Preparation method and application of open-spandrel steel section reinforcing bar with a circular hole

The invention relates to a preparation method and application of an open-spandrel steel section reinforcing bar with a circular hole, and belongs to the technical field of structural construction. Addition of a common solid-web steel section reinforcing bar on the joint area of a special-shaped column structure increases the difficulty in construction, and addition of reinforcing bar in the joint area causes inadequate bonding of steel with concrete and reinforcing bar; and aiming at the above problems, the invention provides open-spandrel steel section reinforcing bar with circular hole. Processing of the steel section added to the joint area forms the open-spandrel steel section reinforcing bar with circular hole; and without increase of cost, the open-spandrel steel section reinforcing bar facilitates the construction of the joints, overcomes the relative slip of concrete and steel in the joint area, and does not affect even help the enhancement of the seismic performance of the joints.