Earthquake Hazard Assessment and Analysis of Influencing Factors Based on Census Data
The earthquake hazard assessment of buildings is a task covered by the first national comprehensive risk census of natural disasters.As the work of earthquake hazard assessment progress,the earthquake hazard assessment of disaster-bearing buildings in many provinces and cities has been completed one after another.To utilize the survey results to assist relevant departments in making targeted decisions,it is necessary to analyze the influencing factors of disaster-bearing bodies and their importance.Based on the build-ing survey data of the first national comprehensive risk census of natural disasters,this paper first statistically analyzes the number,seis-mic fortification level,deformation and damage status,and construction age of five types of disaster-bearing buildings in different seis-mic intensity areas and peak acceleration adjustment areas in a provincial administrative region.Secondly,it uses the technical evalu-ation specification of hazard level to calculate the hazard index of individual disaster-bearing buildings.Then,it gives the earthquake disaster hazard level of different types of regions.Finally,it compares and summarizes the influencing factors of the hazard assessment results based on the adjustment of seismic intensity and peak acceleration.The results show that with the increase of intensity and the increase of peak acceleration of fortification,the hazard level of buildings and regions will increase overall.In terms of category distri-bution,the overall hazard level of earthquake disasters in rural buildings is relatively high,among which rural non-residential buildings are the main category of disaster-bearing buildings with major earthquake disaster hazards.In terms of influencing factors,the impact of deformation and damage on key hazard individuals decreases with the increase of seismic fortification intensity,while the impact of de-formation and damage and construction age on general hazard individuals decreases as the seismic fortification intensity increases.
万方数据
维普
