An initial punching shear failure or column loss in a reinforced concrete flat-plate structure may lead to the dynamic load redistribution to the surrounding connections. The dynamic demand and capacity at these connections will determine if subsequent failures occur leading to collapse of the structure. Therefore, the effect of dynamic load needs investigation in order to evaluate the collapse potential of the structure. This paper analyzes previous experimental work as well as new computational models to determine the effect of the dynamic load in terms of the dynamic load amplification as well as the dynamic capacity. The dynamic load amplification in flat-plate structures may be much less than what is used in current design guidelines. In addition, while the dynamic strength is relatively unchanged from the static, the ductility may be greater for connections with low reinforcement ratios. The results show that including the dynamic capacity can increase the load of the flat-plate system considered in this study to resist collapse progression by only approximately 0.5 kN/m² (10 psf).

钢筋混凝土平板结构中的初始冲剪破坏或立柱损失可能会导致动态载荷重新分布到周围的连接处。这些连接处的动态需求和容量将确定是否发生后续故障，从而导致结构崩溃。因此，需要研究动载荷的影响，以评估结构的倒塌潜力。本文分析了以前的实验工作以及新的计算模型，以确定动态负载在动态负载放大率和动态容量方面的效果。平板结构中的动态载荷放大可能远小于当前设计指南中使用的放大率。此外，虽然动态强度与静态强度相对没有变化，对于低配筋率的连接，延展性可能会更大。结果表明，包括动力容量可以增加本研究中所考虑的平板系统的载荷，以使其仅抵抗大约0.5 kN / m的坍塌进程²（10每方呎）。