水平加强层在框架—核心筒结构体系中的应用研究

Research on Frame-corewall Structure with Stiffness-strengthed Story

框架—核心筒结构是一种常用的高层建筑结构型式,设置水平加强层,可以增强结构的抗侧刚度,它是减小在风荷载作用下水平位移过大的有效方法,但在地震作用下,加强层的设置会引起结构刚度、内力突变,形成薄弱层,结构的破坏机理难以呈现"强柱弱梁"和"强剪弱弯"的延性屈服机制。论文结合实际工程,对是否设刚性加强层进行比较,对不同的模型进行计算,寻求设置加强层对结构周期、位移和受力性能的变化规律,从而为工程选择正确的结构体系,使设计安全、经济、合理。

The frame-core tube structure is one of the most commonly used structures in high-rise buildings. The strengthened stories can effectively reduce structure horizontal shift. But under the seismic impact, the strengthened stories will cause sudden variations of structure stiffness and internal force, and become weak stories. The structure damage mechanism will not show the yield mechanism of ＂strong columns, weak beams＂ and ＂strong resistance of shear force, weak resistance of bending moment＂, this paper discusses whether the stiffness-strengthened story should be used , displacement based on different kinds of computational models, and seeks the rule of strengthened story＇s impact on structure internal force, cycle, and displacement, so that the appropriate structure system can be selected to achieve safe, economic, and reasonable structure designs.