This study focuses on investigating the effect of one or more open stories in reinforced concrete hilly buildings. Two building configurations, i.e., (i) stepback and (ii) split-foundation, with three different story ratios, are considered. Open stories are provided at different levels in a building according to the prospective location of the approach road level. These buildings are subjected to bi-directional earthquake excitation, and non-linear dynamic analyses are performed under a suite of 22 ground motion records. Dynamic characteristics and seismic responses such as peak inter-story drift ratio, peak floor acceleration, peak roof displacement, and maximum story shear of the buildings are investigated. A probabilistic performance assessment of these buildings with different probable locations of the open story is presented. In general, the probabilistic assessment reveals that the presence of the open story significantly reduces the seismic performance of these buildings. Moreover, the buildings with the open story at the uppermost foundation level are found to be the most vulnerable under earthquake excitation.

本研究的重点是调查钢筋混凝土丘陵建筑中一个或多个开放楼层的影响。考虑了具有三种不同楼层比率的两种建筑配置，即（i）后退和（ii）分裂基础。根据引道层的预期位置，在建筑物的不同层提供开放式楼层。这些建筑物受到双向地震激励，并在一套 22 条地震动记录下进行非线性动力分析。研究了建筑物的峰值层间漂移比、峰值楼层加速度、峰值屋顶位移和最大层剪力等动力特性和地震响应。展示了这些建筑物的概率性能评估，这些建筑物具有不同的开放楼层可能位置。一般来说，概率评估表明，开放式楼层的存在显着降低了这些建筑物的抗震性能。此外，发现在最上层基础层具有开放式楼层的建筑物在地震激发下最脆弱。