A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Method for improving bearing capacity of truss girder bridge through external prestressed tendons
The invention discloses a method for improving the bearing capacity of a truss girder bridge through external prestressed tendons. In the implementation process, a truss main beam, longitudinal prestressed tendons, oblique prestressed tendons, supports, side stand columns, supporting cross beams and anchoring devices need to be used. The side stand columns are arranged at vertical web members close to the two sides of truss pier supports and used for anchoring the oblique prestressed tendons and transmitting vertical loads of anchoring forces to the piers. The supporting cross beams are arranged along the span, one side of each of the oblique prestressed tendons is anchored to one supporting cross beam, and the other sides of the oblique prestressed tendons are anchored to the side stand columns; and opposite pulling and anchoring are conducted between each pair of supporting cross beams parallel to the lower chord of the truss main beam through longitudinal prestressed tendons, so that the truss main beam is reinforced and tensioned in the vertical plane. The bending moment of the midspan area of the truss girder can be effectively reduced, the load bending moment is relatively balanced and reasonable in the span direction, the girder height of the truss is reduced, the sectional dimension of a truss rod piece is uniformized, and industrial manufacturing and design and connection of gusset plates are facilitated.
本发明公开了一种用体外预应力筋提高桁架梁桥承载能力的方法。本发明实现的过程中需要用到桁架主梁、纵向预应力筋、斜向预应力筋、支座、侧立柱、支撑横梁及锚固装置。侧立柱设置于紧邻桁架桥墩支座两侧的竖腹杆处，用于锚固斜向预应力筋并将锚固力的竖向荷载传递到桥墩上；沿跨设置有支撑横梁，斜向预应力筋的一侧锚固在支撑横梁上，另一侧与侧立柱锚固；在与桁架主梁下弦杆平行的每对支撑横梁间用纵向预应力筋进行对拉及锚固，以实现对桁架主梁在竖向平面内的加强和张拉。本发明能够有效减少桁架梁跨中区域的弯矩，并使荷载弯矩沿跨方向相对均衡合理，降低桁架的梁高，使桁架杆件截面尺寸的均匀化，便于工业化制造和节点板的设计连接。
Method for improving bearing capacity of truss girder bridge through external prestressed tendons
The invention discloses a method for improving the bearing capacity of a truss girder bridge through external prestressed tendons. In the implementation process, a truss main beam, longitudinal prestressed tendons, oblique prestressed tendons, supports, side stand columns, supporting cross beams and anchoring devices need to be used. The side stand columns are arranged at vertical web members close to the two sides of truss pier supports and used for anchoring the oblique prestressed tendons and transmitting vertical loads of anchoring forces to the piers. The supporting cross beams are arranged along the span, one side of each of the oblique prestressed tendons is anchored to one supporting cross beam, and the other sides of the oblique prestressed tendons are anchored to the side stand columns; and opposite pulling and anchoring are conducted between each pair of supporting cross beams parallel to the lower chord of the truss main beam through longitudinal prestressed tendons, so that the truss main beam is reinforced and tensioned in the vertical plane. The bending moment of the midspan area of the truss girder can be effectively reduced, the load bending moment is relatively balanced and reasonable in the span direction, the girder height of the truss is reduced, the sectional dimension of a truss rod piece is uniformized, and industrial manufacturing and design and connection of gusset plates are facilitated.
本发明公开了一种用体外预应力筋提高桁架梁桥承载能力的方法。本发明实现的过程中需要用到桁架主梁、纵向预应力筋、斜向预应力筋、支座、侧立柱、支撑横梁及锚固装置。侧立柱设置于紧邻桁架桥墩支座两侧的竖腹杆处，用于锚固斜向预应力筋并将锚固力的竖向荷载传递到桥墩上；沿跨设置有支撑横梁，斜向预应力筋的一侧锚固在支撑横梁上，另一侧与侧立柱锚固；在与桁架主梁下弦杆平行的每对支撑横梁间用纵向预应力筋进行对拉及锚固，以实现对桁架主梁在竖向平面内的加强和张拉。本发明能够有效减少桁架梁跨中区域的弯矩，并使荷载弯矩沿跨方向相对均衡合理，降低桁架的梁高，使桁架杆件截面尺寸的均匀化，便于工业化制造和节点板的设计连接。
Method for improving bearing capacity of truss girder bridge through external prestressed tendons
一种用体外预应力筋提高桁架梁桥承载能力的方法
XIANG YIQIANG (author) / GAO CHAOQI (author)
2020-07-10
Patent
Electronic Resource
Chinese
IPC:
E01D
BRIDGES
,
Brücken
PRESTRESSED STEEL TUBULAR TRUSS GIRDER BY EXTERNAL PRESTRESSING METHOD
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