两端连接偏心支撑钢板剪力墙的弹塑性分析

发布时间：2018-05-04 08:33

本文选题：偏心支撑 + 钢板剪力墙　；参考：《西安建筑科技大学》2013年硕士论文

【摘要】：偏心支撑钢框架结构体系在罕遇地震作用时，因耗能梁段的屈服而进入塑性，结构表现出良好的延性和较强的能量耗能能力。大量的国内外学者通过对各种类型的钢板剪力墙试验和理论分析研究表明：钢板剪力墙是一种优异的抗侧力构件，，具有较高的侧向刚度、良好的延性、较强的能量耗能能力和较高的极限承载力等诸多优点的。结合支撑及剪力墙两种体系的特点，提出两端连接偏心支撑钢板剪力墙，并利用有限元程序研究分析，主要内容如下：对一榀足尺的两端连接偏心支撑钢板剪力墙(SBT模型)和两端连接钢板剪力墙(ST模型)，通过有限元软件ANSYS进行循环加载的模拟。对比分析了二者的滞回曲线、骨架曲线、延性系数、刚度退化和能量耗散系数。得出有限元模拟的SBT模型在弹性阶段和弹塑性阶段的承载力要高于ST模型，表明SBT模型具有较好的塑性变形能力。本文共选取了72个不同参数的模型，应用有限元软件ANSYS，针对计算模型在不同高厚比、宽高比、柱子的弹性刚度和耗能梁段的长度下对两端连接偏心支撑剪力墙的钢板墙的弹性屈曲荷载和极限承载力的影响。通过分析得出以下结论：由于薄板和厚板的破坏时原理上的不同，导致高厚比变化对SBT模型的弹性屈曲和抗剪性能的影响显著；宽高比变化对SBT模型的弹性屈曲和抗剪性能的影响较大；柱子的弹性刚度变化对SBT模型的弹性屈曲影响很小，但是对SBT模型的抗剪性能的影响却较大；耗能梁段的长度变化对SBT模型的弹性屈曲和抗剪性能的影响不显著。本文在有限元理论分析的基础上，得出了两端连接偏心支撑钢板剪力墙不仅具有很高的承载能力，而且还有很好的延性，对抗震设计具有有一定的指导意义，奠定了理论基础。
[Abstract]:The eccentrically braced steel frame structure system is plastic due to the yield of the energy dissipation beam section under the rare earthquake. The structure shows good ductility and strong energy dissipation ability. A large number of domestic and foreign scholars through the various types of steel plate shear wall test and theoretical analysis show that steel plate shear wall is an excellent lateral force resistance member, with high lateral stiffness and good ductility. It has many advantages, such as strong energy dissipation ability and high ultimate bearing capacity. Combined with the characteristics of two kinds of systems of bracing and shear wall, the paper puts forward two ends connecting eccentrically braced steel plate shear wall, and makes use of finite element program to study and analyze, the main contents are as follows: In this paper, the cyclic loading simulation of a full-scale shear wall with eccentrically braced steel plate (SBT model) and St model with steel plate shear wall (St) is carried out by means of finite element software ANSYS. The hysteretic curve, skeleton curve, ductility coefficient, stiffness degradation and energy dissipation coefficient are compared and analyzed. It is concluded that the bearing capacity of the SBT model simulated by the finite element method is higher than that of the St model in the elastic stage and the elastoplastic stage, which indicates that the SBT model has better plastic deformation ability. In this paper, 72 models with different parameters are selected, and the finite element software ANSYS is used to calculate the ratio of height to thickness and width to height. The effects of the elastic stiffness of columns and the length of energy-dissipation beams on the elastic buckling load and ultimate bearing capacity of steel plate walls with eccentric braced shear walls at both ends. The conclusions are as follows: due to the difference in the principle of the failure of thin plate and thick plate, the effect of the ratio of high to thick on the elastic buckling and shear properties of SBT model is significant; The ratio of width to height has a great effect on the elastic buckling and shear resistance of SBT model, and the change of elastic stiffness of columns has little effect on the elastic buckling of SBT model, but has a great effect on the shear performance of SBT model. The effect of the length of the energy dissipation beam on the elastic buckling and shear properties of the SBT model is not significant. Based on the theoretical analysis of finite element method, it is concluded in this paper that the shear wall with eccentrically braced steel plate at both ends not only has high bearing capacity, but also has good ductility, which has certain guiding significance for seismic design and lays a theoretical foundation.
【学位授予单位】：西安建筑科技大学
【学位级别】：硕士
【学位授予年份】：2013
【分类号】：TU313;TU391

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