Analytical model of flexural behavior of corroded reinforced concrete beams

作者：Xing Guohua^*; Niu Ditao

来源：Journal of Central South University(Science and Technology), 2014, 45(1): 193-201.

• Beam
• Corroded reinforced concrete beams
• Effective stiffness
• Equivalent stiffness
• Flexure behaviour
• Reinforced concrete beams
• Simply supported beams
• Theoretical expression

By selecting reinforced concrete beams of lower corrosion rates as research object, a calculation formula of flexural baring capacity of corroded reinforced concrete beams was put forward based on the plane section assumption. Furthermore, a theoretical expression of equivalent stiffness of corroded reinforced concrete beam was suggested by using transformed section approach. The weakening of the bond between concrete and reinforcement was considered in this method. In addition, a theoretical formula of mid-span deflection of corroded reinforced concrete simply supported beams subjected to a four-point bending was proposed. The analytical? model was verified using 39 corroded reinforced concrete beams. Good agreement between test results and prediction results for flexural baring capacity is achieved with an average ratio of test results to predicted results being 1.100 and the variance being 0.041. The trends of the test load-mid span deflection curves and the predicted curves are much the same. Thus, the suggested model can be served as a reference for full-range analysis of corroded reinforced concrete beams.

• 出版日期2014