受损对碳纤维加固框架节点的影响

Comparison and Analysis of Injured Frame's Joint and Uninjured Frame's Joint Strengthened by Carbon Fiber Reinforced Plastics

通过对碳纤维加固受损与未受损框架节点的试验研究,对二者在承载力、刚度、延性、耗能能力、强度退化及刚度退化等方面进行比较和分析.结果表明,对节点的极限承载力、延性提高影响小,使加固试件前期刚度比未加固试件降低,减小碳纤维加固对耗能能力的提高作用,削弱碳纤维加固对强度退化及刚度退化的改善作用.

The tests of uninjured frame's joint and injured frame's joint strengthened by carbon fiber reinforced plastics (CFRP) were conducted. We compare and analyse the two kinds of joints in strength, stiffness, deformation, the seismic capacity, strength degeneration and stiffness degeneration. The injured effect on the joint's strength and deformation is small,but the earlier stage stiffness of the injured sample is lower than the unstrengthened sample. The enhancement of seisimic capacity, strength and stiffness degeneration by reinforcement is reduced because of injury.