web section type should be chosen. Thicker web is not prone to buckling destabilization damage. Smaller ratios of height to thickness and width to thickness are beneficial to steel column. When the proportional distance is the same, the amount of explosives has a great influence on the antiknock performance of steel column. When the amount of explosives is the same, with the increase of the distance factor R, the destruction degree of the steel column gradually decreases, and the destructive effect shows a convergent effect. When the distance factor R is the same, as the amount of explosives increases, the damage degree of the steel column gradually aggravates, and the destructive has superposition enhancement effect. External sticky CFRP material has good protective effect.

 

Key words: shock wave; prefabricated fragments; synergistic effects; steel column; anti-blast design

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
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