Cyclic behavior of damaged reinforced concrete columns repaired with high-performance fiber-reinforced cementitious composite
作者： Xiuling Li , Juan Wang , Yi Bao , Genda Chen
DOI: 10.1016/J.ENGSTRUCT.2017.01.015
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摘要: Abstract A high-performance fiber-reinforced cementitious composite (HPFRCC) prepared with high-volume fly ash is proposed to repair damaged reinforced concrete (RC) columns. This study aims at developing an effective and easy-to-apply repairing technique for RC columns in earthquake. Four 200 mm × 200 mm cross section 900 mm height were tested 85% of the load-carrying capacity under amplitude-increasing lateral loads a constant axial load. The repaired using HPFRCC: two heights (300 500 mm) processes (with without loads). effectiveness schemes was evaluated by comparing capacities, displacement ductility, stiffness, energy dissipation results indicated that ductility could be respectively 14% 29% higher than those original With during repairing, displayed better cyclic performance. Increasing beyond plastic hinge zone slightly improved ductility. Considering performance-to-cost ratio, it recommended HPFRCC 1.5 times depth or width column.
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