结构工程师2011，Vol.27Issue(4)：134-139,6.
二次受力下外粘纤维片材加固钢筋混凝土梁抗弯承载力
Bending Bearing Capacity of Reinforced Concrete Beams Strengthened with FRP Sheets Considering the Effect of the Second Loading
摘要
Abstract
Based on the strip method, a relay numerical calculation method for the bending bearing capacity of reinforced concrete beams strengthened with externally bonded FRP sheets considering the effect of the second loading was proposed. Comparing the calculation results with the existing test results, it was verified that the numerical calculation method is accurate enough to be used to calculate the bending bearing capacity of strengthened reinforced concrete beams. To consider the effect of the second loading on the bending bearing capacity of the beams, 18 numerical analysis specimens were designed. The bending bearing capacity for each beam strengthened under certain sustained load was calculated by using the proposed relay numerical calculation method, and it was compared with the corresponding value calculated by using the method recommended by the "Design code for strengthening concrete structures" ( GB 50367-2006). The results showed that method recommended by the national code may overestimate the bending bearing capacity of a strengthened beam whose damage model is the breaking of the steel bars or the crushing of the concrete but the steel bars remain in elastic stage.关键词
二次受力/外粘纤维片材加固/数值算法/条分法/接力计算Key words
second loading/strengthening with externally bonded FRP sheet/numerical calculation method/strip method/relay calculation引用本文复制引用
马来飞,顾祥林,李翔,王徽,孙凯..二次受力下外粘纤维片材加固钢筋混凝土梁抗弯承载力[J].结构工程师,2011,27(4):134-139,6.基金项目
国家科技支撑计划课题(2006BMJ03A07) （2006BMJ03A07）
