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首页> 外文期刊>Magazine of Concrete Research >Probabilistic indicator to classify the failure mode of reinforced-concrete columns
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Probabilistic indicator to classify the failure mode of reinforced-concrete columns

机译：用于对钢筋混凝土柱破坏模式进行分类的概率指标

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摘要

In order to reconcile the large dispersion in classifying the failure mode of reinforced-concrete (RC) columns, a probabilistic indicator was developed by comparing the flexural strength with the shear strength. Specifically, a simplified truss-and-arch model was first built to develop the flexural strength model and shear strength model of RC columns to derive an explicit expression for the probabilistic indicator. The five unknown model parameters in the explicit expression were then carefully defined as random variables to represent the prevailing uncertainties with prior distribution ranges from 0 to 1.0. An experimental database was constructed to estimate the posterior cumulative distribution of the five unknown model parameters by comparing the measured strengths. Moreover, by defining unity as the threshold value of the probabilistic density function of the probabilistic indicator, the probability categorising the damage of RC columns into a specific failure mode was determined for each specimen. Finally, as a by-product of developing the probabilistic indicator, a closed-form expression of a probabilistic model in terms of a mean prediction model and a standard deviation prediction model was developed for engineers to estimate the required minimum transverse reinforcement ratio of RC columns.
机译：为了协调钢筋混凝土（RC）柱破坏模式的大范围分散，通过比较抗弯强度和抗剪强度，开发了一种概率指标。具体而言，首先建立简化的桁架拱模型，以开发RC柱的抗弯强度模型和抗剪强度模型，以得出概率指标的显式表达式。然后将显式表达式中的五个未知模型参数仔细定义为随机变量，以表示先验分布范围为0至1.0的主要不确定性。建立了一个实验数据库，通过比较测得的强度来估计五个未知模型参数的后累积分布。此外，通过将统一性定义为概率指标的概率密度函数的阈值，可以为每个样本确定将RC柱的损坏分类为特定破坏模式的概率。最后，作为开发概率指标的副产品，根据平均预测模型和标准偏差预测模型，开发了概率模型的闭式表达式，以便工程师估算RC柱所需的最小横向配筋率。

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  • 来源
    《Magazine of Concrete Research》 |2019年第14期|734-748|共15页
  • 作者

    Ning Chao-Lie; Feng De-Cheng;

  • 作者单位

    Tongji Univ, Shanghai Inst Disaster Prevent & Relief, Shanghai, Peoples R China;

    Southeast Univ, Minist Educ, Key Lab Concrete & Prestressed Concrete Struct, 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

    load transfer; plain concrete; structural analysis;

    机译：荷载传递;普通混凝土;结构分析;

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