摘要
用碳纤维布对 1 6个足尺的钢筋混凝土梁作了增强处理 ,通过改变纤维布层数、配筋率等参数 ,试验研究了碳纤维布对于梁抗弯承载力和抗弯刚度的影响规律。试验证明 :碳纤维布对于提高梁的抗弯承载力效果十分显著 ,同时它对于增强梁的抗弯刚度也有良好的作用。用弹塑性截面分析法、非线性有限元法计算了梁的承载力与挠度 ,理论计算值与试验值吻合良好。
Sixteen large scale reinforced concrete beams are reinforced by the external bonding of high strength lightweight carbon fiber reinforced plastic (CFRP) plates to the tension face of the beams.A parametric analysis conducted to investigate the effects of CFRP reinforcement on flexural strength:deflection and failure mechanisms of repaired RC beams.CFRP reinforcement parameters considered in the analysis are:thickness and reinforcement ratio.An inelastic section analysis procedure is developed that accurately predicts the displacement response of the retrofitted beams.A nonlinear finite element method analysis is conducted that corroborates the results from the experimental study and inelastic section analysis.Predictions of the proposed models and finite element method analysis agree well with the experimental.The results of the experimental clearly indicate that significant strengthening of reinforced concrete beams can be realized by bonding small amount CFRP to the beams.
出处
《中国公路学报》
EI
CAS
CSCD
北大核心
2001年第2期45-51,共7页
China Journal of Highway and Transport
基金
山东省自然科学基金项目 (Q99F 0 6 )
教育部博士学科专项基金项目 (980 332 5 7)
关键词
碳纤维布
钢筋混凝土梁
抗弯承载力
弹塑性截面分析
非线性有限元
桥梁
增强处理
carbon fiber reinforced plastics (CFRP)
reinforced concrete beam (RC)
flexural strengthening
inelastic section analysis
nonlinear finite element method
