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首页> 外文期刊>Magazine of Concrete Research >Jacketing of reinforced concrete columns subjected to axial load
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Jacketing of reinforced concrete columns subjected to axial load

机译：承受轴向载荷的钢筋混凝土柱的护套

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摘要

This paper investigates the suitability of two existing confined concrete models, based on the concept of an effectively confined concrete core, to predict the behaviour of jacketed reinforced concrete columns when subjected to axial loads. Two types of jacketing with reinforced concrete (RC) were studied: full-length and partial jacketing. Consideration is also given to variations in the properties of the different concretes used in the jacket and the original column. Existing experimental data show that jacketing of RC columns using reinforced concrete enhances the axial load-carrying capacity, strain at peak axial load and post-peak ductility. However, conventional methods of analysis underestimate both the peak axial load and the corresponding strain. The two models were used to predict the entire load-strain relation of jacketed RC columns subjected to axial loading. The predictions agree well with available test results. For columns subjected to patch jacketing with only one set of stirrups, the predicted peak loads showed good agreement with experimental results. However, the corresponding strains were overestimated by as much as 20%.
机译：本文基于有效承压混凝土芯的概念，研究了两个现有承压混凝土模型的适用性，以预测夹套式钢筋混凝土柱在承受轴向载荷时的性能。研究了两种类型的钢筋混凝土护套（RC）：全长护套和部分护套。还考虑了用于护套和原始柱的不同混凝土的性能变化。现有的实验数据表明，使用钢筋混凝土的RC柱护套可以增强轴向承载能力，峰值轴向载荷下的应变以及峰后延性。但是，传统的分析方法低估了峰值轴向载荷和相应的应变。这两个模型用于预测承受轴向载荷的带夹套RC柱的整个载荷-应变关系。这些预测与可用的测试结果非常吻合。对于仅用一组箍筋进行贴片护套的柱子，预测的峰值载荷与实验结果显示出良好的一致性。但是，相应的菌株被高估了20％。

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