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A platform for research: civil engineering, architecture and urbanism
High-ductility prestressed concrete strengthening structure and method
The high-ductility prestressed concrete strengthening structure comprises a concrete beam main body and anchor plates fixed to the two ends of the concrete beam main body, the concrete beam main body is made of cast-in-place concrete, a reinforcement cage is arranged in the concrete beam main body, and the reinforcement cage comprises a stirrup set and a composite compression steel bar bone. The composite compression reinforcing steel bar framework penetrates through the top of the stirrup set and is fixedly connected with the stirrup set, at least one corrugated pipe is fixedly arranged in the stirrup set in a penetrating mode, and an NPR pre-stress rib with the two ends extending out of the concrete beam body is arranged in the corrugated pipe. According to the invention, the composite reinforcement cage is used as the reinforcement in the compression area, the failure mode of crushing the concrete in the compression area of the NPR reinforced concrete structure is overcome, the tensile property of the prestressing tendons in the reinforced concrete structure is improved by adopting the NPR prestressing tendons, the ductility of the structure is improved, and the high ductility of the concrete structure is further improved.
本发明公开了高延性预应力混凝土强化结构及方法，包括混凝土梁主体及固定于混凝土梁主体两端部的锚板，混凝土梁主体为现浇混凝土，混凝土梁主体内设有钢筋笼，钢筋笼包括箍筋组及复合受压钢筋骨，复合受压钢筋骨穿设于箍筋组顶部并与其固定连接，箍筋组内穿设固定有至少一根波纹管，波纹管内设有两端部延伸出混凝土梁主体的NPR预应筋。本发明采用复合钢筋骨架作为受压区钢筋，克服了NPR钢筋混凝土结构受压区混凝土压碎的破坏模式，采用NPR预应筋提高了钢筋混凝土结构内预应力束的抗拉性能，改善了其结构的延性，进而提高了混凝土结构的高延性。
High-ductility prestressed concrete strengthening structure and method
The high-ductility prestressed concrete strengthening structure comprises a concrete beam main body and anchor plates fixed to the two ends of the concrete beam main body, the concrete beam main body is made of cast-in-place concrete, a reinforcement cage is arranged in the concrete beam main body, and the reinforcement cage comprises a stirrup set and a composite compression steel bar bone. The composite compression reinforcing steel bar framework penetrates through the top of the stirrup set and is fixedly connected with the stirrup set, at least one corrugated pipe is fixedly arranged in the stirrup set in a penetrating mode, and an NPR pre-stress rib with the two ends extending out of the concrete beam body is arranged in the corrugated pipe. According to the invention, the composite reinforcement cage is used as the reinforcement in the compression area, the failure mode of crushing the concrete in the compression area of the NPR reinforced concrete structure is overcome, the tensile property of the prestressing tendons in the reinforced concrete structure is improved by adopting the NPR prestressing tendons, the ductility of the structure is improved, and the high ductility of the concrete structure is further improved.
本发明公开了高延性预应力混凝土强化结构及方法，包括混凝土梁主体及固定于混凝土梁主体两端部的锚板，混凝土梁主体为现浇混凝土，混凝土梁主体内设有钢筋笼，钢筋笼包括箍筋组及复合受压钢筋骨，复合受压钢筋骨穿设于箍筋组顶部并与其固定连接，箍筋组内穿设固定有至少一根波纹管，波纹管内设有两端部延伸出混凝土梁主体的NPR预应筋。本发明采用复合钢筋骨架作为受压区钢筋，克服了NPR钢筋混凝土结构受压区混凝土压碎的破坏模式，采用NPR预应筋提高了钢筋混凝土结构内预应力束的抗拉性能，改善了其结构的延性，进而提高了混凝土结构的高延性。
High-ductility prestressed concrete strengthening structure and method
高延性预应力混凝土强化结构与方法
WANG QI (author) / JIANG BEI (author) / WANG PEIJUN (author) / ZHANG XIAO (author) / YU SHAOBIN (author) / LIU MEI (author) / LIU FANGZHOU (author) / HUANG YUBING (author)
2023-09-19
Patent
Electronic Resource
Chinese
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