基于三参数Weibull函数的盐渍土地区钢筋混凝土短柱现场暴露试验研究  

Field Exposure Test of Reinforced Concrete Short Columns in Saline Soil Area Based on Three-parameter Weibull Function

作　　者：王成平[1] 张佳生 WANG Chengping;ZHANG Jiasheng(Xi’an Vocational and Technical College,Training Base for the Integration of Production and Education of Construction and Rail Transit,Xi’an,Shaanxi 710038,China;Xi’an Municipal Construction Engineering Quality Inspection Co.,Ltd.,Xi’an,Shaanxi 710038,China)

机构地区：[1]西安职业技术学院建筑与轨道交通产教融合实训基地,陕西西安710038 [2]西安市市政建设工程质量检测有限公司,陕西西安710038

出　　处：《水利与建筑工程学报》2021年第5期118-123,共6页Journal of Water Resources and Architectural Engineering

基　　金：陕西省教育厅专项科研计划项目(16JK2206)。

摘　　要：为研究盐渍土地区钢筋混凝土构件耐久性退化规律,采用钢筋混凝土短柱在盐渍土地区进行现场暴露试验,对试件进行周期性的电化学试验和超声波试验,分析试件钢筋锈蚀以及裂缝发展情况。以腐蚀电流密度和相对弹性模量为评价指标,基于三参数Weibull函数理论,对普通钢筋混凝土在盐渍土环境下的耐久性退化规律进行分析。结果表明:ω1呈先增加后减小的趋势,腐蚀电流密度则呈不断增加的趋势,钢筋在240 d时达到低锈蚀状态,在660 d时达到中等锈蚀状态。在1 050 d时钢筋混凝土试件达到破坏状态。In order to analyze the durability degradation of reinforced concrete members in saline soil areas,short reinforced concrete columns were adopted to conduct on-site exposure tests in the saline soil areas. Periodic electrochemical test and ultrasonic test were performed on the specimens,and the steel corrosion and crack formation of the specimens were analyzed. Taking corrosion current density and relative elastic modulus as evaluation indicators,based on the three-parameter Weibull function theory,the durability degradation law of ordinary reinforced concrete in saline soil environment is analyzed. The results showed that ω1 increased first and then decreased,while the corrosion current density showed an increasing trend. The steel bar reached a low corrosion state at 240 d and a medium corrosion state at660 d. At 1050 d,the reinforced concrete specimen reached the failure state.

关 键 词：耐久性 现场暴露实验 锈蚀评价参数 Weibull函数 

分 类 号：TU375.3[建筑科学—结构工程]