Research On Modeling Of Hysteretic Characteristics Of Seismic Damaged RC Piers

Due to the geographical location of our country in the Pacific Rim and vast territory,earthquakes can often occur in some areas.As a result,there are not many damaged buildings,yet some of them still do not cause much damage.Many structures with damage The bearing capacity is still relatively good and it is necessary to repair it.Therefore,it is of great significance to study the seismic performance of earthquake-damaged reinforced concrete structures in some areas of our country.The difference with the new structure is that the earthquake damage structure has already caused severe tests on its structure and grace due to the previous earthquake.There are a lot of literatures on the earthquake-resistant performance of reinforced concrete pier structure analyzed and studied,the scope of the study is also very large,this paper mainly on the reinforced concrete pier structure,the main analysis of seismic damage to the reinforced concrete pier column stagnation Back to the model to determine.Here are the upcoming work and related goals in this article:(1)Through the analysis of the literature research results,find the information about the seismic hysteretic model of reinforced concrete pier,and then develop the research methods and processes,the paper in the process of the United States Pacific Seismic Engineering Research Center collected 103 reinforced concrete members As an example of experimental analysis,in order to obtain relevant data.(2)A total of 103 reinforced concrete specimens were tested several times and the damage index values of 103 specimens under various damage conditions were calculated by using Park-Ang damage index formula.Choose the way of regression analysis,and gradually calculated and analyzed many coefficients of these components to get the fitting formula.The relevant coefficients are not only the stiffness degradation index,the damage index,but also the degradation coefficient of the energy degradation parameter of the hysteretic strength degradation coefficient.Based on these data,the hysteresis model of the reinforced concrete pier based on the damage degree is established.Because the prediction formula is not accurate enough,This article has made the improvement in the example research process.(3)The Ibarra-Medina-Krawinkler regression model was selected and corrected.Thedamage problems of reinforced concrete structures are mostly caused by the plastic damage factor of concrete.According to the hysteresis model of reinforced concrete piers proposed in this paper,ABAQUS finite element analysis platform is used to analyze the low-cycle cyclic loading simulation and dynamic elasto-plastic time-history analysis of pier structure,respectively,to prove the scientific nature of the model.With regard to the problem of seismic recovery without considering the earthquake,this paper analyzes the comparative calculation model to show the impact of earthquake-damaged reinforced concrete pier structure on earthquake damage.