Bridge crane bridge strengthening scheme

 As steel production needs,  bridge gantry crane  frequent long at full load lifting of the state of the bridge crane will appear under torsion, lateral bending and other serious problems, greatly shorten the life of the bridge, but not conducive to the safe operation of the crane . Therefore, to be reinforced for overhead crane bridge, in order to improve the carrying capacity of the bridge and the safety factor, Here I share with bridge strengthening scheme:
Need for the reinforcement of the  overhead bridge crane  girder bridge box-shaped track, a span of 16.5m. Improve the overall carrying capacity of the bridge primarily for the main beam, main beam and side beams connecting welds, end beam three parts to reinforce dangerous section of the program is as follows.
    1.1 improve the carrying capacity of the main beam reinforcement scheme
Increasing the cross sectional area of ​​the main beam can increase the moment of inertia, thereby increasing the strength and rigidity of the main beam, the main beam is to improve the carrying capacity of a reliable and effective way. Increasing the cross sectional area of ​​the main beam of the most common methods are the following three kinds, each of the following features:
   (A) small box beam welding reinforcement increases large cross-sections to increase the quality of large structural components, structural parts production workload, difficult construction, welding capacity, suitable for large tonnage, larger span Crane beam reinforcement.
   (2) increased reinforcement welded channel cross-sectional area smaller than the welded box girder reinforcement method is small, welding capacity, but the increase of the structural parts quality to light, the structure of the production of a small amount of work, construction difficulty, suitable for representing large tonnage, smaller crane girder span reinforcement.
   (3) the increase in cross-sectional area Prestressed Reinforcement and welding small box girder reinforcement method considerably, welding a small amount of light to increase the quality of structural components, structural parts produced small amount of work, construction difficulty, suitable for small tonnage  overhead gantry crane   main beam reinforcement. Taken together, decided to adopt the main beam under the cover plate is welded on the 16th channel reinforcement, and in the cover plate weld a new cover.
   1.2 improve the main beam and side beams carrying capacity of the connection weld reinforcement program
 Main beam and the end plate connections through the beam web, and the web plate carrying the most shear weld, the weld connecting the bearing capacity of the attachment welds number, length, thickness of the meat is directly related to welding, which increase the connection increase the number of weld seam on the carrying capacity of the most significant effect. Therefore, using a solution to increase the number of attachment welds, which in the original plate and welding the outside of a reinforcement plate.
   1.3 improve the carrying capacity of the end beam reinforcement program
Reinforcement required at each end of the beam bridge crane under two wheels, track smaller, and thus end beam to withstand the bending moment is small, so the upper and lower lid force is small, can not reinforced; side beam web is subjected to a more large shear, while at the wheel support section to withstand the most vigorous, therefore, to take the end of the beam web welded steel shearing reinforcement program.