On Analysis of Spatial Pattern of Urban Influence in Beijing-Tianjin-Hebei Urban Agglomeration
Exploring the characteristics of urban influence was of great significance to play the function of urban economic traction,the positioning of urban planning and the balanced development of regional economy.Based on the macroeconomic data of the economic development of cities in the Beijing-Tianjin Hebei city cluster,this paper calculated and analyzed the spatial pattern characteristics of the economic influence of major cities by using the improved breaking point theory formula.The results indicated that there were significant differences and gradient differentiation among the node cities in urban agglomerations,with a notable"fault"phenomenon in urban hierarchies.The economic quality of node cities was shown to have a"circle layer"form,decreasing gradually from the center to the periphery.The economic traction axis belt was supported by the central city and displayed a crisscross distributed pattern.The intensity of urban economic influence diminished with distance,showing a decreasing trend from the center to the periphery.The influence area formed a multi-center network structure,led by the leading cities of Beijing and Tianjin,supported by the sub-central cities of Shijiazhuang and Tangshan,with close connections and complementary in functions among each city.Relevant policy suggestions were put forward to provide reference for promoting the high-quality development of regional cities and effectively exerting their economic influence.