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（1 土木工程安全與耐久教育部重點(diǎn)實(shí)驗(yàn)室, 清華大學(xué)土木工程系, 北京 100084；  2 北京市鋼與

混凝土組合結(jié)構(gòu)工程技術(shù)研究中心, 清華大學(xué), 北京 100084； 3 華南理工大學(xué)土木與交通學(xué)院, 

廣州 510640； 4 華南理工大學(xué)亞熱帶建筑科學(xué)國(guó)家重點(diǎn)實(shí)驗(yàn)室, 廣州 510640）

［摘要］盡管結(jié)構(gòu)的抗震設(shè)計(jì)是工程防災(zāi)減災(zāi)研究中的重點(diǎn)，各國(guó)規(guī)范規(guī)定的設(shè)計(jì)方法卻存在較大差異。首先從設(shè)防目標(biāo)和地震作用兩方面詳細(xì)比較并分析了歐洲、美國(guó)、日本和中國(guó)規(guī)范的異同，為后續(xù)鋼框架的設(shè)計(jì)地震力和延性、抗側(cè)剛度與強(qiáng)度的對(duì)比提供基礎(chǔ)。結(jié)果表明，中國(guó)和美國(guó)規(guī)范的不倒塌要求對(duì)應(yīng)的地震水準(zhǔn)相當(dāng)，均比歐洲和日本規(guī)范高，但歐洲規(guī)范的正常使用要求對(duì)應(yīng)的地震水準(zhǔn)比中國(guó)和日本規(guī)范高；基于土層平均剪切波速得到了各國(guó)規(guī)范中場(chǎng)地分類的等效關(guān)系，其中中國(guó)規(guī)范對(duì)中等場(chǎng)地土的分類最細(xì)致；各國(guó)規(guī)范等效于中國(guó)規(guī)范的中震作用的彈性反應(yīng)譜表現(xiàn)出較大差異，其中針對(duì)低活躍性和中活躍性地震區(qū)日本規(guī)范規(guī)定的反應(yīng)譜顯著高于其他規(guī)范，而在高活躍性地震區(qū)各國(guó)規(guī)范規(guī)定的彈性反應(yīng)譜大小總體上相當(dāng)。

［關(guān)鍵詞］鋼框架； 抗震設(shè)計(jì)；  設(shè)防目標(biāo)； 地震作用

中圖分類號(hào)：TU318文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：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

*國(guó)家自然科學(xué)基金項(xiàng)目（51478244），國(guó)家自然科學(xué)基金優(yōu)秀青年基金項(xiàng)目（51522806）。

作者簡(jiǎn)介：施剛，教授，博士生導(dǎo)師，Email: shigang@tsinghua.edu.cn。