预应力CFRP板加固混凝土梁的抗裂性能  

Crack Performance of Concrete Beams with Prestressed CFRP Plates

作　　者：陈华[1] 邓朗妮[1] 康侃[1] 张鹏[1] 

机构地区：[1]广西工学院土木建筑工程系,广西柳州545006

出　　处：《桂林理工大学学报》2013年第1期65-68,共4页Journal of Guilin University of Technology

基　　金：国家自然科学基金项目(50768002);广西自然科学基金重点项目(桂科自0832002Z);广西科技开发计划项目(桂科攻0992001-13)

摘　　要：预应力碳纤维(CFRP)板加固混凝土梁可以有效地提高梁的抗裂度并减小梁的裂缝宽度,但我国现行规范以及ACI 440.4R-02规范中都没有相关的预应力CFRP板加固混凝土梁的设计条款。通过理论分析,得出了预应力CFRP板加固混凝土梁的抗裂度计算公式;考虑了CFRP板与普通预应力钢筋形状、粘结面等的差异,对我国《混凝土结构设计规范》中有关受弯构件最大裂缝宽度的计算公式进行了修正。基于提出的公式,对预应力CFRP板加固混凝土梁的单调静载试验结果进行计算对比,结果显示吻合良好。With prestressed carbon fiber reinforced polymer（CFRP） plates,the strengthen reinforced concrete beams can increase cracking moments and maximum crack width.At present,there is no design provision for strengthened concrete beams with prestressed CFRP plates in current codes and ACI 440.4R-02 code.According to theoretical analysis,the cracking moment calculation methods of the prestressed CFRP plates for strengthen-reinforced concrete beams are presented.The maximum crack width calculation methods in current codes for concrete structure are modified with equivalent CFRP plates,bond behavior of CFRP plates and the bond area.Experimental studies on concrete beams strengthened with prestressed CFRP plates are carried out to verify the proposed formulas.Comparisons show that the calculated values agree well with the experimental results.

关 键 词：预应力CFRP板 混凝土梁 抗裂度 最大裂缝宽度 

分 类 号：TU746.3[建筑科学—建筑技术科学]