建筑结构学报2017，Vol.38Issue(12)：97-104,8.DOI:10.14006/j.jzjgxb.2017.12.011
内嵌CFRP板条加固钢筋混凝土梁的抗火性能试验研究
Experimental study on near-surface mounted CFRP strengthened RC beams subjected to fire
摘要
Abstract
Due to the weak mechanical property of CFRP under elevated temperatures,the externally bonded (EB) CFRP strengthening systems are normally vulnerable under fire.Comparatively,in a near surface mounted (NSM) CFRP strengthening system,CFRP reinforcement is protected from environment impact by concrete cover and adhesive,making it possible to have a better fire resistance.To figure out the potential fire resistive capacity,nine RC beams strengthened with near-surface mounted CFRP,two strengthened with external CFRP sheets and one reference RC beam were loaded to failure under the ISO 834 standard fire.Four main factors were experimentally studied,i.e.strengthening method (near surface mounted technique/externally bonded technique),adhesive (epoxy and magnesium-oxychloride cement),fire protection materials (thin intumescent fire retardant coating and thick fire retardant coating) and location of fire protection (notch protection/single-sided protection/three-sided protection).The test results indicate that NSM strengthened RC beans with appropriate protection can achieve the fire resistance of normal RC beams required by the present code.关键词
钢筋混凝土梁/CFRP板条/内嵌法加固/耐火极限/防火保护Key words
RC beam/CFRP strip/near surface mounted method/fire resistance/fire protection分类
建筑与水利引用本文复制引用
余江滔,田力康,徐延宁,刘媛,陆洲导..内嵌CFRP板条加固钢筋混凝土梁的抗火性能试验研究[J].建筑结构学报,2017,38(12):97-104,8.基金项目
国家自然科学基金项目(51478362). （51478362）
