Novel truss type partition plate for stiffening steel box girder of suspension bridge and operation method of novel truss type partition plate

Abstract

The invention discloses a novel truss type partition plate for a stiffening steel box girder of a suspension bridge and an operation method of the novel truss type partition plate, and belongs to thetechnical field of bridge design. The novel truss type partition plate comprises an upper transverse rib, a lower transverse rib, inclined struts, gusset plates, stiffening rib plates and high-strength bolts, wherein the upper transverse rib and the lower transverse rib are annularly welded with a top plate, a bottom plate and a web of the stiffening box girder, the gusset plates are arranged at aplurality of nodes of flanges of the upper transverse rib and the lower transverse rib, the adjacent gusset plates are connected through inclined struts, the inclined struts are connected with the gusset plates through high-strength bolts, and a plurality of stiffening rib plates are arranged at key positions of the gusset plates, the upper transverse rib and the lower transverse rib. The invention further provides an operation method of the novel truss type partition plate for the stiffening steel box girder of the suspension bridge. According to the technical scheme, the material utilization rate is high, the weight of the partition plate is greatly reduced, remarkable economic benefits are achieved, all the steel components and the main beam sections are manufactured in a factory together, the steel components are small components, installation and welding are convenient, the construction quality is controllable, the inclined struts and the node plates are connected in a bolted mode, and later maintenance and replacement are convenient.

Description

technical field [0001] The invention belongs to the technical field of bridge design, and relates to a novel truss type partition plate of a reinforced steel box girder of a suspension bridge and an operation method thereof. Background technique [0002] The truss-type partition is extended from the mature frame-type partition of large-section box girders in China. The truss partition makes the box very transparent, has a good vision, and is convenient for internal maintenance. It is also a natural trend in the development of large-section steel box girders. , excavate the excess partition area, the upper part needs to bear the wheel load, the lower part needs to maintain the cross-sectional shape rigidity, the middle part supports the upper and lower parts, reduces the force on the upper part, and the horizontal direction is converted from the full-section bending mode to The tension-compression mode of the truss member has high material performance, greatly reduces the wei...

AI Technical Summary

Problems solved by technology

Although the solid-web partition has high rigidity, due to the large area, the force performance is the lowest, the material utilization rate is low, and it is difficult to manufacture and assemble in the factory, and the welding quality is difficult to control; the frame-type partition is based on the solid-web partition. Hollowing, the hollowed out part is supported by struts, which is greatly improved compared with the solid belly type, but still retains a large area of ​​solid section, the material utilization rate is still not at its best, and the struts of the hollowed out part are consistent with the upper The transverse rib and the lower transverse rib are connected by welds. Under the action of wheel load, the transverse rib will have a large out-of-plane deformation, which will cause cracks at the connection between the strut and the gusset plate, which will affect the durability.

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