Numerical Modelling of the Behavior of Steel-Concrete Composite Columns of Different Types of Circular Cross Section Subject to Lateral Impact

K. Rahim
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引用次数: 1

Abstract

Concrete filled steel tube (CFST) column is an important type of structural member and its protective design is essential to enhance its structural performance under various dynamic loads. In accordance to Abdel Rahim [1], the previously carried out studies on CFST columns tried to determine how to improve their structural response under various loadings, such as axial compression, lateral impact, blast, seismic, etc. Apart from investigations on transverse impact loading, the majority of the other studies on CFST under various loads established solutions and protective measures. Therefore, the departure point for this short communication is the need to improve the performance of CFST under transverse impact loads. The study carried out by Zhao et al. [2] shows considerable residual displacement magnitudes after impact. Retaining the geometrical properties, boundary conditions, loading conditions and type of numerical analysis employed in that investigation, this short communication proposes novel designs in terms of cross-sectional configuration and smart materials to be applied on the specimens tested by Wang et al. [3], to improve the performance of CFST columns under lateral impact loading namely reducing their strength degradation under impact, increasing their energy dissipation capacity, reducing the damage to the steel tubes and concrete fill and reducing the residual and maximum displacements.
不同圆截面型钢-混凝土组合柱侧向冲击性能数值模拟
钢管混凝土柱是一种重要的结构构件,其防护设计对提高钢管混凝土在各种动荷载作用下的结构性能至关重要。根据Abdel Rahim[1]的研究,以往对钢管混凝土柱的研究试图确定如何提高其在各种荷载下的结构响应,如轴压、侧向冲击、爆炸、地震等。除横向冲击荷载研究外,其他针对不同荷载作用下钢管混凝土的研究大多建立了解决方案和防护措施。因此,这种短通信的出发点是需要提高CFST在横向冲击载荷下的性能。Zhao等[2]的研究表明,撞击后存在相当大的残余位移量。本文保留了该研究中使用的几何特性、边界条件、加载条件和数值分析类型,并在Wang等人[3]所测试的试件上提出了断面配置和智能材料方面的新设计,以提高CFST柱在侧向冲击荷载下的性能,即减少其在冲击下的强度退化,增加其耗能能力。减少对钢管和混凝土填料的损伤,减少残余位移和最大位移。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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