Study On Condition Assessment Of Corroded Reinforced Concrete Component Considering Degradation Of Carrying Capacity

Steel corrosion is the primary factor leading to the destruction of reinforced concrete structures.In order to more effectively and objectively evaluate the impact of reinforcement corrosion in reinforced concrete structure safety assessment,in this thesis,the bearing capacity of steel corrosion caused by the degradation of concrete structures as the primary factor in the safety assessment of existing reinforced concrete,and try to apply the method to the actual project,to verify its rationality and effectiveness.Firstly,this thesis analyzes the impact of reinforcement corrosion on the bearing capacity of reinforced concrete members,and summarizes the current state of reinforced concrete structures evaluation,and points out the shortcomings of traditional methods that exist in.Secondly,this thesis analyzes the applicability of the calculation method of bending capacity of the existing concrete members.After the results were compared with experimental results found,the results of the calculation method has a relatively small test results,and when severe corrosion,this phenomenon that component capacity decreased more significantly is not reflected in the existing calculation method.Therefore,this thesis uses experimental data of our group and the publication in the test results,to fix the existing formula of capacity.After verification,the correction formula has better applicability.It can provide the basis for state assessment of reinforced concrete members.Finally,after taking into account the factors that lead to corrosion of steel component capacity degradation,to improve the traditional evaluation methods.In this thesis,the bearing capacity of corrosion of reinforced concrete members as the main factors,and combined with the support and structure,displacement and deformation,and fracture,to evaluate reinforced concrete members.The method is applied to the project examples and compared with the traditional evaluation methods.Assessment results are close with the traditional method,but relatively more objective.And the method gives the remaining bearing capacity of corroded member.It may influence the selection of the subsequent strengthening scheme,and the residual life prediction.