摘要
以基于性态的抗震设计为出发点 ,并以我国为例 ,针对目前国内外抗震设防标准的若干问题和不足 ,提出了基于性态抗震设计的三环节抗震设防方法 .将现有的设防内容改为确定结构的抗震设计类别、确定设计烈度或设计地震动参数、确定建筑的重要性等级 3个方面 ,并分别在每一方面进行具体深入的研究 ,从而形成了一套完整的基于性态的抗震设防标准确定的原则、方法和框架 。
The seismic design criterion adopted in the existing seismic design codes is reviewed. It is pointed out that the safe-economy based seismic design criterion is no longer adequate to the requirements of nowadays social and economic development. A new performance-based seismic design criterion composed of three components is presented in this paper, which can not only efficiently control the economic losses and casualty, but also ensure the building's function in proper operation during earthquakes. The three components are: classification of seismic design for buildings, determination of seismic design intensity and/or design ground motion for controlling seismic economic losses and casualties, and determination of the importance factors in terms of buildings service period. For controlling the seismic economic losses and life losses, the idea of social acceptable casualty level is presented and the 'Optimal Economy Decision Model' and 'Optimal Safe Decision Model' are established. Finally, a new method is recommended for calculating the importance factors of structures by adjusting structures service period on the base of more important structure with longer service period.
出处
《地震学报》
CSCD
北大核心
2002年第2期200-209,223,共10页
Acta Seismologica Sinica
基金
国家自然科学基金 (5 9895 410 )
地震科学联合基金 (95 0 7 44 4)
国家重点基础研究发展规划<大陆强震机理与预测项目>(95 130 6 0 3)共同资助项目
关键词
抗震性态
抗震设计
抗震设防标准
设防列度
地震危险性特征
地震易损性
地震经济损失估计
地震死亡率
performance-based design
seismic design criterion
seismic design intensity(ground motion)
seismic hazard characteristic
seismic vulnerability analysis
earthquake loss estimation
acceptable level for earthquake human mortality
