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首页> 外文期刊>Magazine of Concrete Research >Unified models for post-peak failure drifts of normal- and high-strength RC columns
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Unified models for post-peak failure drifts of normal- and high-strength RC columns

机译：正常和高强度RC色谱柱峰后故障漂移的统一模型

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摘要

Displacement-based design of reinforced-concrete (RC) columns requires reliable estimation of the drift capacity beyond the elastic range. Although many post-peak drift models exist for normal-strength RC (NSRC) columns, very limited work has been done in this area on high-strength RC (HSRC) columns. This paper evaluates the capability of existing drift models to predict post-peak drift capacity of both NSRC and HSRC columns. A comparative study is conducted using a comprehensive database of 190 RC columns (79 HSRC and 111 NSRC) from past experimental studies. The results of the comparative study indicate that most of the existing drift models overestimate post-peak drift capacity of HSRC columns, primarily because the influence of concrete strength has been ignored. This paper also proposes a unified set of empirical drift models that have a unique ability to predict post-peak drift capacity of lightly to moderately reinforced NSRC as well as HSRC columns. The new models can serve as tools for structural design engineers to estimate drift capacity of RC columns at an early design stage. Moreover, the models can assess the drift performance of RC columns in existing buildings and hence can also aid in decision-making regarding the need for retrofitting.
机译：钢筋混凝土（RC）立柱的基于位移的设计需要可靠地估算超出弹性范围的漂移能力。尽管对于正常强度RC（NSRC）色谱柱存在许多峰后漂移模型，但在此领域中对高强度RC（HSRC）色谱柱所做的工作非常有限。本文评估了现有漂移模型预测NSRC和HSRC色谱柱峰后漂移容量的能力。使用来自过去实验研究的190个RC柱（79个HSRC和111个NSRC）的综合数据库进行了比较研究。比较研究的结果表明，大多数现有的漂移模型都高估了HSRC柱的峰后漂移能力，这主要是因为忽略了混凝土强度的影响。本文还提出了一套统一的经验漂移模型，它们具有独特的能力来预测轻度至中度增强的NSRC以及HSRC柱的峰后漂移能力。新模型可以用作结构设计工程师在早期设计阶段估算RC柱的漂移能力的工具。此外，这些模型可以评估现有建筑物中RC柱的漂移性能，因此也可以帮助进行有关改造需求的决策。

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  • 来源
    《Magazine of Concrete Research》 |2018年第22期|1081-1101|共21页
  • 作者

    Raza Saim; Tsang Hing-Ho; Wilson John L.;

  • 作者单位

    Swinburne Univ Technol, Ctr Sustainable Infrastruct, Hawthorn, Vic, Australia;

    Swinburne Univ Technol, Ctr Sustainable Infrastruct, Hawthorn, Vic, Australia;

    Swinburne Univ Technol, Ctr Sustainable Infrastruct, Hawthorn, Vic, Australia;

  • 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

    failure; modelling; structural design;

    机译：失效;建模;结构设计;

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