反复荷载作用下复合增强型钢筋混凝土框架结构的性能

摘要
FRP作为增强混凝土结构的材料得到日益广泛的应用。FRP一个有待开发和研究的应用便是在钢筋混凝土框架结构中的应用。但是，由于FRP的弹性，使得FRP钢筋混凝土构件的韧性较差和耗能性也较差。复合增强型FRP钢筋的增强作用可以弥补缺乏韧性的FRP钢筋混凝土构件的不足。在构件横截面上布置两层，FRP钢筋放置于外层，钢筋置于内层，这样就远离了碳化及氯离子侵蚀的影响。结合FRP箍筋，这种方法可提高钢筋混凝土构件的耐腐蚀性能。但是，目前的设计标准，并没有叙述标准FRP钢筋混凝土结构详细的抗震设计规定。特别是在抗震设计中详细的梁柱节点设计是一个关键问题。在近期的地震中，许多结构性坍塌引发了梁柱节点的损坏。鉴于此，研究这一问题可更好地了解GFRP和FRP钢筋混凝土在地震荷载作用下的情况

ABSTRACT
The use of FRP as reinforcement in concrete structures has been growing rapidly. A potential application of FRP reinforcement is in reinforced concrete (RC) frames. However, due to FRP's predominantly elastic behaviour, FRP-RC members exhibit low ductility and energy dissipation. Hybrid steel-FRP reinforcement can be a viable solution to the lack of ductility of FRP-RC members. Using two layers of reinforcement in a section, FRP rebars can be placed in the outer layer and steel rebars in the inner layer away from the effects of carbonation and chloride intrusion. Combined with the use of FRP stirrups, this approach can enhance the corrosion resistance of RC members.

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