CFRP筋-高强钢筋/高强混凝土柱的抗震性能

为了研究高强钢筋和碳纤维增强树脂复合材料(CFRP)混合配筋/高强混凝土柱的抗震性能，对CFRP筋-高强钢筋混合配筋的高强混凝土柱进行了低周反复荷载试验和有限元分析，研究了CFRP筋的粘结条件、不同轴压比以及高强混凝土种类等参数对其抗震性能的影响。结果表明:所有的高强混合配筋高强混凝土柱均发生延性破坏；在相同条件下，高强混合配筋混凝土中分别添加了钢纤维活性粉末和钢纤维后，表现出更好的耗能能力和延性；有粘结CFRP筋混合配筋高强混凝土柱比无粘结CFRP筋混合配筋柱的变形能力和承载力分别提高了9.6%和17.1%，但是延性系数降低了22.5%；在延性破坏的条件下，随着轴压比的增加，CFRP筋-高强钢筋混合配筋柱的屈服强度和极限强度明显增大，极限位移和耗能能力也逐渐减小；高强钢筋和CFRP筋配筋率越高，高强混合配筋柱的极限承载力和变形能力越大。 

Seismic behavior of high-strength concrete columns reinforced with CFRP tendons and high-strength steels

In order to investigate the seismic performance of high-strength concrete columns reinforced with carbon fiber reinforced polymer (CFPR) and high-strength steel, hybrid reinforced concrete columns with CFRP tendons and high-strength steels and two high-strength reinforced concrete columns were prepared and tested. The experimental and numerical results were used to explore the factors influencing the seismic performance of high strength concrete columns, including the bonding condition of CFRP tendons, axial compression ratio and concrete type. The results show that all high-strength concrete columns with CFRP tendons and high-strength steel have ductile failure. The concrete columns with steel fiber or reactive powder concrete (RPC) exhibit good ductility and energy dissipation under the same condition. The deformation and bearing capacity of the high-strength concrete column with bonded CFRP tendons are 9.6% and 17.1% higher than that of unbonded hybrid reinforced concrete columns, but the ductility coefficient is lower than 22.5%. Under ductile failure conditions, as the axial pressure ratio increases, the bearing capacity of high-strength concrete columns is improved significantly, but the energy dissipation capacity and plastic deformation capacity decrease obviously. The higher ratio of high-strength steels and CFRP tendons, the ultimate bearing capacities and deformation capacities of high-strength hybrid reinforcement columns are higher.