摘要
为客观评价寒冷地区混凝土桥梁的耐久性,根据寒冷地区除冰盐冻融环境特点,引入动弹性模量损失率以及质量损失率这2个混凝土抗冻耐久性评价指标,并突出除冰盐中氯离子的影响。采用[0,1]区间的方法量化指标的分级标准,减小权重取值时的主观性。利用层次分析法(AHP)与模糊区间向量理论相结合的方法,建立桥梁耐久性评价指标体系和评价模型。以长春市红咀子桥为工程实例,评价桥梁耐久性状态,评价结果与专家经验评定较为吻合。
In order to be objective in assessing frost durability of reinforced concrete bridges,two concrete frost durability evaluation indexs,the loss rate of the dynamic elastic modulus and the mass loss rate,were introducted according to the environmental characteristics of the environment of de-icing salt,freezing and thawing in cold regions,and the impact of chloride ions in de-icing salt was highlighted.The interval method was used to quantify the indecators grading standards,reducing the subjectivity when the weight value was determined.AHP and fuzzy interval vector theory method were combined to an establish bridge durability assessment index system and an evaluation model.The Hongzuizi Bridge located in Changchun city was selected as the project example to evaluate the durability condition of the selected bridge,and the conclusions conincide with experts＇ assessment.
出处
《中国安全科学学报》
CAS
CSCD
北大核心
2012年第9期85-89,共5页
China Safety Science Journal
