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CALCULATION METHOD FOR DAMAGE INDEX OF RC BEAM UNDER FATIGUE LOADING
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摘要: 目前,国内外主要使用试验的方式研究钢筋混凝土梁疲劳弯曲性能。基于混凝土割线模量损伤与其塑性应变的线性关系,采用混凝土的塑性应变构造了损伤变量,并以此为依据推导了能够用于钢筋混凝土梁的弯曲疲劳全过程分析的损伤指标计算公式。通过与试验结果的比较,证明了该计算方法的适用性和可靠性。Abstract: At present, the existing researches on the fatigue performance of reinforced concrete beam are mainly madeby experiments．Based on the linear relationship between the damage of concrete secant modulus and plastic strain, the damage variable of the beam was established by plastic strain．And then, the calculation formula of damage indexwas derived, which could be used in the complete process analysis．Through the comparison with experimentalresults, the applicability and reliability of the formula was proved．
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Key words:
- RC beam /
- bending fatigue /
- damage index /
- plastic strain
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