單向軟鋼隔震耗能支座的滯回性能研究
丁磊1,舒贛平2
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(1 浙江大學(xué)建筑設(shè)計研究院, 杭州 310028; 2 東南大學(xué)土木工程學(xué)院, 南京 210096)[摘要]基于ANSYS有限元軟件,對于采用H形截面的軟鋼隔震耗能支座的滯回性能進行了支座腹板的寬厚比、軸壓比和高寬比等多參數(shù)分析。其中尤以寬厚比對支座的耗能能力的影響最為顯著,支座的極限剪應(yīng)力和延性隨著寬厚比的減小而增大,故較小的寬厚比可以有效地延緩支座腹板的屈曲變形,有利于支座隔震耗能性能的充分發(fā)揮。研究結(jié)果表明軟鋼隔震耗能支座的耗能能力優(yōu)越,給出了工程中軟鋼隔震耗能支座的等效阻尼比的理論建議值,可供設(shè)計參考。[關(guān)鍵詞]軟鋼; 隔震支座; 滯回性能; 骨架曲線; 等效阻尼比中圖分類號:TU391 文獻標(biāo)識碼:A 文章編號:1002-848X(2013)15-0107-06Research of hysteretic behaviour of low yield point steel isolation bearing with H sectionDing Lei1, Shu Ganping2(1 Architectural Design and Research Institute of Zhejiang University, Hanzhou 310028, China; 2 School of Civil Engineering, Southeast University, Nanjing 210096, China)Abstract: The multi-parameter analysis of LYPB(low yield point steel isolation bearing) under the low cyclic load was conducted by using finite element program ANSYS, and the major factors that impact energy-dissipation performance of LYPB are the bearing web plate flakiness ratio, axial compression ratio and depth-width ratio. The web plate flakiness ratio is the most major factor. The smaller web plate flakiness ratio can effectively inhibit and delay the web plate’s buckling, exploit the energy dissipation advantages sufficiency of LYPB.The results show that LYPB has a good hysteretic energy dissipation performance, and the equivalent damping ratio of LYPB is proposed for design reference.Keywords: mild steel; H shape; isolation bearing; hysteretic behaviour; skeleton curve; equivalent damping ratio作者簡介:丁磊,碩士,工程師,Email:delacroix3649@163.com。參考文獻[1]丁磊. 軟鋼隔震耗能支座的研究、開發(fā)與應(yīng)用[D].南京:東南大學(xué),2008.[2]小池洋平,谷中聡久,宇佐美勉,等. 高機能補剛せん斷パネル型ダンパーの開発に関する実験的研究[C]//構(gòu)造工學(xué)論文集,2008,54A.[3]肖鵬. 低屈服點剪切耗能板滯回性能研究[D]. 上海:同濟大學(xué),2005.[4]陳驥. 鋼結(jié)構(gòu)穩(wěn)定理論與設(shè)計[M]. 3版. 北京:科學(xué)出版社,2006.[5]郭耀杰. 鋼結(jié)構(gòu)穩(wěn)定設(shè)計[M]. 武漢:武漢大學(xué)出版社,2003.