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考慮荷載長期作用時型鋼-混凝土組合梁的變形

Deflection of comDosite steel-concrete beams under long-term load combination

  • 摘要: 用考慮收縮、徐變和交接面滑移后的組合梁長期撓度計算方法對實際工程中的兩根典型組合梁進行了長期撓度計算,并將巖土工程分析軟件FLAC3D應用于組合梁的滑移面模擬,對計算數據、現場實測數據及計算機模擬分析結果進行了分析比較.實測及計算結果均表明,用現行規范中的計算方法將使組合梁的長期撓度計算值偏小,本文的研究方法可以用來計算組合梁的長期撓度.根據分析結果,提出了對組合梁在設計及施工時的一些建議.

     

    Abstract: Long-term deflection computations of two typical built-up beams in a actual project were carried out by a built-up beam long-term deflection computational method considering contraction, creep and composition plane slipping. The crag earth project analysis software FLAC3D was used to the built-up beam slip-surface simulation, and the calculated, measured and computer simulated data were compared subsequently. The results show that the proposed method is fit for calculating the long-term deflection. Some advices are also proposed for the design and construction of composite beams.

     

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