The responses of flat reinforced concrete (RC) floor slabs with openings subjected to horizontal in-plane cyclic loads in addition to vertical service loads were investigated using nonlinear finite element analysis (FEA). A finite element model (FEM) was designed to perform a parametric analysis. The effects of opening sizes (7%, 14%, 25%, and 30% of the total area of the slab), opening shapes (elliptical, circular, L-shaped, T-shaped, cross, and rectangular), and location on the hysteretic behavior of the floor slab were considered. The research indicated that openings in RC floor slabs reduce the energy absorption capacity and stiffness of the floor slab. The inclusion of 30% opening on the floor slab causes a 68.5%, 47.3%, and 45.6% drop in lateral load capacity, stiffness, and lateral displacement, respectively, compared to the floor slab with no openings. The flat RC floor slab with a circular opening shape has increased efficiency. The placement of the openings is more desirable by positioning the openings at the intersection of two-column strips.

中文翻译：

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平面内循环荷载作用下带洞口的钢筋混凝土平面楼板的响应

使用非线性有限元分析 (FEA) 研究了带有开口的平面钢筋混凝土 (RC) 楼板承受水平面内循环载荷和垂直服务载荷的响应。设计了一个有限元模型 (FEM) 来执行参数分析。开口尺寸（板总面积的 7%、14%、25% 和 30%）、开口形状（椭圆形、圆形、L 形、T 形、十字形和矩形）和位置的影响考虑了楼板的滞后行为。研究表明，钢筋混凝土楼板的开孔会降低楼板的吸能能力和刚度。在楼板上包含 30% 的开口导致横向承载能力、刚度和横向位移分别下降 68.5%、47.3% 和 45.6%，与没有开口的楼板相比。圆形开口形状的扁平钢筋混凝土楼板提高了效率。通过将开口定位在两列条带的交叉处，更希望开口的放置。