The Research And Development Of Seismic Hazard Analysis System For Engineering Site Based On GIS

Seismic hazard analysis for engineering site research means to scientifically evaluate on the earthquake influence degree for study area when suffered in the fixture according to the statistics of the site conditions and the parameters of earthquake history. The study and analysis of seismic and geological environmental conditions of the site are based on epicenter of earthquake, site conditions, and to study the wave propagation, attenuation and seismic liquefaction effects after earthquake form the engineering point of view. The purpose of the paper is to provide basis knowledge for seismic design of engineering structures.This study follows through the study of Yunnan Province Natural Science Foundation project named "GIS-based seismic evaluation and disaster prediction of the road network in Kunming".The present study is focused on seismic hazard analysis of engineering site. The spatial and attribute data of large amount of boring logs are systematic management and analysis engineering site by means of GIS-the powerful spatial data storage and management,the results are visualized by GIS. Finally a seismic hazard analysis system has been developed with the aid of components of Arc Engine which is provided by ArcGIS series software.This paper has developed several modules, including the spatial distribution of seismic liquefaction, site response spectrum characteristic periods and earthquake-affected field generated,etc based on the previous study on seismic hazard analysis system for engineering site. Studies in this paper include the following contents:1. The basic theories and methods of the engineering site seismic hazard analysis;2. Ground motion attenuation model and engineering site seismic liquefaction model;3. The methods of GIS used in engineering site seismic hazard analysis;4. Design and build of engineering site seismic hazard analysis database; 5. Development of the calculate model embedded into GIS systems which has friendly interactive interface,and more intuitive operability;Generally Speaking, GIS-Based seismic hazard analysis system for engineering site can provide reasonable methods for engineering site data storage and management, provide convenient and efficient means for the display of result visualization, provide site information for the city development and provide means for seismic design of engineering structures.