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首页> 外文期刊>Magazine of Concrete Research >Explicit analytical model for seismic shear strength of RC bridge columns
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Explicit analytical model for seismic shear strength of RC bridge columns

机译：钢筋混凝土桥柱抗剪强度的显式解析模型

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摘要

An explicit analytical model was developed to predict the seismic shear strength of reinforced concrete ( RC) bridge columns that failed in different modes including flexure, shear and flexure-shear failure. Shear demand was calculated without iteration based on sectional analysis. The shear capacity was divided into three contributions: the concrete compression zone (CCZ), concrete tension zone, and transverse reinforcements. Rankine's concrete failure criteria were used to determine the contribution of the CCZ, while modified compression field theory was applied to predict the other contributions. The three contributions were found to be dependent on the bottom section curvature based on axial-shear-flexure interaction. Seismic shear strength was obtained with a degraded shear capacity equal to the shear demand. Numerous tests were used to verify the proposed model and to assess the methods proposed in existing codes. Based on the proposed model, an application example and parameter analyses were conducted. The results showed that the proposed model produced better agreement with the test data than the methods of current codes. The contribution of the CCZ dominates RC bridge columns with low transverse reinforcements or high axial load ratios. The influence of the axial load ratio on seismic shear strength can be revealed accurately by the proposed model.
机译：建立了显式分析模型，以预测钢筋混凝土桥柱的地震抗剪强度，这些梁在包括挠曲，剪切和挠曲-剪切破坏在内的不同模式下均发生破坏。基于截面分析，无需迭代即可计算剪切需求。剪切能力分为三个部分：混凝土压缩区（CCZ），混凝土拉伸区和横向钢筋。兰金的具体破坏准则用于确定CCZ的贡献，而修改的压缩场理论则用于预测其他贡献。基于轴向-剪切-挠曲相互作用，发现这三个贡献取决于底部曲率。以等于剪切需求的退化的剪切能力获得了地震剪切强度。使用大量测试来验证所提出的模型并评估现有法规中提出的方法。基于所提出的模型，进行了应用实例和参数分析。结果表明，与当前的编码方法相比，所提出的模型与测试数据具有更好的一致性。 CCZ的贡献主要是具有低横向钢筋或高轴向载荷比的RC桥柱。所提出的模型可以准确地揭示出轴向载荷比对地震抗剪强度的影响。

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  • 来源
    《Magazine of Concrete Research》 |2019年第18期|935-948|共14页
  • 作者

    Wang Zhen; Wang Jingquan; Qi Jianan;

  • 作者单位

    Southeast Univ, Sch Civil Engn, Nanjing, Jiangsu, Peoples R China;

    Southeast Univ, Sch Civil Engn, Nanjing, Jiangsu, Peoples R China;

    Southeast Univ, Sch Civil Engn, Nanjing, Jiangsu, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    shear; structural analysis; structural design;

    机译：剪切;结构分析;结构设计;

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