海水环境下BFRP筋-海水海砂混凝土粘结耐久性
Bond durability of BFRP Bars in seawater sea sand concrete under environment of seawater
吴云飞 1常宇飞 2于志力 2周智 1欧进萍3
作者信息
- 1. 海南大学土木建筑工程学院,海南海口 570228
- 2. 大连理工大学建设工程学部,辽宁大连 116024
- 3. 哈尔滨工业大学(深圳)土木与环境工程学院,广东深圳 518055
- 折叠
摘要
对BFRP筋-海水海砂混凝土界面粘结耐久性开展长期浸泡侵蚀试验,分析真实海水浸泡后界面粘结性能的长期退化规律,浸泡时间分别是30 d、90 d、180 d、270 d、360 d、450 d、540 d和630 d.基于拉拔试验数据,对真实海洋环境下BFRP筋-海水海砂混凝土的长期极限粘结强度保留率进行模拟预测.结果表明:在真实海水浸泡630 d后,BFRP筋-海水海砂混凝土的极限粘结强度降低了66.13％,且0～270 d退化速率明显高于270d以后的退化速率.采用Bank模型并引入湿度修正系数,预测50 a后在海洋环境、室外环境及室内环境条件下极限粘结强度保留率分别为31.42％、57.15％和74.85％,为BFRP筋-海水海砂混凝土构件在沿海地区建筑中的应用提供参考.
Abstract
In the report,the long-term immersion erosion test on the interface bond durability of BFRP-seawater sea sand concrete was carried out to analyze the long-term degradation law of the interface bond property after re-al seawater immersion.The soaking time is 30 d,90 d,180 d,270 d,360 d,450 d,540 d,and 630 d,re-spectively.Based on the drawing test data,the long-term ultimate bond strength retention rate of BFRP bars and seawater sea sand concrete under real Marine environment was simulated and predicted.The results showed that the ultimate bond strength of BFRP bars and seawater sea sand concrete decreases by 66.13％after 630 d of im-mersion in real seawater,and the degradation rate of 0～270 d is significantly higher than that after 270 d.Bank model and humidity coefficient were used to predict that the retention rates of ultimate bond strength in Marine,outdoor and indoor environments is 31.42％,57.15％,and 74.85％,respectively.
关键词
BFRP筋/海水海砂混凝土/拉拔试验/真实海水/长期性能预测Key words
BFRP bars/seawater sea sand concrete/pull-out test/marine environment/long-term performance prediction引用本文复制引用
基金项目
海南省自然科学基金(2019RCO097)
出版年
2024
国家科技期刊平台
NSTL
万方数据