中文摘要：

钢筋混凝土核心筒是一种空间性能较好的抗侧力构件,其在地震作用下受力机理复杂,故准确模拟其非线性受力过程是结构抗震分析的重要课题。本文利用先进的数值模拟技术,在已有试验研究的基础上,对混凝土核心筒进行合理建模,并系统分析了轴压比、配筋率、加载角、高宽比和连梁刚度等对混凝土核心筒承载力和变形性能的影响规律。分析结果表明,数值模拟结果和试验结果吻合较好;轴压比、配筋率对核心筒的弹性和弹塑性性能影响显著;加载角和连梁刚度主要影响混凝土筒体开裂后的性能;而高宽比既影响核心筒的承载力和变形性能,又决定着核心筒的破坏形式。研究结果对混凝土核心筒的地震弹塑性计算具有一定的参考价值。

英文摘要：

As a kind of lateral resistant structure, reinforced concrete （RC） core tube takes on good spatial working capability and complicated mechanical behaviors under the earthquake function. Therefore, how to accurately simulate the nonlinear behaviors of RC tubes is an important problem in seismic analysis of structures. Based on the existing experiment data and the advanced numerical simulation technique, finite element model of RC tubes are established reasonably. Then the influence of axial compression ratio, reinforcement ratio, load action direction, ratio of height to width and stiffness of coupling beams on the capacity and deformation performance of RC tubes are analyzed systemically. The results from the simulation match well with those from the tests. The axial compression ratio and reinforcement ratio have distinct affect on the elastic and inelastic behavior of RC tubes; the load action direction and stiffness of coupling beams mainly have affect on the post-cracking behavior of RC tubes ; the ratio of height to width not only has affect on the capacity and deformation performance, but determine the failure forms of RC tubes. The conclusions in this paper are helpful in the elasto-plastic calculation of RC tubes or high-rise building.