基于洞口偏心率钢管混凝土剪力墙力学性能的研究

Mechanics behavior of steel tube-reinforce concrete composite shear walls based on eccentric opening ratio

为研究不同洞口偏心率下钢管混凝土剪力墙结构的受力性能，在试验的基础上，利用大型有限元软件ABAQUS，对3个开洞口面积相同，洞口偏心率为0，0．3，0．6的钢管}昆凝土剪力墙进行了非线性有限元分析。分析结果表明：洞口处于受压区时，随着偏心率的增加，其刚度和承载力都会有所下降；洞口处于受拉区，且偏心率较大时，小墙肢形成轴心受拉构件，结构易发生脱锚破坏；正向加载时，钢管混凝土剪力墙的延性会随着偏心率的增加而增加，反向加载时，会随着偏心率的增加而减小，正向加载时延性优于反向加载；钢管的存在，会产生抗剪销栓力，占总承载力的10％～20％，在承载力计算中应予以考虑。

In order to study the influence of eccentric opening ratio on mechanical behavior of steel tube-reinforced concrete composite shear wails, three finite element models with the same opening area and different eccentric o- pening ratio were established on the basis of experiment. The results indicate that when the opening is in compres- sion zone, the stiffness and the bearing capacity will decline with the increase of the eccentricity ; When the opening is in tension zone, while the eccentricity is large, small-sized coupling wall column will form member under axial tension lead to the wall anchor failure. The ductility of steel tube-reinforced concrete composite shear wall will in- crease with the increase of eccentric opening ratio under positive loading and decrease under reverse loading, and the ductility under positive loading is better than under reverse loading. Dowel shear force will be produced by steel tube which accounting 10%-20% of the total capacity should be considered in the bearing capacity calculation.