中国与伊朗抗震规范地震作用对比研究  

Comparative study on seismic action between Chinese code and Iranian code

作　　者：张辉 Zhang Hui(Fujian Yongfu Power Engineering Co.,Ltd.,Fuzhou Fujian 350108,China)

机构地区：[1]福建永福电力设计股份有限公司,福建福州350108

出　　处：《山西建筑》2024年第1期50-54,共5页Shanxi Architecture

摘　　要：介绍了伊朗抗震规范的抗震设防目标与方法、场地类型、地震风险分区、设计反应谱以及基底剪力的计算,并与《建筑抗震设计规范》相关内容进行了对比。结果表明,伊朗规范根据结构重要性对建筑有选择性地做“两水准”抗震设防;基于平均剪切波速伊朗规范中的Ⅰ类场地近似于中国规范的Ⅰ0场地,其余各类场地之间无直接对应关系;伊朗规范设计反应谱动力系数随场地类型与地震风险分区变化,在低地震风险区的软弱场地上动力系数峰值高达3.25;伊朗规范地震作用基于“中震”计算,经结构性能系数折减后的基底剪力:高延性混凝土框架的基底剪力比中国规范小,低延性混凝土框架的基底剪力比中国规范大得多,中延性混凝土框架的基底剪力与中国规范的大小比较结果在不同场地不同周期段表现不同。Seismic fortification target and basic design method,site class,seismic hazard zone,design response spectrum and calculation of base shear force in Iranian seismic code were introduced.The differences between Chinese code and Iranian code in the above aspects were analysed and compared.The results shows that the Iranian code selectively requires“Two Levels”of seismic fortification for buildings according to structural importance;site class I in Iranian code is approximately equal to site class I 0 in Chinese code based on average shear wave velocity,and there is no direct correspondence between other site classes;the dynamic amplification coefficient of design response spectrum in Iranian code varies with site classes and seismic hazard zones,and the peak dynamic coefficient in the weak site and in the low seismic hazard zone is as high as 3.25;the seismic action in Iranian code is based on the moderate earthquake,then it is reduced by the structure behavior coefficient to calculate base shear force:that of concrete frame with high ductility is smaller than that in Chinese code,and that of concrete frame with low ductility is much larger than that in Chinese code,and comparison result of base shear force of concrete frame with the moderate ductility between the two codes varies with different sites and different periods.

关 键 词：设计反应谱 地震作用 地震影响系数 场地类型 结构性能系数 

分 类 号：TU318[建筑科学—结构工程]