Parabolic plane truss type plate girder structure for suspension type boiler of power plant

Abstract

The invention provides a parabolic plane truss type plate girder structure for a suspension type boiler of a power plant. A parabolic plane truss type plate girder is divided into an arching-up type structure and a sinking type structure, and comprises upper chord members, lower chord members, vertical web members, inclined web members and the like. When the arching-up type structure is adopted, the vertical web members are vertical to the lower chord members; when the sinking type structure is adopted, the vertical web members are vertical to the upper chord members. The distance between thevertical web members is determined according to positions of secondary beams. The length of the vertical web members is reasonably selected according to a section bending moment of a node. The upper chord members and the lower chord members have box-shaped sections and the vertical web members and the inclined web members have I-shaped sections. All truss rod pieces are connected through welding or bolts. The parabolic plane truss type plate girders are connected through the secondary beams. The parabolic plane truss type plate girder has the advantages of simple structure, light weight, convenience for processing and purchasing materials, capable of being welded and assembled on the scene, convenience for transportation and the like.

Description

technical field [0001] The invention belongs to the field of boiler steel structure design, in particular to a parabolic plane truss-type large plate beam structure used for a suspended boiler in a power plant. Background technique [0002] Existing power plant boilers have a large load-bearing tonnage of the solid-web large-slab girder, and the structural self-weight is also relatively large. Under the action of section bending moment, the axial bending stress of the mid-span flange is the largest, and the stress of the flanges at both ends is relatively small. When a uniform section is used, the steel consumption is high and the material utilization rate is low. Similarly, under the section shear force, the in-plane shear stress of the end web is large, and the shear stress of the web at both ends is small. When the uniform web section is adopted, the stress of the middle web is relatively small, and the material utilization rate is low. [0003] China Electric Power En...

AI Technical Summary

Problems solved by technology

Like the solid-web large plate girder, this kind of parallel chord truss structure also has the problems of low material utilization rate and heavy design quality of the overall structure.

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