FRP筋与海水海砂混凝土界面粘结性能研究进展
Research Progress of Interfacial Bond Properties Between FRP Bars and Seawater Sea-Sand Concrete
孔令艳 1刘树昌 1鲍玖文 1尹相振 2曹银龙 1崔祎菲1
作者信息
- 1. 青岛理工大学土木工程学院,青岛 266520
- 2. 上海市政工程设计研究总院(集团)有限公司青岛分公司,青岛 266000
- 折叠
摘要
利用海水和海砂替代淡水与河砂制备海水海砂混凝土(SWSSC)可有效解决岛礁建筑及海洋、港口工程结构建设施工材料运输成本高、周期长等问题,但是在海洋建筑物中使用普通钢筋与海水海砂混凝土会加剧钢筋的锈蚀.近年来,采用纤维增强聚合物(FRP)筋材替代普通钢筋应用于SWSSC有效解决了海水海砂中氯盐引起的钢筋锈蚀问题.本文总结了 FRP筋与SWSSC界面粘结性能退化规律,分析了不同环境下FRP筋-混凝土粘结强度的失效机理,并探讨了纤维类型、嵌入长度、筋材直径、FRP筋表面类型以及混凝土抗压强度等对其界面粘结性能影响,进一步归纳了现有的粘结滑移本构模型,为FRP筋在SWSSC中的实际应用提供科学依据.
Abstract
The use of seawater and sea-sand for replacing river water and river sand in the production of seawater sea-sand concrete(SWSSC)can effectively solve the problems of high transportation costs of construction material and long delivery time for islands and reefs,marine and harbor engineering structure construction.However,corrosion of steel bars is exacerbated by the use of ordinary steel bars and seawater sand concrete in marine structures.In recent years,the application of fiber-reinforced polymer(FRP)reinforcement instead of ordinary steel bars in SWSSC can effectively solve the problem of chloride-induced steel corrosion in SWSSC.In this paper,the degradation law of the interfacial bond performance between FRP reinforcement and SWSSC was summarized.The failure mechanisms of bond strength of FRP reinforcement-concrete under different environments were analyzed.The effects of fiber type,embedding length,reinforcement diameter,surface type of FRP reinforcement and compressive strength of concrete on interfacial bond performance were discussed.Furthermore,the existing bond-slip constitutive models were further summarized.This review can provide a scientific basis for practical application of FRP reinforcement in SWSSC.
关键词
海水海砂混凝土/FRP筋/破坏模式/粘结性能/本构模型Key words
seawater sea-sand concrete/FRP bar/failure mode/bond property/constitutive model引用本文复制引用
基金项目
NSCF-山东省联合基金(U2106219)
山东省高等学校青年创新团队计划(2021KJ019)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据