- 摘 要
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（1 同濟(jì)大學(xué)土木工程防災(zāi)國家重點(diǎn)實(shí)驗(yàn)室， 上海 200092； 2 同濟(jì)大學(xué)建筑工程系， 上海 200092；
3 馬里蘭大學(xué)土木與環(huán)境工程系， College Park MD20742）
［摘要］提出了一種適用于梁貫通式支撐鋼框架的自復(fù)位支撐模塊，為結(jié)構(gòu)提供抗側(cè)剛度、自復(fù)位剛度和耗能能力，使得結(jié)構(gòu)在震后無殘余變形，更換支撐后即可使用。該模塊由水平邊緣構(gòu)件（HBE）、豎向邊緣構(gòu)件（VBE）、預(yù)應(yīng)力鋼絞線、鉸接柱和柔性支撐組成，其自復(fù)位剛度由沿HBE布置，錨固在VBE翼緣外側(cè)的預(yù)應(yīng)力鋼絞線提供。該模塊可在工廠預(yù)制，現(xiàn)場用高強(qiáng)螺栓與框架梁連接，便于施工。用有限元軟件ABAQUS6.11對該模塊進(jìn)行了精細(xì)化建模分析，并詳細(xì)解釋了分析結(jié)果。建立7個有限元模型進(jìn)行參數(shù)分析，表明預(yù)應(yīng)力鋼絞線的數(shù)量、初始預(yù)拉力的大小和支撐的橫截面積對模塊的剛度及耗能能力有較大影響。
［關(guān)鍵詞］鋼框架； 梁貫通； 自復(fù)位； 支撐； 模塊
中圖分類號： TU391 文獻(xiàn)標(biāo)識碼： A文章編號： 1002-848X(2016)S1-0579-04
Finite element modeling of concentrically braced self-centering modular
panel of beam-through steel frame
Du Xinlong1,2, Wang Wei1,2, Zhang Yunfeng3
(1 State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University, Shanghai 200092, China；
2 Department of Structural Engineering, Tongji University, Shanghai 200092, China;
3 Department of Civil & Environmental Engineering, University of Maryland, College Park MD 20742, USA)
Abstract: A new seismic load-resisting system termed concentrically braced self-centering modular panel (CB-SCMP) is presented， which provides lateral stiffness, self-centering stiffness and energy dissipation for beam-through steel frame. Because of the self-centering ability of CB-SCMP, the structure can re-center after earthquakes and return to service instantly after replacement of the bracings. The CB-SCMP consists of horizontal boundary elements (HBE), vertical boundary elements (VBE), post-tensioned strands, leaning columns and tension-only steel bracings, whose self-centering stiffness is provided by the post-tensioned strands which are parallel to HBE and anchored to the outer flange of VBE. The CB-SCMP can be shop prefabricated and then transported to the construction site for rapid installation into the main frame through bolt connections to the frame girder. A refined finite element model was established in ABAQUS6.11 and the results were interpreted in detail. The effects of the numbers of post-tensioned strands, the initial pretention and the cross-sectional area of the bracings on the stiffness and energy dissipation capacity of the CB-SCMP were investigated through 7 finite element models.
Keywords: steel frame; beam-through; self-centering; bracing; modular panel
作者簡介： 王偉，教授，博士生導(dǎo)師，Email:weiwang@#edu.cn。
*十二五國家科技支撐計劃課題（2015BAL03B01），曙光計劃。
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