The Mechanic Analysis and Construction Method on Damaged Beam of External Prestressing Reinforcement

摘要

In order to investigate the feasibility of reinforcement transformation schemes for actual engineering, Combined with the characteristics of the project, the reinforcement transformation designs of the roof beams is carried out, three kinds of reinforcement transformation design schemes are put forward, they are carbon fiber reinforced polymer strengthening, internal prestressing strengthening and external prestressing strengthening. The external prestressing reinforcement scheme is selected after comparing. Numerical simulation analysis of the reinforcement system is done by ANSYS software, and nonlinear finite element model of simply supported beam with crack is built, through analysis deformation, cracks and stress distribution of reinforced beam are obtained. The results show that the using function of beam is improved obviously. The rationality and feasibility of this reinforcement scheme is validated. These can provide references for reinforcement transformation of similar existing buildings.