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EXPERIMENTAL STUDY ON BOND-SLIP PERFORMANCE OF CORRODED REINFORCED CONCRETE
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摘要: 通过对20个不同锈蚀率钢筋混凝土试件进行拉拔试验,分析不同锈蚀率试件的破坏形态、粘结力与滑移量的关系以及不同锈蚀率的钢筋混凝土粘结强度及滑移的变化规律,并给出粘结强度降低系数和滑移比的计算公式。在此基础上分析建立锈蚀钢筋混凝土的粘结滑移本构模型,经验证分析,证明该模型的有效性。该模型相对于国内外其他锈蚀钢筋混凝土粘结滑移本构模型较为简单,宜在实际工程中使用。Abstract: Based on pull-out test of 20 reinforced concrete specimens with different corrosion rate,their failure patterns,r elationship between bonding strength and slippage,variation laws of bonding strength and slippage were studied,and calculating formula for the reduction coefficient of bonding strength and slip ratio was proposed.Based on which,constitutive model of bond-slip performance for corroded reinforced concrete was set up.Relative to other domestic and foreign constitutive models,the model which is efficient by confirmatory factor analysis is relatively resultful,and it is fit to be used in actual engineering items．
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Key words:
- reinforced concrete /
- corrosion /
- bond-slip /
- constitutive model
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