摘要
无论是抗裂、减小正常使用状态下的裂缝宽度和挠度、延缓钢筋屈服还是提高构件极限承载力,预应力碳纤维加固梁的性能均优于非预应力碳纤维加固梁,而预应力水平的取值直接影响加固构件的力学性能.在国内外已有的预应力碳纤维布加固一次、二次受力梁试验研究的基础上,对最佳预应力水平的取值进行理论分析,建议碳纤维布最佳的预应力水平在60%cεfu左右.
Whether resisting crack or reducing the normal state of the crack width and the deflection or delaying the yield of reinforced or increasing member ultimate capacity, the strengthening effect of prestressed CFRP sheets contrasting with non-prestressed-CFRP-sheets is obvious, The value of Prestressed level directly affects the mechanical properties of components . Based on the existing domestic and international experimental studying on primary and secondary load for RC beam is strengthened with prestressed CFRP sheep. This paper analysize the best value of prestress level and propose CFRP Prestressed best level which is about 60% εcfu.
出处
《武汉工程大学学报》
CAS
2008年第4期15-19,共5页
Journal of Wuhan Institute of Technology
关键词
预应力水平
预应力CFRP布
加固
C程序
数值模拟
prestress level
prestressed CFRP sheets
strengthening
C program
the calculations of numerical simulation
