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首页> 外文会议>Conference on Recent Developments in High Strain Rate Mechanics and Impact Behavior of Concrete >Predicting the Response of Concrete Barriers to Rigid Projectile Impacts Using AEM
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Predicting the Response of Concrete Barriers to Rigid Projectile Impacts Using AEM

机译：使用AEM预测混凝土屏障对刚性射弹影响的响应

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For protective construction applications involving high-velocity projectile impacts, design engineers rely on properly designed reinforced concrete barriers to provide the necessary resistance to penetration. Typically dynamic testing, analytical, semi-empirical and/or computational approaches are called upon to properly handle this highly complex physical problem. The presented research evaluates the use of Applied Element Method (AEM), implemented in Extreme Loading for Structures (ELS) software, to predict the localized damage and penetration of concrete slabs due to high-velocity normal impacts of rigid projectiles. Two validation cases were considered involving different concrete and reinforcing rebar material properties and projectile impact velocities. The applicability of AEM simulations was validated by comparing predicted damage and projectile penetrations to corresponding observations and measurements obtained during impact testing. A limited parametric study including seven analytical cases was performed to investigate the effects of varying concrete strengths, reinforcement arrangements and concrete thickness on the penetration resistance of concrete targets. To achieve this, three concrete classes; Normal Strength Concrete (NSC), Medium Strength Concrete (MSC) and High Strength Concrete (HSC), three reinforcement configurations (unreinforced, single-layer/ larger bar, double-layers) and larger thickness were considered. The application of the engineering-oriented AEM/ ELS software was found to provide impact response predictions that are in good agreement with physical test results. The results of the parametric study confirmed the advantages of using higher concrete strengths and higher reinforcement ratios in improving the penetration resistance and reducing the scabbing damage of reinforced concrete barriers.
机译：对于涉及高速弹丸影响的保护施工应用，设计工程师依赖于适当设计的钢筋混凝土屏障，为必要的抗渗透抵抗。通常，调用分析，分析，半经验和/或计算方法来正确处理这种高度复杂的物理问题。本研究评估了应用元素方法（AEM）的使用，以极端负载用于结构（els）软件，以预测由于刚性射弹的高速正常影响，混凝土板的局部损坏和渗透。考虑了两个验证案件涉及不同的混凝土和加强钢筋材料性能和射弹冲击速度。通过将预测的损伤和射弹渗透与影响测试期间获得的相应观测和测量相比，通过将预测的损伤和射弹渗透进行验证，验证了AEM模拟的适用性。在包括七种分析案件的有限参数研究，探讨了不同混凝土强度，加固装置和混凝土厚度对混凝土靶标的渗透性的影响。实现这一目标，三个具体课程;正常强度混凝土（NSC），中型强度混凝土（MSC）和高强度混凝土（HSC），考虑了三种增强件（未粘接，单层/较大的条，双层）和较大的厚度。找到了以工程为导向的AEM / ELS软件的应用提供了与物理测试结果良好一致的影响响应预测。参数研究的结果证实了使用更高的混凝土强度和更高的增强比来提高渗透性和降低钢筋混凝土屏障的粘接损伤的优点。

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