【作者】 吴静；

【导师】 彭伟；

【作者基本信息】 西南交通大学 ， 结构工程， 2003， 硕士

【摘要】 高层建筑偏心支撑钢框架结构是近十几年发展起来的一种新型结构体系，在大震作用下它具有极好的耗能能力。本文着重对这种结构体系的一些抗震性能参数进行了研究。 本文首先论述了偏心支撑钢框架的计算原理，及其国内外发展概况。然后从该结构中的最关键构件---耗能梁段的简化屈服模型入手，研究其在外荷载作用下的变形机制及几何关系式，并由此提出了耗能梁段的较理想的屈服机制。接着在此基础上应用虚功原理，分别研究了耗能梁段长度对D型、K型和V型三种偏心支撑框架的极限承载力、刚度以及延性的影响。此外，总结了多种关于梁段长度取值的规定及公式。 同样，根据偏心支撑框架的几何变形机制，应用虚功原理，重点推导并分析比较了分别采用D型、K型或者V型支撑时对结构的极限承载力、弹性刚度以及延性的不同影响。此外也将它与纯框架和中心支撑框架进行了比较。 最后，针对不同耗能梁段长度以及不同偏心支撑形式这两方面，对理论推导选取了相应的算例，并运用有限元分析软件ANSYS对所选实例进行了计算分析。通过有限元软件的分析结果与理论推导的对照，从而得到了较一致的结论，可供工程设计人员参考。更多还原

【Abstract】 Eccentrically braced steel frame(EBSF) used in high-rise buildings is a new structural system which has developed in recent years. It performs excellent energy-consuming ability when bearing unwonted earthquake. This paper focuses on the research of anti-seismic parameters of EBSF.Firstly, this paper presents the theory of EBSF and relevant developing situation inside and outside China. Then, on the basis of the simplified yielding model of active beam link, which is the key component of EBSF, the deformation mechanism and geometry relation equation under different kinds of loads are analyzed, and then the ideal yielding mechanism of EBSF is proposed. According to these , applying the virtual work theory, this paper analyzed the influence of active beam link on the terminal carrying capacity, stiffness and ductibility of three types of EBSF. Several formula about the length of active beam link are also introdued.Similarly, according to the deformation mechanism of EBSF and the virtual work theory, the influence of three different active beam links on the terminal carrying capacity, stiffness and ductibility of EBSF is deducted. Moreover, the EBSF is compared with none braced frames and centrically braced frames on performance.Lastly, some relevant examples are presented in accordance with different lengths of active beam link and different types of EBSF. Then those examples are calculated by finite element analytical software and the results are consistent with theoretic conclusion. This paper is applicable to structural designs.更多还原