- 摘 要
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李雪琛1， 吳曉蘭2， 左中杰1， 張華棟1， 王 立3
（1 中電投工程研究檢測評定中心振動所，北京 100840； 2 中國建筑技術(shù)集團有限公司，北京100013；3 中國電子工程設(shè)計院，北京 100840）[摘要] 采用ABAQUS軟件建立了多室式鋼管混凝土T形長柱的有限元模型，對4組試件進行了模擬分析，得出荷載-位移曲線。在此基礎(chǔ)上對多室式鋼管混凝土T形長柱的偏壓性能進行分析，得出N/Nu -M/Mu相關(guān)曲線，分析了各參數(shù)對N/Nu-M/Mu相關(guān)曲線的影響。采用已有鋼管混凝土承載力計算公式，對有限元分析結(jié)果進行數(shù)值回歸，引入 δ、η等系數(shù)，提出該類長柱偏壓承載力簡化計算方法。分析結(jié)果表明，所提出的簡化計算公式與數(shù)值模擬結(jié)果符合良好，可供工程設(shè)計參考。
[關(guān)鍵詞] 鋼管混凝土；多室式；T形截面；偏壓；有限元
中圖分類號：TU398 文獻標識碼：A 文章編號：1002-848X(2012) Sl-0754-05Performance analysis on multi-cell T-shaped concrete filled steel tubular long cloumn under eccentric compression
Li Xuechen1, Wu Xiaolan2, Zuo Zhongjie1, Zhang Huadong1, Wang Li3
(1 C +E Center for Engineering Research Test and Appraisal, Beijing 100840, China; 2 China Building Technique Group Co., Ltd., Beijing 100013, China; 3 China Electronics Engineering Design Institute, Beijing 100840, China)Abstract: The finite element modes of multi-cell T-shaped concrete filled steel tubular long column were established by using ABAQUS software. Four groups of specimens were analyzed, and the calculated force-displacement curve was drawn. On the basis of investigation above, analyses on multi-cell T-shaped concrete filled steel tubular long column under eccentric compression were proceed, and N/Nu-M/Mu curves were obtained. The effects of various factors on the N/Nu-M/Mu curves were analyzed. A simplified formula for calculating the ultimate strength of the new type of composite members under eccentrically loading is recommended in the end, using the formula form which had been applied. Analysis results show that the calculation results from the proposed formulas agree well with the finite element analysis results. The formulas are valuable to the engineering design.
Keywords: concrete filled steel tubular columns, multi-cell; T-shaped section; eccentric compression; finite element method
