工程爆破

2016, v.22(05) 64-68

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爆炸荷载作用下钢筋砼板结构的破坏特性
Structural damage characteristics of reinforced concrete slab under the explosion loading of contact and close-in

赵小华;王高辉;卢文波;李麒;陈明;严鹏;
ZHAO Xiao-hua;WANG Gao-hui;LU Wen-bo;LI Qi;CHEN Ming;YAN Peng;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering Ministry of Education,Wuhan University;

摘要(Abstract):

钢筋混凝土板结构是军事工程和核电工程中常用的构建物,但爆炸能够对其造成严重的破坏。首先分别建立方形混凝土板、钢筋、空气和TNT三维实体模型,采用Lagrange-euler耦合算法仿真计算近场爆炸作用下方形钢筋混凝土板的抗爆性能,并通过与实验结果的对比验证了耦合模型的可靠性。在此基础上,使用该仿真模型对接触爆炸作用下方形钢筋混凝土板的毁伤特性进行了研究。结果表明:接触爆炸作用下钢筋混凝土板的破坏区域主要集中在板中心处,迎爆面压碎成坑、板中心冲切成孔和下表面的震塌剥落是其主要破坏模式。
Reinforcement concrete was the principle material for military engineering and nuclear power plant,but the blasting pressure could destroy such structures.A three-dimensional model was created to simulate close-in explosion,and arbitrary Lagrange-Euler coupling interaction was taken into.The concrete,steel bar,air and TNT were modeled with separated modeling method.The reliability of the coupled model was verified by the comparison between the numerical results and the experimental results.Then the damage mechanism and mode of reinforced concrete slab subjected to contact explosion were studied.From this study,it was observed that the main failure mode of the reinforcement concrete slab under contact explosion was punching and spalling.

关键词(KeyWords): 数值仿真;钢筋混凝土板;破坏特性;接触爆炸;近场爆炸;爆炸荷载
Numerical simulation;Reinforcement concrete slab;Damage mechanism;Contact explosion;Close-in explosion;Explosion loading

Abstract:

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基金项目(Foundation): 长江科学院开放研究基金资助项目(CKWV2016383/KY);; 国家自然科学基金项目(51125037.51509189);; 中国博士后科学基金资助项目(2015M572197);; 国家重点研发计划项目(2016YFC0402008)

作者(Author): 赵小华;王高辉;卢文波;李麒;陈明;严鹏;
ZHAO Xiao-hua;WANG Gao-hui;LU Wen-bo;LI Qi;CHEN Ming;YAN Peng;State Key Laboratory of Water Resources and Hydropower Engineering Science,Wuhan University;Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering Ministry of Education,Wuhan University;

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