【作者】 李志刚；

【导师】 郝际平； 蔡益燕；

【作者基本信息】 西安建筑科技大学 ， 结构工程， 2004， 硕士

【摘要】 传统的高层钢结构体系有两种：抗弯框架和中心支撑框架。 抗弯框架具有良好的非弹性性能，并且柱间为无障碍空间，方便平面布置。但由于其柔性较大，楼层较多时满足侧移要求不够经济。 中心支撑框架具有很大的弹性刚度，在实际中应用广泛。但支撑的屈曲会使结构的承载力降低。 偏心支撑框架综合了抗弯框架和中心支撑框架的优点，能够提供很大的弹性刚度和非弹性能量耗散能力，以抵抗地震作用产生的侧向力。这种结构体系可以减少材料用量，并且在极限荷载情况下能够保持较好的延性。在强震区，偏心支撑框架是一种非常合适的结构形式，它具有良好的延性可以承受剧烈的循环荷载作用，在抗震结构中已得到了广泛的应用。 我国《建筑抗震设计规范》规定，8度以上宜采用偏心支撑，但我国至今没有一个自行设计的工程用过这种支撑。本文主要结合美国计算例题、相关规范，并依据我国规范，对偏心支撑框架的实际计算方法进行讨论，总结出适合我国规范和实际情况的偏心支撑框架设计计算方法。其中，重点介绍了各杆件的内力计算、消能梁段的设计、非消能梁段的设计、支撑的设计、柱的设计等，并附有算例，给工程设计提供理论基础和实用方法，有助于设计人员对该体系设计过程的了解和此种支撑的推广应用。更多还原

【Abstract】 There are two systems of conventional tall steel buildings: moment-resisting frames and concentrically braced frames.Moment-resisting frames have good inelastic behavior and are easy in interior planning thanks to being without obstacle between columns. Being with great flexibility, however, it is not economical to meet the inter story drift limit when the building is high.Concentrically braced frames can provide high elastic stiffness and are widely used. But the buckling of the brace can make the capacity drop.Eccentrically braced frames have the advantages of both moment-resisting frames and concentrically braced frames. This system can provide high elastic stiffness and large inelastic energy dissipation capacity in resisting lateral loads caused by seismic activity. They can reduce material consumption, and keep good ductility at extreme overloads. In high seismic regions, eccentrically braced frames are quite popular, they have good ductility and can sustain to severe cyclic loads, and they are used widely in seismic design. "Code for seismic design of building" stipulate, eccentrically braced frames are used in seismic regions No. 8 or above, but they have not yet used up to present time for buildings designed by domestic designers. In this paper, the practical calculations of eccentrically braced frames are discussed with reference to the US examples and codes on basis of the specifications of China. The calculations place emphasis on the internal force of elements, the design of links, the design of beams out side the links, the design of braces, the design of columns and so on, and the example is added. They provide the theoretical bases and practical way for project design, and are helpful to the comprehension of the design procedures for the designers and popularization of this system.更多还原