| 钢管混凝土轴压构件徐变有限元研究 |
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| 引用本文： | 冯伟,查晓雄.钢管混凝土轴压构件徐变有限元研究[J].建筑钢结构进展,2011,13(1):49-56. |
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| 作者姓名： | 冯伟 查晓雄 |
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| 作者单位： | 哈尔滨工业大学,深圳研究生院,广东,深圳,518055 |
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| 摘 要： | 在高层和超高层建筑中采用钢管混凝土结构,可充分利用空钢管所具有的强度和刚度,并能较好地解决混凝土硬化时间较长与施工速度之间的矛盾。但由此也会带来这样的问题,即在结构施工过程中,构件所受长期荷载随施工过程逐渐增加,徐变持续发展,混凝土卸载,内力重新分布,导致构件稳定承载力降低。本文运用DirichLet级数建立管内混凝土徐变模型,并应用非线性有限元软件ABAQUS对钢管混凝土徐变以及承载力进行了有限元计算,较好地模拟了钢管混凝土的徐变过程。本文回归分析了钢管混凝土的徐变性质,并认为可以用初应力的方法粗略估计徐变构件对承载力的影响。
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| 关 键 词： | 钢管混凝土 徐变 有限元 承载力 |
Finite Element Analysis on the Creep Behavior of Axially-Compressed Concrete Filled Steel Tube Members |
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| FENG Wei,ZHA Xiao-xiong.Finite Element Analysis on the Creep Behavior of Axially-Compressed Concrete Filled Steel Tube Members[J].Progress in Steel Building Structures,2011,13(1):49-56. |
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| Authors: | FENG Wei ZHA Xiao-xiong |
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| Affiliation: | FENG Wei,ZHA Xiao-xiong(Shenzhen Graduate School,Harbin Institute of Technology,Shenzhen 518055,China) |
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| Abstract: | The use of concrete filled steel tubular (CFST) structures in high-rise building can well solve the conflict between the long time of concrete hardening and the requirement of fast construction speed,and make full use of the strength and sTIF;%95%92;X*4fness of the hollow steel tube. But it also brings such problems,during the construction process of the structure,the CFST members suffered gradually increased long-term load,which makes concrete creep sustainably developing,concrete unloading,internal forces... |
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| Keywords: | CFST creep FEM load capacity |
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