Flexural behavior analysis on RC simply supported girder strengthened by adding diagonal brace. Issue 1 (June 2021)

• Record Type: Journal Article
• Authors: Mao, Dejun; Du, Yanbin; Zhang, Zongxing; Chen, Xu; Yu, Wenzheng
• Is Part Of: IOP conference series. Volume 787:Issue 1(2021)
• Publication Date: 2021-06
• Subjects: Earth sciences -- Periodicals; Environmental sciences -- Congresses; Environmental sciences -- Periodicals; 550.5
• DOI: 10.1088/1755-1315/787/1/012099
• Languages: English
• ISSNs: 1755-1307

Abstract

Abstract: Adding the diagonal bracing to strengthen RC simply supported beam bridge has certain engineering application space. In order to study the flexural performance of the strengthened members, the finite element model was established by Midas/Civil to calculate and analyze the load effect of 20m span RC simply-supported T beam under 12 flexural strengthening conditions. The results showed that the connection form of diagonal brace has little influence on the deformation behavior of the strengthened beam. After reinforcement, the positive moment and deflection of mid-span of the main beam can be reduced by more than 50%. At the same time, the main beam appears negative moment, horizontal reaction force, and vertical negative reaction force may occur. The reasonable arrangement of the brace position can ensure that the main beam does not have vertical negative reaction force, and the main beam negative moment and horizontal reaction force, the horizontal and vertical reaction force of the diagonal brace are controlled to obtain ideal load effect results.