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运用ABAQUS软件分别对普通和带混合暗支撑的钢筋混凝土核心筒进行动力弹塑性分析和静力弹塑性分析,并对两者的弹塑性性能进行比较。分析表明:与普通钢筋混凝土核心筒相比,带混合暗支撑钢筋混凝土核心筒的承载力和变形能力显著提高,刚度分布更为均匀,表现出更好的整体性。基于此,进一步研究了连梁跨高比、角柱含钢率以及墙肢斜撑布置形式等因素对带混合暗支撑钢筋混凝土核心筒弹塑性性能的影响,结果表明:随着连梁高度的增大,带混合暗支撑钢筋混凝土核心筒的承载力显著增大,而变形能力则逐渐降低;随着角柱含钢率的增加,带混合暗支撑钢筋混凝土核心筒的承载力同样逐渐增大;与每层仅有一组墙肢斜撑的布置形式相比,每层两组墙肢斜撑的布置形式承载力更高、布置形式更优。
The ABAQUS software was used to analyze the dynamic elasto-plasticity and the static elasto-plastic analysis of ordinary and mixed dark-supported RC core tubes, respectively. The elasto-plastic properties of the two were compared. The analysis shows that compared with ordinary reinforced concrete core tube, the bearing capacity and deformation capacity of reinforced concrete core with mixed dark support are significantly improved, and the stiffness distribution is more uniform and shows better integrity. Based on this, the influences of the span ratio of the spar, the steel ratio of the spandrel and the bracing arrangement of the wall limbs on the elasto-plasticity of the core tube with mixed dark support were further studied. The results show that with the increase of the spandrel height, The bearing capacity of large and mixed dark-supported reinforced concrete core tube increased significantly, while the deformation capacity decreased gradually. With the increase of steel content, the bearing capacity of reinforced concrete core with mixed dark support increased similarly. Compared with the arrangement of only one set of bracing members on each floor, the arrangement form of two groups of bracing members on each wall is higher and the arrangement form is better.