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首页> 外文会议>International Conference on Health Monitoring of Structure, Material and Environment;HMSME 2007 >Calculation of Circular Reinforced Concrete Long Columns Confined with CFRP Sheets under Axial Compression
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Calculation of Circular Reinforced Concrete Long Columns Confined with CFRP Sheets under Axial Compression

机译：CFRP约束的圆形钢筋混凝土长柱轴心受压计算。

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摘要

Owing to some problems in their stability of building structures in service, the general software ANSYS is adopted to establish the finite element models of circular reinforced concrete long columns confined with CFRP sheets under axial compression and used to analyze the influence of CFRP sheets to these structural buckling loads. Height of columns, layers of CFRP sheets, concrete grade, longitudinal rebar diameter, stirrup diameter and stirrup spacing are some factors considered. Based on the nonlinear finite element buckling analysis of these columns, some major conclusions are summarized as follows: (1) The enhanced level of buckling load descends with columns height's increasing; (2) The buckling load rises along with the increasing number of layers on a nonlinear manner; (3) The buckling load's increment is hardly dependent of concrete grade, longitudinal rebar diameter, stirrup diameter and stirrup spacing; (4) The improvement is not very obvious to use CFRP sheets to strengthen the structures when their stabilities go wrong. Influences of CFRP sheets to circular reinforced concrete long columns under axial compression can be found by analyzing the stability of these columns, and the analysis results are available for the strengthening of some structures in practice.
机译：由于在役建筑结构的稳定性存在一些问题，采用通用软件ANSYS建立了受CFRP约束的圆形钢筋混凝土长柱在轴向压缩下的有限元模型，并分析了CFRP板对这些结构的影响。屈曲载荷。考虑了柱高，CFRP板层数，混凝土等级，钢筋纵向直径，箍筋直径和箍筋间距。在对这些柱的非线性有限元屈曲分析的基础上，得出以下主要结论：（1）屈曲载荷的增强水平随柱高的增加而减小; （2）屈曲载荷随着层数的增加而非线性增加。 （3）屈曲荷载的增量几乎不受混凝土等级，钢筋纵向直径，箍筋直径和箍筋间距的影响。 （4）当CFRP板的稳定性出现问题时，使用CFRP板加固结构的改善不是很明显。通过分析CFRP板对圆柱型钢筋混凝土长柱的轴向稳定性的影响，可以分析它们的稳定性，分析结果可为实际中的某些结构加固提供依据。

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