An adequate bond between concrete and reinforcement along lap-splice length is necessary to prevent bond failure in lap-splice zone. Sometimes, lap splice has insufficient bond due to such various reasons as design and construction errors and needs strengthening. NSM and FRP confinement are highly promising methods compared to other available methods. NSM and NSM–CFRP confinement methods used for this purpose, and bonded length and concrete cover were considered as variables. The results reveal that the specifications of lap-spliced RC beams (load-bearing capacity, energy dissipation capacity, and ductility) are increased using strengthening methods. In the NSM, the lap-spliced beam’s strength would be increased, while CFRP leads to more ductility. Besides, load-bearing capacity and ductility led to more values when the concrete cover is increased.

沿着搭接长度，混凝土和钢筋之间必须有足够的粘结力，以防止搭接区粘结失败。有时，由于设计和构造错误等各种原因，搭接接头的粘合性不足，需要加强。与其他可用方法相比，NSM和FRP限制是非常有前途的方法。为此使用的NSM和NSM-CFRP约束方法以及粘结长度和混凝土覆盖层被视为变量。结果表明，采用加固方法可以提高搭接钢筋混凝土梁的规格（承载能力，能量消散能力和延性）。在NSM中，搭接梁的强度会增加，而CFRP会带来更大的延展性。此外，当增加混凝土覆盖层时，承载能力和延展性导致更多的价值。