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芯筒-刚臂结构广泛应用于超高层建筑设计中,但由于其刚臂设置引起的刚度突变容易造成刚臂及附近所在楼层在地震作用下发生破坏。目前,被动耗能减震技术日趋成熟,其中屈曲约束支撑(简称BRB)在高层建筑中应用最为广泛。将BRB设置于刚臂和外柱连接处,作为屈曲约束柱(简称BRC),提出新的芯筒-刚臂结构减震体系(BRC between the outrigger and exterior columns of COS,简称BRCC-COS减震结构体系),并基于抗震性能设计方法完成BRC的设计。针对芯筒-刚臂结构的平面简化模型,利用弹塑性时程分析方法研究其在地震作用下的结构特性。最后,根据不同的地震损伤模型评估研究该减震结构体系的地震损伤程度,研究分析表明,该减震结构体系能够降低由于刚臂设置引起的附近楼层和核心筒在地震下的损伤程度,并为该类结构的耗能减震设计提供可靠的理论依据。
The core-arm structure is widely used in the design of super high-rise buildings. However, due to the stiffness change caused by the rigid arm setting, it is easy to cause the damage of the arm and the floor near it under the earthquake. At present, the technology of passive energy dissipation and damping has matured. Among them, the buckling restraint brace (BRB) is the most widely used in high-rise buildings. The BRB is set at the connection between the rigid arm and the outer column as a buckling restraint column (BRC), and a new BRC-the-outer column of COS (BRCC-COS) damping system is proposed Structural system), and based on the seismic design method to complete the BRC design. Aiming at the plane simplified model of the core-arm structure, the structural characteristics of the core-arm structure subjected to the earthquake are studied by elasto-plastic time-history analysis. Finally, according to different earthquake damage models, the degree of earthquake damage of the shock-absorbing structural system is evaluated. The analysis shows that the shock-absorbing structural system can reduce the damage degree of the nearby floors and core cylinders caused by earthquakes caused by the arm setting It provides a reliable theoretical basis for the energy-absorbing design of this kind of structure.