复杂超限高层建筑结构的性能化设计探讨

Discussion on Performance Design of Complex Over-limit High-rise Building Structure

现行规范中引用多项计算指标用于描述高层结构的不规则程度,刚重比与周期比,相邻楼层刚度比等,分析其指标的实用性与存在的局限性,有时在计算其性能指标时会存在很多问题。20世纪90年代美国工程界提出PBSD方法,在复杂超限高层结构抗震设计中逐步得到应用。针对复杂超限高层建筑结构的特点,提出抗震性能目标的选用原则,结合超限高层建筑抗震设计,介绍基于性能抗震设计方法的应用。

In the current code, a number of calculation indicators are used to describe the degree of irregularity of the high-rise structure, the ratio of stiffness to cycle,the stiffness ratio of adjacent floors,etc.,and analyze the practicability and limitations of the indicators, and sometimes calculate their performance indicators. There will be many problems. In the 1990 s, the American engineering community proposed the PBSD method, which was gradually applied in the seismic design of complex over-limit high-rise structures.According to the characteristics of complex over-limit high-rise building structure, the selection principle of seismic performance target is proposed, combined with the seismic design of over-limit high-rise building, the application of performance-based seismic design method is introduced.