Improving Seismic Resistance of Flat-Plate Buildings

平板结构是中低层住宅或办公建筑中应用最广泛的一种结构形式。最近的地震，如1988年的亚美尼亚地震和1985年的墨西哥地震，已经证明了这种建筑对严重破坏的敏感性。在独立的抗侧荷载系统不存在或失效的情况下，这些建筑物在地震发生时的生存完全取决于板-柱连接的性能。在连接区域使用高强混凝土和纤维增强混凝土或增加抗剪帽可能会提高板柱连接的抗剪强度，而无需采用其他相对昂贵的替代方案。将在模拟地震型荷载下测试八个半比例的双湾平板组件，以研究这些替代方案在提高平板建筑抗震性能方面的前景。这项研究应该为提高平板建筑的安全性提供基础，包括使用高强度和纤维增强混凝土，并为进一步改进板柱连接处不平衡弯矩传递机制的分析模型提供基础。

Flat-plate is one of the most widely used forms of construction among the low-to-medium-rise residential or office buildings. Recent earthquakes such as the Armenian (1988) and Mexican (1985) earthquakes have proven the susceptibility of such buildings to severe damage. In situations where an independent lateral load resisting system is not present or is rendered ineffective, the survival of such buildings in the event of an earthquake depends entirely on the performance of slab-to- column connections. The use of high strength concrete and fiber reinforced concrete in the connection region or the addition of shear caps can possibly improve the shear strength of slab-column connections without resorting to other relatively more expensive alternatives. Eight one-half scale two-bay flat- plate subassemblies will be tested under simulated earthquake- type loading to investigate the promise of such alternatives in improving the seismic resistance of flat-plate buildings. This study should provide the basis for improved safety of flat-plate buildings to include the use of high strength and fiber reinforced concrete and for further improvements in analytical modelling of the unbalanced moment transfer mechanism at the slab-column connections.