摘要
用数值试验方法分析了破坏过程中FRP板中的应力传递过程,即从FRP承担拉应力起,到应力增大直至最后失去承载力.通过对粘贴不同FRP板长度对于加固后结构的力学性能的影响的分析,可以看出FRP板的长度直接影响结构破坏时的极限应变.在适当的范围内,FRP板的加固长度越大,梁的极限应变和梁的韧性越大,FRP板中承担的拉应力和外荷载位移越大,混凝土梁破坏时底部产生的裂缝越多;FRP板越短,越容易产生剥离破坏.
The stress transmission process in the FRP sheet was analyzed numerically during the failure process of the FRP reinforced concrete specimen,characterized as the stress initiation,propagation and final decay of the loading capacities.Based on the examination of the mechanical properties of reinforced concrete structures under different FRP sheet lengths,it was found that the ultimate strain and the toughness,as well as the loading capacity and tensile stress sustained by the FRP sheet,increase with the RFP sheet length,and more cracks are also distributed on the bottom of the beam.For the shorter FRP sheet,the debonding failure is prone to occurring.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2011年第10期1495-1498,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50874024
51074042)
霍英东教育基金会资助项目(122023)
关键词
数值试验
混凝土裂纹
变形与破坏
FRP板长度
破坏过程
numerical test
concrete cracking
deformation and failure
FRP sheet length
failure process
