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为了研究梁柱节点处梁的负弯矩区采用CFRP片材加固后的抗弯性能,进行了3根梁侧粘贴碳纤维片材加固梁和1根对比梁的抗弯试验。试验参数包括:CFRP层数、CFRP布置形式和节点处CFRP片材的锚固方式。试验结果表明:梁侧粘贴CFRP片材加固钢筋混凝土梁也同样可以提高梁的抗弯承载力;梁的弹性工作阶段明显延长,开裂荷载有很大提高;梁侧粘贴CFRP片材对控制裂缝宽度具有明显的作用。梁侧粘贴纤维片材的加固方法对裂缝宽度和变形要求严格的钢筋混凝土构件提供了一条有效的途径。
In order to study the flexural behavior of CFRP sheet after the negative moment region of the beam at the beam-column joints, the bending tests of three beams with carbon fiber sheet reinforcement and one comparison beam were carried out. The test parameters include the number of layers of CFRP, the layout of the CFRP and the way of anchoring the CFRP sheet at the node. The test results show that the CFRP sheet on the beam side can also improve the flexural capacity of the beam by adhering the CFRP sheet to the beam. The elastic working stage of the beam is obviously prolonged and the cracking load is greatly improved. Has a significant effect. The method of reinforcing the beam-side bonded fiber sheet provides an effective way for the reinforced concrete members with strict crack width and deformation requirements.