Reinforced concrete (RC) slabs may be subjected to impulsive dynamic loads such as blast and impact during their service period. Many studies related to the impact behavior of RC slabs have been presented. However, comprehensive studies where the effect of the support conditions on the impact behavior of RC slabs has been investigated are still limited. Thus, this study has focused on the effects of the support types and the support layouts on the dynamic responses and the failure modes of RC slabs subjected to impact loads. In the first part of the study, 9 two‐way RC slabs with various support layouts composed of fixed and hinged supports were tested under impact load via the drop‐weight test setup. Two different input impact energies were transmitted to RC slabs during impact loading. The time histories of the accelerations and displacements occurred in RC slabs, and the impact loads acting on RC slabs were recorded. The crack patterns due to the impact load were observed. The dynamic responses obtained by experiments have been interpreted in detail. In the second part, a detailed finite element procedure in which explicit dynamic analysis is performed has been introduced for verification of the experimental results. Good agreement between the experimental and the numerical results has been demonstrated. It has been concluded that proposed finite element procedures can be used for evaluation of the dynamic responses and failure modes of RC slabs under low‐velocity impact load.

中文翻译：

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不同支撑条件下钢筋混凝土板冲击性能的试验与数值研究

钢筋混凝土（RC）平板在使用期间可能会承受冲击动载荷，例如爆炸和冲击。已经提出了许多有关钢筋混凝土板冲击行为的研究。但是，关于支撑条件对钢筋混凝土板冲击性能影响的综合研究仍然有限。因此，本研究集中于支撑类型和支撑布局对承受冲击载荷的RC板的动力响应和破坏模式的影响。在研究的第一部分中，通过落锤测试装置在冲击载荷下测试了9个双向RC平板，这些平板具有由固定支架和铰链支架组成的各种支架布局。在冲击载荷期间，两种不同的输入冲击能量被传递到RC平板。钢筋混凝土楼板发生了加速度和位移的时间历程，并记录了作用在钢筋混凝土楼板上的冲击载荷。观察到由于冲击载荷引起的裂纹模式。通过实验获得的动态响应已得到详细解释。在第二部分中，介绍了详细的有限元程序，其中进行了显式动态分析，以验证实验结果。实验结果与数值结果之间的一致性很好。得出的结论是，所提出的有限元程序可用于评估低速冲击荷载下钢筋混凝土板的动力响应和破坏模式。通过实验获得的动态响应已得到详细解释。在第二部分中，介绍了详细的有限元程序，其中进行了显式动态分析，以验证实验结果。实验结果与数值结果之间的一致性很好。得出的结论是，所提出的有限元程序可以用于评估低速冲击荷载下钢筋混凝土板的动力响应和破坏模式。通过实验获得的动态响应已得到详细解释。在第二部分中，介绍了详细的有限元程序，其中进行了显式动态分析，以验证实验结果。实验结果和数值结果之间的一致性很好。得出的结论是，所提出的有限元程序可以用于评估低速冲击荷载下钢筋混凝土板的动力响应和破坏模式。