Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Prestressed bridge pier with improved seismic ductility
The invention discloses a pre-stressed pier with improved seismic ductility, which is arranged between a bearing platform and a cover beam and comprises a pier body, the pier body is of a columnar structure made of concrete, and a plurality of longitudinal pre-stressed reinforcements parallel to the length direction are arranged in the pier body; two ends of each longitudinal prestressed reinforcement are respectively anchored on the bearing platform and the cover beam; and each longitudinal prestressed steel bar is an unbonded prestressed steel bar section in a shaping hinge area of the pier body, and the rest part is a bonded prestressed steel bar section. Under the action of constant live load, the effect of the prestressed tendons can be fully exerted, and the bearing capacity of the pier is improved; meanwhile, under the earthquake action, the overall ductility of the bridge pier can be fully improved, the ductility of the bridge pier is not lower than that of a common steel bar bridge pier, and the anti-seismic performance of the bridge pier is improved.
本发明公开了抗震延性改善的预应力桥墩，设置在承台和盖梁之间，包括桥墩本体，桥墩本体为采用混凝土制成的柱状结构，内部设有若干与长度方向平行的纵向预应力钢筋；每一纵向预应力钢筋的两端均分别锚固在承台和盖梁；每一纵向预应力钢筋在桥墩本体的塑形铰区域均为无粘结预应力钢筋筋段，其余部分均为有粘结预应力钢筋筋段。本发明在恒活载作用下，能充分发挥预应力筋的作用，提高桥墩的承载能力；同时在地震作用下，能够充分提高桥墩的整体延性，使其具备不低于普通钢筋桥墩的延性，提高桥墩的抗震性能。
Prestressed bridge pier with improved seismic ductility
The invention discloses a pre-stressed pier with improved seismic ductility, which is arranged between a bearing platform and a cover beam and comprises a pier body, the pier body is of a columnar structure made of concrete, and a plurality of longitudinal pre-stressed reinforcements parallel to the length direction are arranged in the pier body; two ends of each longitudinal prestressed reinforcement are respectively anchored on the bearing platform and the cover beam; and each longitudinal prestressed steel bar is an unbonded prestressed steel bar section in a shaping hinge area of the pier body, and the rest part is a bonded prestressed steel bar section. Under the action of constant live load, the effect of the prestressed tendons can be fully exerted, and the bearing capacity of the pier is improved; meanwhile, under the earthquake action, the overall ductility of the bridge pier can be fully improved, the ductility of the bridge pier is not lower than that of a common steel bar bridge pier, and the anti-seismic performance of the bridge pier is improved.
本发明公开了抗震延性改善的预应力桥墩，设置在承台和盖梁之间，包括桥墩本体，桥墩本体为采用混凝土制成的柱状结构，内部设有若干与长度方向平行的纵向预应力钢筋；每一纵向预应力钢筋的两端均分别锚固在承台和盖梁；每一纵向预应力钢筋在桥墩本体的塑形铰区域均为无粘结预应力钢筋筋段，其余部分均为有粘结预应力钢筋筋段。本发明在恒活载作用下，能充分发挥预应力筋的作用，提高桥墩的承载能力；同时在地震作用下，能够充分提高桥墩的整体延性，使其具备不低于普通钢筋桥墩的延性，提高桥墩的抗震性能。
Prestressed bridge pier with improved seismic ductility
抗震延性改善的预应力桥墩
ZHANG TAO (Autor:in) / YAN XINGFEI (Autor:in) / YANG TONG (Autor:in)
20.08.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
E01D
BRIDGES
,
Brücken
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