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    陳  猛
    （中交第四航務(wù)工程局有限公司，廣州510231）

[摘要] 對(duì)比分析高鋼規(guī)程層間位移修正與抗震規(guī)范節(jié)點(diǎn)域設(shè)計(jì)，指出對(duì)于基于我國抗震規(guī)范設(shè)計(jì)的鋼框架結(jié)構(gòu)，實(shí)質(zhì)上考慮節(jié)點(diǎn)域的模型彈性層間位移略小于軸心線模型，即考慮節(jié)點(diǎn)域的模型彈性剛度略高于軸心線模型，并通過鋼框架靜力彈塑性分析予以驗(yàn)證。根據(jù)抗震規(guī)范中節(jié)點(diǎn)域設(shè)計(jì)的力學(xué)模型背景，確定Krawinkler節(jié)點(diǎn)域模型，試驗(yàn)對(duì)比分析表明其較為合理?；谖覈?guī)范設(shè)計(jì)的鋼框架靜力彈塑性分析表明，節(jié)點(diǎn)域的塑性變形對(duì)層間位移的分布即抗震延性需求分布起到調(diào)節(jié)作用，使得各層結(jié)構(gòu)延性需求趨于均勻，降低延性需求的過度集中，延緩薄弱層的形成。地震作用下節(jié)點(diǎn)域延性系數(shù)較大，易引發(fā)節(jié)點(diǎn)域延性需求與塑性耗能的平衡性問題，應(yīng)予以重視。
[關(guān)鍵詞] 鋼框架；節(jié)點(diǎn)域；抗震性能；延性需求
中圖分類號(hào)：TU391.5    文獻(xiàn)標(biāo)識(shí)碼：A  文章編號(hào)：1002-848X(2011) S2-0256-06

    Research on actual impact of panel zone on seismic performance of steel frame
    Chen Meng
    ( CCCC Fourth Harbor Engineering Co., Ltd., Guangzhou 510231, China)

Abstract: Comparing drift correction of technical specification for steel structure of tall buildings with panel zone seismic design of Code for seismic design of buildings, it is indicated that for the designed steel frame based on China seismic code, in essence, drift of steel frame model considering panel zone is slightly less than taht of centerline model, that is, elastic stiffness of steel frame model considering panel zone is slightly lugher than that of centerline model, which is proved by pushover analysis. According to the mecharucal model of panel zone used in code for seismic design, Krawinkler model is determined, which is proved reasonable by comparing analysis with test. Based on pushover analysis of steel frame seismic designed by China code, it is determined that plastic deformation of panel zone adjust distribution of drift which is distribution of ductility demand, making story ductility demand more uniform and reducing ductility demand concentration, the formation of weak story is delayed. Panel zone ductility factor is so large that lead to balance problem between ductility demand and plastic energy dissipation, which should be paid attention to.
Keywords: steel frame; panel zone; seisnuc performance; ductility demand