核电站双钢板混凝土剪力墙抗剪强度研究

以核电站屏蔽厂房剪力墙为原型,对含栓钉和加劲肋的双钢板混凝土组合剪力墙进行低周往复加载抗剪试验研究.试件包含3个1︰4缩尺模型,变化参数为栓钉间距与加劲肋,分析了试件的破坏特征、承载力以及耗能情况.试验研究发现:组合墙体整体受力性能良好,具有较强的抗剪性能.通过设置加劲肋,能有效提高墙体承载能力、刚度和延性.在试验基础上进行了有限元数值模拟与参数研究,研究了混凝土强度、钢板厚度、轴压力和加劲肋设置对抗剪强度的影响程度,并初步建立了核电站双钢板剪力墙抗剪强度计算公式,为核电安全壳设计理论的建立打下了基础.

Study on the Shear Strength of Double Steel Plate Composite Shear Wall in Nuclear Plant

This study investigated the behavior of double steel plate composite shear walls (SC), which are typical prototypes for nuclear shear walls. The testing program involved three 1/4 scaled SC wall specimens with different stud spacings and stiffening ribs. Cyclic loading tests were applied to those specimens to observe the failure patterns, bearing capacity and ductility performance .The result proves that the wall has strong shear strength and integrity. Setting the stiffening rib can effectively improve the bearing capacity, stiffness and ductility of the walls. Based on the experimental research, the specimens with different thicknesses of steel plate, concrete strength, axial compression and different contents of stiffener were simulated by using FEA to study the influence of these parameters on the shear strength. Finally, a formula of the shear bearing capacity of the SC wall was proposed, and this can be a guideline for nuclear containment design.