Research On RC Structure Damage Identification Method Based On Static And Dynamic Parameters

Since the beginning of the new century,my country has emerged in the Kunming South Railway Station,Guangzhou New TV Tower,and the Hong Kong Qingma Bridge.In these projects,reinforced concrete,the structure of RC is more than 90%.Due to environmental factors,aging,animal load,dense population load,natural disasters,etc.,inevitable caused damage accumulation and resistance to resistance,and occasionally cause sudden destruction of structures.The damage recognition method of the RC structure can be determined in time to determine the specific position of structural damage,evaluate the degree of structural damage,thereby providing a reliable basis for structural maintenance or reinforcement.This is an important theoretical and realistic value for ensuring structural security services,reducing economic losses,protecting people’s lives and property safety.This paper constructs damage recognition indicators based on static power parameters based on the static power parameter damage recognition theory.Based on the sensitivity of its damage recognition,the damage recognition index is corrected and the damage recognition method based on static power parameters is proposed.The damage recognition method is verified by the pre-injury RC beam test,and the static power parameters are combined,a step-by-step damage recognition method suitable for use in the RC frame structure is proposed.The main conclusions are as follows:(1)According to the bending theory of the beam,the difference between the static data difference can reflect the damage of the structure.With this static characteristic,structural damage is used to establish a calculation formula for calculating the degree of static data difference before and after structural injury,and the degree of damage to the structure is calculated using the static parameter change.At the same time,based on the characteristics of the self-vibration frequency and modal vibration type of structural injury information based on vibration force,the degree of damage is determined according to the change of power parameters,on the basis of these,based on the basis,based on the static power Parameter damage recognition indicator.The simulation is performed by damage to the RC beam structure numerical model,and the damage index based on the static power parameters is corrected,and the corrected structural damage recognition method is proposed.(2)To verify the damage recognition method constructed in this paper,the static power test of 3 unscrupulous beams and 10 predated injuries is carried out.Through the test results,it can be derived that the damage indicators constructed herein can generate peaks at the loss position,and their peak is positively correlated with the degree of damage.The damage recognition method can not only accurately identify the position of the damage,but also the identification result that is substantially consistent with the degree of actual damage.This proves the accuracy of the damage recognition method as mentioned herein.(3)The numerical simulation is used to damage the RC frame model.The simulation results can be obtained.The damage recognition method based on the static parameters cannot directly determine whether the frame structure is damaged,and the damage recognition method based on power parameters is partially Damage is not sensitive.Therefore,a step-by-step damage recognition method suitable for use in the frame structure is proposed.Through the ribral RC frame structure test,the step-by-step damage recognition method can be positioned not only to rapidly position the frame damage floor,but also accurately identify the specific position of the frame damage.