【摘要】 根据张拉前后预应力碳纤维筋的应变实测数据对 5根无粘结预应力碳纤维筋混凝土梁试件张拉前后的预应力损失情况进行了研究 ,结果表明造成预应力损失的主要原因是锚具变形、砼收缩以及分批张拉 ,相应的提出了配置普通粘结钢筋等措施更多还原

【Abstract】 Based on the measured value of the strain during stretching period, the prestressing loss of five post tensioned and unbonded concrete beams reinforced with CFRP bars are studied,the results show that the deformation of anchoring bolt,the shrinkage of concrete and unsymmetrical stretching are the main resons of prestressing loss,and corresponding suggestions such as joining deformed steel bars are put forward.更多还原