Pre-tensioning crossed steel tie rod supporting and reinforcing reinforced concrete frame structure

The invention relates to a pre-tensioning crossed steel tie rod supporting and reinforcing reinforced concrete frame structure. In a reinforced frame structure plane, two crossed steel tie rods (5) are symmetrically arranged along the diagonal line of a frame unit formed by two adjacent frame columns (1) and upper and lower frame beams (2), one end of each steel tie rod (5) is anchored at the top of one frame column (1), the other end of each steel tie rod (5) is anchored at the top of the other frame column (1), and a pre-tensioning lateral steel support between the two frame columns (1) is formed by applying pre-stress to the two steel pull rods (5). The influence on an original building is small, the dead weight increase of the structure is small, the use area of the building is basically not reduced due to reinforcement, the noise of a construction site is low, dust raising is little, and construction is green and environmentally friendly; and the interlayer lateral stiffness, the anti-seismic bearing cap