摘要
对疲劳损伤混凝土进行快速碳化试验,研究不同疲劳损伤度(0、0.2、0.4、0.6、0.8)混凝土碳化深度经时变化规律;探讨疲劳损伤对受拉、受压、无应力状态下混凝土碳化性能影响;同时,对疲劳损伤混凝土碳化后抗折强度变化规律进行分析。结果表明:疲劳损伤混凝土碳化深度服从Fick第一定律;疲劳损伤对混凝土受拉区及受压区碳化过程具有加速作用,但对无应力区碳化作用不明显,且受拉区碳化深度大于受压区;疲劳损伤混凝土碳化后抗折强度随着损伤度、碳化龄期的增大而不断降低。
Based on accelerated carbonation test of fatigue-damaged concrete, carbonation depth and the rupture strength at different carbonation age were studied for concretes with different degree of fatigue （ 0,0.2,0. 4,0.6, O. 8 ）, and carbonation depth at different stress areas ws also studied. The test results showed the carbonation depth of fatigue-damaged concrete could subject to the first law of Fick, and a carbonation accelerating effect was caused by flexural fatigue. There was little effect on less stressed area. The carbonation depth of tension area was larger than that of compression area. Moreover, the higher the degree of fatigue and the longer the carbonation age, the lower the rupture strength of fatigue-damaged concrete.
出处
《工业建筑》
CSCD
北大核心
2016年第8期123-126,118,共5页
Industrial Construction
基金
交通运输部应用基础研究项目(2013319223110)
关键词
弯曲疲劳
混凝土
碳化
抗折强度
flexural fatigue
concrete
carbonation
rupture strength
