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（蘇州市吳中區(qū)建筑工程施工圖審查中心, 蘇州 215128）
［摘要］偏心支撐結(jié)構(gòu)彈性階段剛度大，塑性階段耗能能力強(qiáng)，是適用于高烈度震區(qū)的一種有效的抗側(cè)力結(jié)構(gòu)體系。首先介紹了偏心支撐耗能梁段內(nèi)力分布特點(diǎn)和偏心支撐耗能機(jī)構(gòu)，根據(jù)偏心支撐結(jié)構(gòu)在地震荷載作用下耗能梁段進(jìn)入塑性的破壞特點(diǎn)，提出了耗能梁段采用曲殼單元和其余構(gòu)件采用梁?jiǎn)卧姆蔷€性有限元模型來(lái)分析偏心支撐鋼框架在循環(huán)荷載作用下耗能的性能和破壞機(jī)理。通過(guò)有限元模擬計(jì)算分析，得到了偏心支撐鋼框架抗震對(duì)策。
［關(guān)鍵詞］偏心支撐； 耗能梁段； 殼單元； 梁?jiǎn)卧?/span>
中圖分類(lèi)號(hào)： TU352.11 文獻(xiàn)標(biāo)識(shí)碼： A 文章編號(hào)： 1002-848X(2015)S2-0475-03
Eccentrically braced steel frames energy-dissipation mechanisms and seismic design recommendation
Shen Xiaoming
(Wuzhong Construction Drawing Inspection Center of Suzhou, Suzhou 215128, China)
Abstract: Eccentrically braced steel frame is a lateral load-resisting system which applys high intensity area and can provide the high elastic stiffness that meets higher steel building drift requirement. An introduction of forces in links and energy dissipation mechanisms of eccentrically braced steel frames was provided. In that eccentrically braced steel frames will collapse after the link beams go into plastic deformation under earthquake load. A new analytical model which includes shell element apply to link beams with large deformation and plastic deformation and beams element apply to other parts of structure was presented for analyzing eccentrically braced steel frames energy-dissipation behavior and collapse mechanism. The seismic design recommendations of eccentrically brace were presented.
Keywords: eccentrically braced steel frame; energy-dissipation links； shell element； beam element
作者簡(jiǎn)介：沈曉明，碩士，一級(jí)注冊(cè)結(jié)構(gòu)工程師，Email:761730785@qq.com。
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