摘要
为了得到钢筋混凝土目标在动能弹高速冲击作用下的破坏数据,基于大口径发射平台进行了100 mm口径卵形弹体高速侵彻钢筋混凝土靶体的实验,弹体质量为5.4 kg,靶体尺寸分为2 m×2 m×1.25 m和2 m×2 m×1.50 m两种,混凝土抗压强度为50 MPa,弹体侵彻速度为1 345~1 384 m/s,实验获得了弹体的侵彻深度及钢筋混凝土靶体的破坏数据。通过“钢筋混凝土全体单元分离式共节点建模方法”建立钢筋混凝土靶体模型,结合Riedel-Hiermaier-Thoma本构模型对实验工况进行计算。数值模拟给出了侵彻过程中钢筋的拉压力变化和分布规律,很好地模拟出贴近迎弹面钢筋在弹体高速冲击作用下伴随混凝土反向飞溅而产生的反向拉伸现象及靶体背面钢筋在混凝土崩落作用下发生的拉伸现象;数值模拟得到的弹体侵深数据、现象与实验结果吻合良好,实验验证了“钢筋混凝土全体单元分离式共节点建模方法”的可靠性。
In order to obtain the damage data of reinforced concrete targets subjected to high-velocity impact of kinetic-energy projectiles,based on the large-caliber launch platform,penetration experiments were carried out by applying 100-mm-caliber oval projectiles with high velocity penetrating into reinforced concrete targets.The projectile mass is 5.4 kg,and the target dimensions have two kinds:2 m×2 m×1.25 m and 2 m×2 m×1.50 m.The compressive strength of the concrete is 50 MPa,and the penetration velocity of the projectile ranges from 1 345 to 1 384 m/s.The penetration depths of the projectiles and the damage data of the reinforced concrete targets were obtained by the experiment.The reinforced concrete target model was established through the reinforced concrete all solid hexahedral separation common node modeling.The numerical simulation was then carried out by this modeling method combined with the Riedel-Hiermaier-Thoma constitutive model.Numerical simulation results display the variation and distribution of the tensile and compressive stresses in the steel bars in the penetration process.The reverse stretching phenomenon of the rebar mesh near the front surface and the tensile phenomenon of the rebar mesh near the rear surface are perfectly simulated by this method.The simulated penetration depth and the damage phenomenon of the reinforced concrete are in good agreement with the experimental results.It proves the reliability of the reinforced concrete all solid hexahedral separation common node modeling.
作者
马天宝
武珺
宁建国
MA Tianbao;WU Jun;NING Jianguo(State Key Laboratory of Explosion Science and Technology,Beijing Institute of Technology,Beijing 100081,China;Beijing Institute of Space Science and Technology Information,Beijing 100094,China)
出处
《爆炸与冲击》
EI
CAS
CSCD
北大核心
2019年第10期81-91,共11页
Explosion and Shock Waves
基金
国家自然科学基金（11390363,11472036）
关键词
侵彻
钢筋混凝土
结构破坏
共节点建模
penetration
reinforced concrete
structural damage
common node modeling
