Research And Application Of Earthquake Disaster Prediction Method For Urban Group Frame Structure

China is one of the countries with the most serious earthquake disaster losses worldwide.In recent years,the speed of urbanization in China has been accelerating,and the total economic volume has increased day by day.As a result,the losses caused by destructive earthquakes are even more unbearable.In view of this,improving the city’s comprehensive capacity for earthquake and disaster mitigation and reducing the losses caused by earthquake disasters is one of the major engineering problems that the Chinese government needs to solve at the current stage.Only through appropriate earthquake damage prediction methods can the city’s seismic capacity be accurately evaluated,and effective and targeted preventive measures and emergency measures can be obtained to comprehensively improve the city’s comprehensive capacity for earthquake and disaster prevention.The seismic damage prediction methods of frame structures can be roughly divided into empirical statistical methods,theoretical analysis methods,semiempirical and semi-theoretical methods,and fuzzy analogy methods.Considering the many factors such as workload and accuracy,semi-theoretical and semi-empirical methods are generally used in the preparation of earthquake disaster prevention planning in cities.The main research contents of this paper are as follows:1.Based on the semi-theoretical and semi-empirical methods,this paper combines the data of the building drawings of the sample city to study the parameters of the inter-layer yield shear force calculated in the method,and proposes a relatively simple calculation of the structural layer.The formula of the existing shear bearing capacity parameter can be used to obtain the vulnerability matrix of the urban group frame structure,which effectively reduces the workload of data processing in the preparation of earthquake disaster prevention planning.2.By using SAP2000 software,finite element numerical modeling analysis is carried out for a building instance with theoretical method,and comparison is made with the seismic damage prediction results calculated by the semi-theoretical and semi-empirical method using the new formula,so as to verify the feasibility of the new formula in seismic damage prediction method.3.In this paper,the seismic damage prediction of a building in a northern city is carried out by using the research results,and the vulnerability matrix of the frame structure is obtained.At the same time,it also summarizes and sorts out the current situation of the city’s buildings.In addition,the paper also makes arrangement and summary for the compilation of urban seismic disaster prevention planning.