(中国建筑设计研究院北京 100044)

［提要］将《建筑抗震设计规范》(GB50011—2001)中的6,7,8,9度抗震设防烈度细分为26个小的抗震设防烈度等级，其中6度5个等级和7度10个等级按0.01g一级递增，8度10个等级按0.02g一级递增，并将之与各抗震设防地区50年以下的设计使用年限间建立了对应关系表，该表可以应用于设计使用年限小于50年的丙类建筑按设计使用年限进行的结构鉴定和结构设计。

［关键词］设计使用年限  抗震设防水准  小于50年

Design Suggestion on Seismic Fortification Criterion of C Types Building Structures for Design Working Life Below 50 Years/Chen Caibao (China Architecture Design ＆ Research Group, Beijing 100044, China)

Abstract:The four classes(degree 6,7,8,9) of seismic fortification intensity in code seismic design of buildings GB50011—2001 are separated 26 classes, and five for degree 6 of them,ten for degree 7 of them are increased by 0.01g, ten for degree 8 of them are increased by 0.02g. The relation between the clasees and design working life of structure below 50 years for places in the defferent seismic fortification intensitys is set up, which can be used for seismic appraiser and design of C type’s building structures below 50 years by design working life.

Keywords:design working; life seismic fortification criterion; below 50 years