STUDY ON SPATIAL ANALYSIS & EVALUATION MODEL OF SEISMIC-PREVENTION ABILITY OF URBAN NATURAL GAS PIPELINE NETWORK SYSTEM
Yan Lu · Tianranqi gongye · 2007
The seismic-prevention ability of urban gas pipeline network system directly affects the general earthquake prevention capability of cities.Thus,its seismic performance appraisal is of great importance in decision-making of urban earthquake prevention.Based on the modeling of spatial analysis network of urban gas pipeline system,the spatial analysis and evaluation model of seismic performance for urban gas pipeline network system was established via the integration of deterministic mathematic approach and GIS technology which has predominance in spatial data process.The pipe stress was taken as evaluation and the combined stress was taken as the measurement standard of seismic destructive degree of gas pipeline network unit.The model realized the analysis and evaluation of spatially seismic performance of urban gas pipeline network system and obtained credible results.It also realized functions of spatial display and spatial orientation inquiry which can help decision-makers to grasp seismic-prevention performance and seismic destructive degree of every gas pipeline network unit prior to earthquake.The establishment of the spatial analysis and evaluation model can provide credible model,technologic and statistic support for urban earthquake prevention project.