- 摘 要
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（1 同濟大學建筑工程系，上海 200092；2 先進土木工程材料教育部重點實驗室（同濟大學），上海 200092）
［摘要］對負載下碳纖維(CFRP)與鋼板復合加固鋼筋混凝土梁的抗彎性能進行了試驗研究和破壞模式分析，提出了復合加固梁的抗彎承載力公式。通過試驗和理論分析可知，復合加固大大提高了梁的抗彎承載力，并且負載對其抗彎承載力影響不大，當復合加固梁的破壞為CFRP拉斷時，其抗彎承載力幾乎不改變，并在此基礎上分析了負載對粘鋼、CFRP和復合加固3種加固方式的影響。結果表明，對于低強度混凝土梁，負載對粘鋼加固梁影響最大；而對于高強度混凝土梁，負載對CFRP加固梁影響最大。從加固設計角度考慮，低強度混凝土梁建議采用粘鋼加固，而高強度混凝土梁建議采用復合加固。
［關鍵詞］CFRP；鋼板；復合加固；負載；抗彎承載力；影響因素
Experimental research and parametric analysis on flexural performance of reinforced concrete beams combination strengthened with bonded CFRP and steel plates under sustaining load
Xiong Xueyu1,2, Xu Haifeng1（1 Department of Building Engineering, Tongji University, Shanghai 200092, China; 2 Key Laboratory of Advanced Civil Engineering Materials(Tongji University),Ministry of Education, Shanghai 200092, China）
Abstract:The experimental research on flexural performance of reinforced concrete beams combination strengthened with bonded carbon fiber reinforced polymer(CFRP) and steel plates and analysis of failure modes had been performed, the formula of the flexural capacity was put forward. Experimental research and theoretical analysis results show that combination strengthened method can effectively improve the flexural capacity of RC beams,and the sustaining load has not obvious effects on the flexural capacity and it even hardly changes when failure is CFRP tensile rupture.On the basis of the analyses, the sustaining load influenceing bonded steel plates, CFRP and combination strengthening was also analyzed. The results show that the sustaining load has the greatest influence on lower strength concrete beams reinforced with bonded steel plates, however, has the greatest influence on the higher strength concrete beams reinforced with CFRP. In the view of strengthened design, lower strength concrete beams reinforced with bonded steel plates and higher strength concrete beams reinforced with combination strengthened are suggested.
Keywords:CFRP; steel plate; combination strengthening; sustaining load; flexural capacity; influencing factors
上海市建設技術發(fā)展基金資助項目（B05043），上?，F(xiàn)代建筑設計（集團）有限公司研究課題（20061B006—結）。
作者簡介：熊學玉，博士，教授，Email：millerxuhaifeng@163.com。
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