摘要
采用自主研制的一套预应力碳纤维板(CFRP Plate)张拉和锚固机械装置,在12 m长的工字形钢梁上对国产碳纤维板材进行了预应力张拉和锚固试验;检测国产碳纤维板的基本材料力学性能,研究并分析该加固系统的预应力损失情况;运用光纤光栅传感元件(FBG)对长期预应力下的国产碳纤维板徐变性能进行了近4 000 h的观测。试验结果表明碳纤维板在锚固端的滑移极小,该预应力碳纤维板加固系统具有良好的机械性能;长期预应力下国产碳纤维板徐变很小,徐变性能对加固长期效果的影响不大。
A set of independently developed tensioning and anchoring device was used to test the material property of domestic CFRP plate on a 12 m long steel I-beam. The prestress loss of this strengthening system was researched and analysised. The creep behavior of domestic CFRP plate with long-term prestress was monitored by FBG sensor for about 4000 h. The experimental results show that （ 1 ） the slip of CFRP plate at the anchor end could be ignored, the strengthening system of the prestressed CFRP plate has good mechanical property ; （2） the creep values of homemade CFRP plate under long-term load are low, the creep behavior of the CFRP plate has little adverse influence on the strengthened structure.
出处
《公路交通科技》
CAS
CSCD
北大核心
2012年第1期70-74,133,共6页
Journal of Highway and Transportation Research and Development
基金
国家"十一"五科技支撑计划项目(2006BAJ03A10)
