摘要
结合在役钢筋混凝土受拉构件承载力不足的特点,在8根钢筋混凝土构件轴拉试验基础上,对碳纤维布加固后预加载程度、持载程度对构件开裂荷载、极限荷载的影响进行分析,并提出受力构件的抗拉承载力计算式。研究表明,粘贴碳纤维布可以有效地提高二次受力钢筋混凝土轴拉构件极限承载力,限制裂缝宽度。所提公式与试验数据有较好的一致性,可供实际工程设计参考。该文研究成果对二次受力钢筋混凝土轴心受拉加固具有理论指导意义和工程应用价值。
The resisting capacity of existing reinforced concrete （RC） members subjected to uni-axial tension is insufficient for some cases. Testing of 8 RC members are carried out to investigate the cracking load and ultimate load of the RC members strengthened with externally bonded carbon fiber reinforced plastic （CFRP） sheets. Two factors, preloading degree and continual loading degree, are analyzed, and formulas for calculating the tension capacity of the RC members are put forward. Testing results show that the ultimate load of RC members can be increased and its crack width can be restricted if strengthened with CFRP sheets. The calculation formulas agree well with testing data, hence can act as reference to the practical projects.
出处
《工程力学》
EI
CSCD
北大核心
2008年第6期133-139,共7页
Engineering Mechanics
基金
大连理工大学海岸和近海工程国家重点实验室主任基金项目(LP0402)
关键词
碳纤维布
加固
二次受力
钢筋混凝土
轴心抗拉承载力
CFRP sheet
strengthening
secondary loaded
reinforced concrete
axial tension strength
