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首页> 外文期刊>Bulletin of earthquake engineering >Lateral behavior of rectangular concrete columns reinforced by partially debonded high-strength reinforcements based on a proposed equivalent stress block
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Lateral behavior of rectangular concrete columns reinforced by partially debonded high-strength reinforcements based on a proposed equivalent stress block

机译：基于拟议的等效应力块的部分剥离的高强度增强件加强了矩形混凝土柱的横向行为

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This paper used partially debonded high-strength reinforcements (PDHSR) to develop self-centering reinforced concrete (RC) columns. The experimental results showed that the RC columns with PDHSRs had slighter seismic damage, more stable seismic resistance and smaller residual drift up to a large lateral drift compared with the RC columns with normal steel rebars. To simulate the lateral behavior of RC columns with PDHSRs for satisfying the requirements of performance-based design, this paper emphasized the prediction of the lateral behaviors of the RC columns with PDHSRs subjected to seismic load. Firstly, the basic information of the experiments was briefly introduced, secondly, the calculation method considering the steel-bond slip to predict the lateral behaviors of the RC columns was described in detail. Furthermore, several equations for calculating the neutral axis depth of the rectangular column section were proposed without enormous mathematical iterations. Several RC columns with normal steel rebars and the tested columns with PDHSRs were used to validate the applicability of the proposed calculation method. The results proved that the lateral behaviors of them can be predicted with good agreement. Finally, a parametric study was conducted based on the proposed calculation method to discuss the influences of some key structural parameters on the lateral behaviors of the RC columns with PDHSRs. Through regressive analysis, a simplified formula was developed for evaluating the effective lateral yield stiffness of RC columns with PDHSRs.
机译：本文采用部分脱胶高强钢筋（PDHSR）研制自定心钢筋混凝土（RC）柱。试验结果表明，与普通钢筋混凝土柱相比，采用PDHSR的钢筋混凝土柱具有更轻的地震损伤、更稳定的抗震性能和更小的残余位移，直至出现较大的侧向位移。为了模拟带PDHSR钢筋混凝土柱的侧向性能，以满足基于性能的设计要求，本文着重对带PDHSR钢筋混凝土柱在地震荷载作用下的侧向性能进行了预测。首先简要介绍了试验的基本情况，然后详细介绍了考虑钢筋粘结滑移的钢筋混凝土柱侧向性能计算方法。此外，还提出了几个计算矩形柱截面中性轴深度的公式，无需进行大量的数学迭代。通过几个普通钢筋混凝土柱和PDHSR试件，验证了所提出的计算方法的适用性。结果表明，可以很好地预测它们的侧向行为。最后，基于所提出的计算方法进行了参数研究，讨论了一些关键结构参数对带PDHSR钢筋混凝土柱侧向性能的影响。通过回归分析，建立了一个简化的公式，用于评估带PDHSR的钢筋混凝土柱的有效侧向屈服刚度。

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