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基于四对无粘结预应力混凝土梁与有粘结预应力混凝土梁的低周反复加载试验,较为系统地研究了上述两种预应力混凝土梁的延性、耗能性、变形恢复能力及破坏特征等抗震性能。研究表明:无粘结预应力混凝土梁的延性和变形恢复能力优于有粘结预应力混凝土梁,其延性系数平均高出20%;有粘结预应力混凝土梁的耗能能力优于无粘结预应力混凝土梁,其等效粘滞系数平均高出29.2%;有粘结预应力混凝土梁的承载力略高于无粘结预应力混凝土梁,其承载力平均高出7.42%;研究成果为不同工程情况下预应力梁的设计与选用提供参考。
Based on the low-cycle repeated loading tests of four pairs of unbonded prestressed concrete beams and bonded prestressed concrete beams, the ductility, energy dissipation, deformation recovery and failure characteristics of the two kinds of prestressed concrete beams are systematically studied Other seismic performance. The results show that the ductility and deformation recovery of unbonded prestressed concrete beams is better than that of prestressed concrete beams, and the ductility coefficient is higher by 20% on average. The energy dissipation capacity of prestressed concrete beams with bonded prestressed is better than that of non-bonded prestressed concrete beams The equivalent viscosity coefficient of prestressed concrete beams is 29.2% higher on average. The bearing capacity of bonded prestressed concrete beams is slightly higher than that of unbonded prestressed concrete beams, and the bearing capacity is 7.42% higher on average. The research results It provides a reference for the design and selection of prestressed beams under different engineering conditions.