某超高层办公楼结构抗震可恢复性能设计

Seismic resilience design of a super high-rise office building

以一栋超高层办公楼为例,介绍了工程结构的抗震性能目标及耗能装置耗能目标,将可恢复功能防震结构的概念从理论应用到实际工程中。在传统抗震结构布置的基础上,根据结构受力特点布置了BRB、软钢连梁、伸臂阻尼及阻尼墙等耗能装置,并进行了多遇地震作用下的弹性分析和罕遇地震、极罕遇地震作用下的弹塑性分析。多遇地震作用下的弹性分析结果表明,结构主要指标均满足规范要求;罕遇地震作用下的弹塑性分析结果表明,可更换构件及黏滞阻尼构件充分耗能,能够有效地控制结构的残余层间位移角及结构的损伤,结构整体具有良好的震后可恢复性能;极罕遇地震作用下的弹塑性分析结果表明,结构可达到“不倒”的性能目标。

Taking a super high-rise office building as an example, the seismic performance objectives and energy dissipation target of damping devices were introduced in this paper. The concept of earthquake resilient structure was applied to practical engineering. On the basis of traditional seismic structural design, viscous damping outrigger truss, viscous damping walls, mild steel coupling beam, and BRBs were used in the structure according to the mechanical characteristics of the structure. Elastic analysis for the case of frequent earthquake and inelastic analysis for the cases of rare earthquake and extremely rare earthquakes were carried out. The results of elastic analysis show that the structural performance satisfies the requirements of related specifications. The inelastic analysis results considering the rare earthquake show that the full energy dissipation of replaceable components and viscous damping components can effectively control the residual story drift angle and structural damage. The whole structure has good earthquake resilient performance. The goal of no collapsing can be achieved when the structure experiences extremely rare earthquake.