A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
External prestressing reinforcement method for long-span bridge
The invention provides an external prestressing reinforcing method for a long-span bridge, and belongs to the technical field of methods for maintaining or reinforcing existing bridges. A bridge body serves as a processing object, an anchoring block is arranged at a middle cross beam of the bridge, a steering block is arranged at the bending moment changing position of the bridge body, then an external prestressed steel beam is pulled out from the anchoring block in the span direction, the external prestressed steel beam penetrates through the steering block, the tail end of the external prestressed steel beam is fixed to the bridge beam end, and the external prestressed steel beam is tensioned to the designed tensioning force. When the scheme is used for reinforcing the bridge, the usability and the durability of the bridge body structure can be improved, and the down-warping damage and the flexural capacity of the bridge body can be properly improved.
本申请提供一种大跨度桥梁体外预应力加固方法，属于维护或加固现有桥梁的方法技术领域。以桥梁主体为处理对象，先在桥梁的中横梁处设置锚固块，在桥梁主体的弯矩变化处设置转向块，再沿跨度方向自锚固块牵出体外预应力钢束，体外预应力钢束穿过转向块，末端固定于桥梁梁端，张拉体外预应力钢束至设计张拉力。将上述方案用于桥梁加固，可改善桥梁梁体结构的使用性和耐久性，适当改善梁体下挠病害和抗弯承载力等优点。
External prestressing reinforcement method for long-span bridge
The invention provides an external prestressing reinforcing method for a long-span bridge, and belongs to the technical field of methods for maintaining or reinforcing existing bridges. A bridge body serves as a processing object, an anchoring block is arranged at a middle cross beam of the bridge, a steering block is arranged at the bending moment changing position of the bridge body, then an external prestressed steel beam is pulled out from the anchoring block in the span direction, the external prestressed steel beam penetrates through the steering block, the tail end of the external prestressed steel beam is fixed to the bridge beam end, and the external prestressed steel beam is tensioned to the designed tensioning force. When the scheme is used for reinforcing the bridge, the usability and the durability of the bridge body structure can be improved, and the down-warping damage and the flexural capacity of the bridge body can be properly improved.
本申请提供一种大跨度桥梁体外预应力加固方法，属于维护或加固现有桥梁的方法技术领域。以桥梁主体为处理对象，先在桥梁的中横梁处设置锚固块，在桥梁主体的弯矩变化处设置转向块，再沿跨度方向自锚固块牵出体外预应力钢束，体外预应力钢束穿过转向块，末端固定于桥梁梁端，张拉体外预应力钢束至设计张拉力。将上述方案用于桥梁加固，可改善桥梁梁体结构的使用性和耐久性，适当改善梁体下挠病害和抗弯承载力等优点。
External prestressing reinforcement method for long-span bridge
大跨度桥梁体外预应力加固方法
ZHANG WEIWEI (author) / ZHAO TIEYONG (author) / WANG JIANFENG (author) / FENG QUNCHAO (author) / ZHAO WENXING (author) / ZHOU LIANG (author)
2024-01-12
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
Reinforcement Experiment of a Hollow Slab Bridge by External Prestressing
| Trans Tech Publications | 2012
External prestressing for Nottingham bridge
British Library Online Contents | 1998
Re Island Bridge External Prestressing
| British Library Conference Proceedings | 1990
External Prestressing in Two-Chord Large Span Structural Systems
| British Library Conference Proceedings | 1990