- 摘 要
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丁婷1， 黃鎮(zhèn)1， 李愛群1， 劉康安2
（1 東南大學(xué)土木工程學(xué)院，南京 210096；2 南京丹普科技工程有限公司，南京 211000）[摘要] 為保證防屈曲支撐工作性能的穩(wěn)定性，提出一種新型外圍約束機(jī)制。通過有限元分析，同時考慮初始缺陷的影響和接觸非線性，對防屈曲支撐進(jìn)行數(shù)值模擬，分析其在兩種不同形式的加勁布置方式下支撐的力學(xué)性能。分析表明，不同的屈曲約束形式對核心構(gòu)件側(cè)向變形的約束效果不同，從而影響軸向位移的加載幅值和支撐的承載力。基于上述分析，給出防屈曲支撐的外圍約束單元的設(shè)計(jì)建議。
[關(guān)鍵詞] 防屈曲支撐；接觸；側(cè)向位移；滯回曲線
中圖分類號：TU323.2 文獻(xiàn)標(biāo)識碼：A 文章編號：1002-848X(2011) Sl-0174-04Firute element analysis of innovative stiffeners buckling-restrained braces
Ding Ting1, Huang Zhen1, Li Aiqun1, Liu Kang' an2
(1 College of Civil Engineering, Southeast University, Nanjing 210096, China; 2 Nanjing DAMP Science and Technology Engineering Co., Ltd.,Nanjing 211000, China)Abstract: In order to ensure the holistic stability of buckling-restrained braces, it puts forward a kind of innovative periphery restriction mechanism, which enhances its lateral stiffness by setting stiffening on the wall of restriction. Considering the effect of initial limitation and contact nonlinear analysis, with finite element procedure, the buckling-restrained braces were simulated and the mechanical performance of braces under two different collocational quomodo of stiffening was analyzed. By the analysis, different restriction has different restriction degree to lateral displacement of kemel. It can affect the axile displacement and carrying capacity of braces. At last, some design advices to this
innovative stiffening of buckling-restrained braces were proposed.
Keywords: buckling-restrained braces; contact; lateral displacement; hysteretic curve
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