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요약정보
高强钢绞线沿海环境锈蚀时变模型试验研究
Resource Type
Academic Journal
Authors
程鹏举
;
谢军军
;
潘鑫鑫
;
彭卫
Source
河南科技大学学报(自然科学版) / Journal of Henan University of Science & Technology(Natural Science)
. 42(2):76-81
Subject
沿海结构
高强钢绞线
锈蚀时变模型
Language
Chinese
ISSN
1672-6871
Online Access
Find it @ DONGA
초록
针对沿海建筑结构中常用的高强钢绞线材料,开展了锈蚀时变规律试验研究.建立了沿海地区真实环境与多功能气候模拟试验室环境之间的当量折算关系,分析了钢绞线锈蚀率随时间的变化规律,进行了钢绞线锈蚀形貌观测,分析蚀坑发展模型.试验结果表明:随着锈蚀时间的不断增加,钢绞线的抗蚀坑增长的能力逐渐减弱,锈蚀前期(1 a之内)平均锈蚀率缓慢增长,随后急剧增加.从初始锈蚀到第5年平均锈蚀率时变曲线拟合结果为幂函数形式.在1 a之内时,局部锈蚀中的点蚀为主要锈蚀形式,蚀坑形貌尺寸扩张迅速.实际服役1~5 a阶段,均匀锈蚀与局部锈蚀共同作用,锈蚀产物的不断堆积阻碍蚀坑扩展,导致蚀坑尺寸扩展缓慢.蚀坑长、宽、深随时间扩展曲线拟合结果为分段函数形式.
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