【作者】 张伟； 杨勇新； 关增伟；

【Author】 Zhang Wei~1 Yang Yongxin~2 Guan zengwei~1 (1 Department of Civil Engineering Dalian University of Technology Dalian 116024) (2 Central Research Institute of Building and Construction of MCC Group Beijing 100088)

【机构】 大连理工大学土木水利学院； 中冶集团建筑研究总院；

【摘要】 预应力碳纤维布加固钢筋混凝土梁可充分发挥CFRP的高强性能,又能抑制梁裂缝和变形的发展,使其在混凝土结构工程加固领域中得到广泛研究和应用。论文对碳纤维布加固混凝土梁的受力机理进行理论分析,考虑试验中各种预应力损失的影响因素,分析提出了计算预应力损失的估算公式,并借鉴预应力钢筋混凝土梁的结构理论,提出了考虑预应力损失的碳纤维布加固混凝土梁正截面承载力的计算方法和公式,与试验结果进行对比分析,表明公式的有效性和精度。更多还原

【Abstract】 The high-strength property of CFRP can be brought into full play by RC beams sthengthened with prestressed CFRP and this strengthening method can restrain the cracks and deformations’ processing of the beam, so it is widely researched and used in the strengthening field.Througth the theoretical analysis of the strengthened beams’ bearing mechanism and considering the influencing factors of various prestressing force losses,this paper proposes the estimation equations of these losses and the method of normal section bearing capacity in RC beams strengthened with prestressed CFRP according to the prestressed structure theory.The comparison results with the experiments support these equations’ effectiveness and precision.更多还原