超限高层抗震性能目标的确定实例

我国规范采用三水准设防、两阶段设计的方法进行抗震设计。基于性能的抗震设计理论提出了多水准、多目标设防的概念,是当前国际抗震设计发展的方向。实现性能设计,首先要提出切实可行的抗震性能目标。首先列举了国外规范及我国规程提出的结构抗震性能要求,继而归纳总结了国内学者针对超限高层提出的性能目标。在此基础上,给出了4栋典型超高层设计过程中采用的抗震性能目标。在进行超限高层结构设计时,除确定结构整体的性能目标外,应针对结构的薄弱部位制定相应的性能目标并采取相应措施,以保证结构设计的安全合理。

Determination and examples of the performance objectives to super high-rise buildings

In Code for seismic design of buildings of China,three seismic fortification levels and two-stage design methods are applied.Performance-based seismic design(PBSD) is the development trend of seismic design in the world,which puts forward to multi-target and multi-level fortification.To manage PBSD,we should establish realistic performance objectives.The performance objectives described in American codes and Chinese codes were introduced,then the research achievements of Chinese scholars were summarized.Aft...