In building engineering, what are the connection methods of steel bars and what are their characteristics?

There are three main reinforcement connection methods: binding and overlapping, mechanical connection and welding.

Tie-lap connection is a way to transfer the stress of steel bars through the bonding force between steel bars and concrete. Two opposite reinforced bars are respectively anchored in the concrete in the lap joint section to transfer the force to the concrete, so as to realize the stress transfer between the reinforced bars.

The radial thrust of overlapping steel bars caused by the oblique compression of the transverse ribs caused the separation trend of the two steel bars, and longitudinal splitting cracks are easy to appear between the two overlapping steel bars, even destroyed by the separation of the two steel bars, so it is necessary to ensure strong stirrup restraint.

binding

threaded connection, binding is still one of the main means of steel bar connection. Steel binding, steel intersection with wire fastened; For the steel mesh between the plate and the wall, except for the intersection points of the two rows of steel bars in the periphery, the intersection points in the middle part can be staggered and fastened at intervals to ensure that the position of the stressed steel bars does not deviate; The stirrups of beams and columns should be set vertically with the stressed steel bars, and the overlapping places of hooks should be staggered along the direction of the stressed steel bars. The lap length and joint position of tension steel bar and compression steel bar joint meet the requirements of construction and acceptance specifications.