建筑结构投稿登录
  
您现在的位置:建筑结构>> 期 刊>> 2017年>> 第02期>>正文内容
各国规范钢框架结构抗震设计方法对比研究(Ⅰ):设防目标与地震作用*
施刚1,2,胡方鑫3,4,石永久1,2
摘 要

(1 土木工程安全与耐久教育部重点实验室, 清华大学土木工程系, 北京 100084;  2 北京市钢与

混凝土组合结构工程技术研究中心, 清华大学, 北京 100084; 3 华南理工大学土木与交通学院, 

广州 510640; 4 华南理工大学亚热带建筑科学国家重点实验室, 广州 510640)

 

[摘要]尽管结构的抗震设计是工程防灾减灾研究中的重点,各国规范规定的设计方法却存在较大差异。首先从设防目标和地震作用两方面详细比较并分析了欧洲、美国、日本和中国规范的异同,为后续钢框架的设计地震力和延性、抗侧刚度与强度的对比提供基础。结果表明,中国和美国规范的不倒塌要求对应的地震水准相当,均比欧洲和日本规范高,但欧洲规范的正常使用要求对应的地震水准比中国和日本规范高;基于土层平均剪切波速得到了各国规范中场地分类的等效关系,其中中国规范对中等场地土的分类最细致;各国规范等效于中国规范的中震作用的弹性反应谱表现出较大差异,其中针对低活跃性和中活跃性地震区日本规范规定的反应谱显著高于其他规范,而在高活跃性地震区各国规范规定的弹性反应谱大小总体上相当。

[关键词]钢框架; 抗震设计;  设防目标; 地震作用

中图分类号:TU318文献标识码:A文章编号:1002-848X(2017)02-0001-06

 

Comparative study on seismic design methods for steel frames in different codes (Ⅰ): fortification target and seismic action

Shi Gang1,2, Hu Fangxin3,4, Shi Yongjiu1,2

(1 Key Laboratory of Civil Engineering Safety and Durability of China Education Ministry, Department of Civil Engineering, Tsinghua University, Beijing 100084, China; 2 Beijing Engineering Research Center of Steel and Concrete Composite Structures, Tsinghua University, Beijing 100084, China; 3 School of Civil Engineering and  Transportation, South China University of Technology, Guangzhou 510640, China; 4 State Key Laboratory of Subtropical Building Science, South China University of Technology, Guangzhou 510640, China)

Abstract:Although seismic design is the focus in research on prevention and reduction of damage to engineering structures by natural disasters, there is a large difference in design method in different seismic codes. A comparative study on fortification target and seismic action stipulated in Eurocode, the United States, Japanese and Chinese codes was presented to provide references for subsequent comparison in seismic design force and ductility, lateral stiffness and strength of steel moment frames. The results show that the no-collapse requirement in both the United States and Chinese codes corresponds to a similar hazard level, which is, however, higher than those in both Eurocode and Japanese codes; on the contrary, the serviceability requirement in Eurocode corresponds to a higher hazard level than that in Japanese and Chinese codes. Based on the average shear wave velocity, equivalent hard, medium and soft soils are obtained for different codes, and it is Chinese code that specifies the finest classification for medium soils. Equivalent elastic response spectra corresponding to design earthquake in different codes differ much from each other; in particular, the one in Japanese code with respect to low and moderate-seismicity regions is significantly larger than those in other codes, but in high-seismicity regions, the elastic response spectra in different codes are more comparable.

Keywords:steel frame; seismic design;  fortification target; seismic action

 

*国家自然科学基金项目(51478244),国家自然科学基金优秀青年基金项目(51522806)。

 

作者简介:施刚,教授,博士生导师,Email: shigang@tsinghua.edu.cn。

下载地址