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Numerical simulation of concrete shrinkage mode of simple composite beams acted by long-term deformation
Author(s): 
Pages: 56-61
Year: Issue:  1
Journal: Hydro-Science and Engineering

Keyword:  simply supported composite beamslong-term deformationconcrete shrinkage mode;
Abstract: 长期荷载作用下,钢-混凝土组合梁会因混凝土的收缩而产生附加变形,我国现行规范均未详细考虑这一附加变形对组合梁长期变形的影响.分析研究了国内外文献中有关混凝土收缩的计算理论,基于澳洲规范(AS3600-1988)建立了考虑混凝土收缩应变的组合梁附加挠度计算式,对实际工程中的2根典型组合梁进行了实际收缩效应的计算,利用有限差分模拟分析软件FLAC3D对组合梁在收缩效应下的变形进行了模拟计算,并对各项计算结果进行了分析比较.计算结果、FLAC3D数值模拟结果及实测数据的对比分析表明,该计算式的计算值与模拟值和实测值最为接近,可用于组合梁长期附加挠度的计算分析.
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