Preliminary Study On Simplified Method Of Earthquake Damage Prediction Of High-rise Reinforced Concrete Shear Wall Structures

The damage caused by the earthquake to the human society is not only reflected in the damage and collapse of the buildings due to the release of their huge energy,but also the secondary disasters such as fire,debris flow and landslides caused by the earthquake.Due to the rapid development of economy and the acceleration of urbanization process,in order to solve the problem of large population and lack of land resources,the number of high rise shear wall structure in China is increasing.The seismic activity of China has the characteristics of wide distribution,high intensity and shallow seismic source.Once the earthquake occurs in the city,there will be a small earthquake causing great disaster and large earthquake causing catastrophe,so it is very necessary to study the seismic performance of the shear wall structure.In addition,in the field of earthquake damage prediction research,on the one hand,the traditional method of earthquake damage prediction is relatively complex and complicated,and the cycle of earthquake damage prediction is long.On the other hand,the information about the earthquake damage prediction of the high-rise shear wall structure is very scarce.Therefore,it is urgent to simplify the method of earthquake damage prediction for high-rise shear wall structures.The main contents of this paper are as follows:Firstly,in this paper,the present situation at home and abroad of structural seismic study is summarized.Considering the scarcity of seismic damage data of shear wall structure and the lack of seismic vulnerability research in current shear wall structure,a simplified method for earthquake damage prediction of high rise reinforced concrete shear wall structure based on incremental dynamic analysis is proposed.Secondly,according to the requirements of the current national standards,12 high-rise reinforced concrete shear wall structures with different seismic fortification intensity and different layers are designed according to the principle of control variables.The corresponding elastoplastic analysis model is established by using the Etabs2016 structure finite element analysis software.Finally,the seismic performance of the 12 structures is evaluated by the IDA analysis method,and the seismic vulnerability curves of each structure are given,and the effects of the fortification intensity and the number of layers on the seismic performance of the structures are summarized.Based on the results of IDA analysis,the function relation between the peak acceleration of ground motion,the intensity of fortification,the number of layers and the maximum interlayer displacement angle of the structure is constructed by multiple nonlinear regression analysis.The simplified method for predicting the earthquake damage of the high-rise reinforced concrete shear wall structure is given,and the reliability of the method is verified by examples.It can provide a powerful scientific basis for the study of earthquake damage and loss in engineering structures,and also provide valuable research information for emergency rescue in the affected areas.