EXPERIMENTAL STUDY ON BOND PERFORMANCE DETERIORATION BETWEEN CORRODED BARS AND CONCRETE UNDER FATIGUE LOADS
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摘要: 钢筋与混凝土间的粘结性能是钢筋混凝土结构形成的关键,而锈蚀和疲劳荷载均可能对粘结性能造成不利影响。通过钢筋开槽内贴应变片直流电室内快速锈蚀手段对13个试件在疲劳荷载作用下锈损后钢筋与混凝土之间的粘结性能退化规律进行研究,得出了试件疲劳加载次数、钢筋锈蚀量及钢筋与混凝土滑移之间的关系,得到了钢筋粘结段内部粘结应变分布的劣化规律,分析了锈后钢筋混凝土构件疲劳粘结破坏的形态。Abstract: Bond performance is the key of reinforced concrete between concrete and bars,however either corrosion or fatigue load makes bond performance deteriorate.Using a fast electric current corrosion testing of 13 bars with strain gauge placed in a machined axial cavity,the bond performance between bars and concrete under fatigue loads has been investigated,the relationship between the number of fatigue loads,corrosion amount,bond-slip of bars and concrete has been found, the degradation law of the distribution of strain in bond area of bars has also been obtained.
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Key words:
- corrosion /
- bond performance /
- deterioration
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