【作者】 郭丰雨；

【导师】 张令心；

【作者基本信息】 中国地震局工程力学研究所 ， 防灾减灾工程及防护工程， 2004， 硕士

【摘要】 目前，钢—混凝土核心筒混合结构在我国高层及超过层建筑中应用地越来越广泛，但对其抗震性能的研究还很不完善，远远不能适应其发展建设速度的需要。因此，本文着重研究这种结构的主要抗侧力部分—钢筋混凝土核心筒的非线性地震反应分析方法，旨在为进一步深入研究整个结构的抗震性能及抗震设计方法奠定基础。 为了给出一个合理有效的非线性地震反应分析方法，本文需要着重解决两个关键问题，即核心筒合理的非线性分析模型的确定和可反映核心筒真实性态的非线性滞变模型的选取。为此，本文首先分析总结了钢筋混凝土核心简的受力性能，发现它与剪力墙的受力性能十分相近。因而，综合其受力特性和现有剪力墙非线性分析模型，确定了一个合理的钢筋混凝土核心筒的非线性反应分析模型—多竖线单元模型。然后，对多竖线核心筒模型中的水平剪切弹簧和竖向单元轴向弹簧的滞变模型进行了选取。通过对现有国内外钢筋混凝土核心简体及部分剪力墙试验结果的分析，给出了核心筒的剪切滞变模型特征，并结合现有剪切滞变模型，选取了核心筒的剪切滞变模型—带捏缩的修正Takeda模型；通过分析现有钢筋混凝土轴向刚度滞变模型，选取了核心筒的轴向刚度滞变模型—江近仁等基于试验给出的轴向刚度滞变模型。并对这两个滞变模型进行了局部改进，使其更加完善。最后，应用所确定的分析模型给出钢筋混凝土核心筒非线性地震反应分析方法，在大型平面建筑结构非线性动力反应分析专用程序DRAIN—2D的基础上编制了相应的分析计算程序，并作为其中的一个新的单元。通过三个算例，验证了该分析程序的可靠性和有效性。本文方法不但可以用于钢—混凝土核心筒混合结构中，还可以进一步推广应用到钢筋混凝土框架—剪力墙及钢筋混凝土简体、筒中筒等结构中。更多还原

【Abstract】 At present, the steel-concrete hybrid structures have been applied to the tall buildings and super-tall buildings more and more widely in our country. The poor study on seismic behavior of the structures does not meet the needs of its development speed. So this paper gives mainly a nonlinear seismic response analysis method of reinforced concrete core-tube, which is key lateral-force-resisting member of the steel-concrete hybrid structures. The method lays a foundation to research further the seismic behavior and seismic design method of the hybrid structures.To give a reasonable and effective method of nonlinear seismic response analysis, two key problems should be solved. The one is to determine the reasonable nonlinear analysis model of concrete core-tube, and the other one is to select the nonlinear hysteretic model that can reflect true behavior of the core-tube. At first, the mechanics behavior of the concrete core-tube is analyzed. It is found that its mechanics behavior is similar to the shear-wall’s. Therefore, by considering its mechanics behavior and analyzing current nonlinear analysis models of shear-wall, the multiple vertical line element model is determined as the nonlinear response analysis model of reinforced concrete core-tube. Secondly, the hysteretic models of horizontal and vertical springs in the multiple-vertical core-tube model are chosen. By analyzing the results of current concrete core-tube and some shear-wall tests at home and abroad, the features of shear hysteretic model of the core-tube are given. Compared with the current shear hysteretic models, the revised Takeda model with pinch is selected as the shear hysteretic model of the concrete core-tube. By analyzing current axial-stiffness hysteretic models of concrete structures, the axial-stiffness hysteretic model, which is given based on test results by Jiang Jinren, is selected as the axial-stiffness hysteretic model of concrete core-tube. And the two hysteretic models selected are improved so that they become more perfect. At last, the nonlinear seismic response analysis method of the core-tube is given by using the analysis model, and the corresponding analysis program is compiled on the basis of the large special computer program DRAIN-2D and added to DRAIN-2D. The program is proved to be reliable and-II-_____________________effective by three examples. The method in this paper can be used in steel-concrete core-tube structures and reinforced concrete frame-shear wall structures, and can be extended to use in reinforced concrete core structures and tube in tube structures.更多还原