Load-bearing capacity degradation of reinforced concrete members in tropical marine environment
In order to investigate the deterioration laws of load-bearing capacity of reinforced concrete structures in tropical marine environment,changes in the compressive strength of concrete,relative dynamic elastic modulus of concrete,reinforcement weight loss,bending capacity of beams and eccentric compression capacity of columns were analyzed by testing the rebound value,ultrasound wave velocity,beam bending resistance and column resistance of the reinforced concrete members exposed in the South China Sea for 3.5 years,and the data was verified with the theoretical formulas.The results show that after the field exposure,the concrete compressive strength and relative dynamic elastic modulus of C50 and C80 members decrease,and the concrete damage in C50 members was more serious than that in C80 members.The reinforcement in the C50 members has been corroded,while the reinforcement in the C80 members is still in the passivation state.The crack resistance and ultimate bending capacity of C50 and C80 beams under bending conditions decrease,and the decrease of C50 beams is more obvious than that of C80 beams.The crack resistance and ultimate bearing capacity of C50 and C80 columns under large eccentric compression decrease slightly.
万方数据
维普
