【摘要】 采用ABAQUS软件建立了某混凝土板式楼梯的精细化三维有限元模型,并对其进行了竖向载荷和水平载荷作用下的非线性分析.结果表明,通过简化计算设计的混凝土板式楼梯完全满足结构的承载力和变形要求;在竖向载荷和水平载荷共同作用下,休息平台处的梯柱形成了短柱,其受力明显大于楼层处的梯柱,钢筋极易进入屈服状态;设计中应加强楼梯结构的抗震计算和分析.更多还原

【Abstract】 The fine 3Dfinite element model of one reinforced concrete slab stair is built with the software of ABAQUS,and then nonlinear analysis of the slab stair under vertical and horizontal load is carried out.Analysis results show that the reinforced concrete slab stair designed with simplified calculation method completely meets the bearing capacity and deformation requirements of the structure;the stair columns of rest platform under vertical and horizontal load form short columns,the stress in them is evidently bigger than the stress in the stair columns of floor,so reinforcing steel bar will enter the yield condition easily;antiseismic calculation and analysis should be enforced in stair design.更多还原