Title: Bending Test of HDC Strengthened Damaged Beam under Cyclic Loading

Author(s): Jialiang Kou , Shun Yang, DongDong Zheng

Publication: Materials Journal

Volume:

Issue:

Appears on pages(s):

Keywords: cyclic loading; high ductile concrete (HDC); flexural capacity; flexural performance; reduction factor; strengthened

DOI: 10.14359/51740775

Date: 5/1/2024

Abstract:
To study the damage characteristics and failure mechanism of reinforced concrete damaged beams under cyclic load, the load-strain curve and stiffness degradation curve of reinforced concrete (RC) beams strengthened by adding stirrup, longitudinal reinforcement, and high ductile concrete (HDC) under repeated load were compared, as well as the flexural ability before and after strengthened. The results show that: compared with the original beam, the strengthened method with longitudinal strengthened at the bottom of the beam has the most obvious improvement in the flexural capacity of the beam. When the longitudinal strengthened is added, the flexural capacity can be increased by 86.25%. According to the actual failure mode of the reinforced beam, the stress reduction coefficient and height reduction coefficient are theoretically derived, and the bending capacity of the reinforced beam under each strengthened method is calculated. The theoretical value is in good agreement with the test value.