核岛结构双钢板混凝土组合剪力墙抗侧刚度

Lateral Stiffness of Composite Shear Walls with Double Steel Plates and Filled Concrete for a Nuclear Island Structure

为研究核岛屏蔽厂房结构在地震作用下的抗侧力能力,对9个1∶5缩尺比的双钢板混凝土组合剪力墙试件进行了低周往复拟静力试验,分析研究了栓钉间距、钢板厚度和加劲肋的设置等因素对剪力墙试件初始抗侧刚度的影响.研究结果表明:栓钉间距对剪力墙试件初始刚度的影响不明显,剪力墙初始抗侧刚度随着钢板厚度的增大和加劲肋的设置而有所提高.对试件进行理论假设和简化处理,利用单位荷载法推导出双钢板混凝土组合剪力墙试件初始抗侧刚度的计算公式,通过比较发现计算值和试验值吻合较好.研究了剪力墙试件在往复加载过程中抗侧刚度的变化过程,发现不同阶段的抗侧刚度在变化幅度上有差别.

In order to study the ability to resist lateral force of nuclear shielding workshop under earthquake action,the low cyclic loading tests of nine 1/5 scaled composite shear walls with double steel plates and filled concrete were carried out. This paper studied the influence of several parameters such as stud space,thickness of the palate and stiffener on initial lateral stiffness of specimens. The results showed that the initial stiffness of composite shear walls increased with the thickness of steel plates and stiffening rib setting,but the factor of stud space had no obvious effect on it. The calculation formula of initial stiffness of composite shear walls with double steel plates and filled concrete was derived by using unit load method,theoretical hypothesis and simplified precondition. The calculation value was consistent with the experimental value. Moreover,the change process of lateral stiffness of shear wall specimens under cyclic loading was studied and it was found that the changing degree of the stiffness was different in the different stages of the change process of lateral stiffness.