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STUDY ON THE INFLUENCE OF INFUSED RESIN ON DURABILITY OF CFRP SHEETS UNDER THE ENVIRONMENT OF NORTH CHINA
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摘要: 碳纤维片材加固混凝土结构广泛应用于土木工程。仅就碳纤维本身而言,其性能受环境影响较小,作为FRP复合材料,其耐久性能还要受到树脂性能的影响。对目前土木工程加固常用的两种碳纤维片材及树脂耐久性进行了对比性试验研究。2年来已进行了16组共80个试件的试验。考察在华北地区自然环境条件下老化对其抗拉强度、伸长率和弹性模量等的影响。试验结果表明,浸渍树脂抗拉强度与碳纤维片材抗拉强度有一定关系,而伸长率和弹性模量的变化受树脂耐久性能的影响不明显。Abstract: Concrete structures reinforced by CFRP sheets are widely used in civil projects. As far as CFRP itself is concerned, environment takes little influence on its capability. However, as a complex material, capability of CFRP is influenced by the capability of resin. Durability of two common CFRP sheets and resin were compared and studied. Sixteen groups of sheets which are 80 sheets were tested in recent 2 years. Influence of nature environment on strength, extensibility and Young?? s modulus was investigated in north China. The results indicate that strength of CFRP sheets has relation to strength of infused resin, while durability has little influence on Young?? s modulus and extensibility.
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Key words:
- carbon fiber /
- resin /
- durability
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Tucson, Arizona: 1998(1-8) : 83-96 St eckel G L, Hawkins G F, Bauer J L. Environmental Durability of Composites for Seismic Retrofit of Bridge Columns. Proceedings of NIST Workshop on St andards Development for the Use of Fiber Reinforced Polymers for the Rehabilitation of Concrete and Masonry Structures. [2] 杨勇新, 王 敬, 张小冬. 碳纤维布加固混凝土结构耐久性能初步研究. 港工技术, 2002(2) : 25-27 [3] 朱 虹, 张继文. 结构加固过程中CFRP 布基本力学性能的检测,第二届全国土木工程用纤维增强复合材料(FRP) 应用技术学术交流会论文集. 昆明: 2002 [4] Woods J, Saadatmanesh H. Evaluation of the Long-Term Behavior of Bond of FRP??Steel Int erface. ASCE, 2003 [5] 肖建庄, 于海生, 秦灿灿. 复合材料加固混凝土结构耐久性研究.玻璃钢复合材料, 2003(2) : 16-21 [6] 岳清瑞, 杨勇新. 纤维增强复合材料与现代基础设施建设. 中国有色金属学报, 2004(5) [7] CECS 146: 2003 碳纤维片材加固混凝土结构技术规程 [8] 任慧韬. 纤维增强复合材料加固混凝土结构基本力学性能和长期受力性能研究: [ 博士学位论文]. 大连: 大连理工大学, 2003 -
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