两种锚固碳纤维布方法对比试验研究

Two Anchorage Methods Experimental Research on Carbon Fiber Sheets

碳纤维布加固混凝土梁负弯矩区常用的机械锚固法是角钢压条锚固法,但有限元分析结果表明柱侧钢板的限制使得角钢底板与梁顶变形不协调。试验结果验证了有限元分析的结论,并证明钢板压条锚固法可以有效锚固碳纤维布。锚固效果较好时,试件的"刚域"长度较大,且"刚域"长度的延伸对锚固效果的发挥有较大作用。

When negative moment section of beams are strengthened by using carbon fiber sheets, angle iron hold - down strip is a common mechanism anchorage method. But finite element analysis conclusion shows that the steel slab on the column side will restrict angle iron soleplate harmonized with the deformation of the beam. Experimental results demonstrated the conclusion of finite element analysis and proven that steel slab holddown strip could anchor carbon fiber sheets effectively. When anchoring effect was better, stiff field of the test sample was longer and the extension of stiff field length would play an important role to anchoring effect.