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Thermal in-plane buckling of concrete-filled steel tubular arches

机译：钢管混凝土拱的热面屈曲

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摘要

Concrete-Filled Steel Tubular (CFST) sections are widely incorporated in buildings, and are currently surging in popularity for use in arch bridges. Due to the inherent complex nature of arches, it is paramount that the behaviour of CFST arches under all possible mechanical and environmental environments be thoroughly investigated. Comprehensive studies on the behaviour of CFST arches at elevated temperatures are limited. In this paper, the pre-buckling behaviour and in-plane stability boundaries of circular CFST arches under radial and non-uniform thermal loading are analysed numerically. Geometric and material non-linearities are considered. The numerical simulations show that combined mechanical and thermal loading adversely effects the symmetric buckling resistance of CFST arches. Additionally, temperature effects may induce material failure in the confining steel tube and concrete core. Parametric studies demonstrate the influence of arch included angle, steel tube thickness and yield strength, arch slenderness and concrete compressive strength on failure time and mode.
机译：钢管混凝土（CFST）型材广泛应用于建筑物中，目前在拱桥中的使用正日益普及。由于拱门固有的复杂性，至关重要的是，全面研究CFST拱门在所有可能的机械和环境下的行为。关于CFST拱在高温下的行为的综合研究是有限的。本文对圆形CFST拱在径向和非均匀热载荷作用下的预屈曲行为和面内稳定边界进行了数值分析。考虑几何和材料非线性。数值模拟表明，机械载荷和热载荷的组合会对CFST拱的对称抗弯性产生不利影响。另外，温度效应可能会导致约束钢管和混凝土芯中的材料破坏。参数研究表明，拱形夹角，钢管厚度和屈服强度，拱形细长度以及混凝土抗压强度对破坏时间和破坏方式的影响。

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  • 来源
    《Tubular structures XVI》|2018年|101-108|共8页
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  • 作者

    Y. Bouras; E. Torres-Don; Z. Vrcelj;

  • 作者单位

    College of Engineering and Science, Victoria University, Melbourne, Australia;

    College of Engineering and Science, Victoria University, Melbourne, Australia;

    College of Engineering and Science, Victoria University, Melbourne, Australia;

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  • 正文语种 eng
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