空间联系视角的沈阳市多中心城市结构研究

AN EMPIRICAL STUDY ON POLYCENTRIC URBAN SPATIAL STRUCTURE OF SHENYANG IN THE PERSPECTIVE OF SPATIAL ASSOCIATION

以沈阳市为研究案例,借鉴国际著名团队POLYNET的研究经验并加以改良,进行了空间联系视角的多中心城市结构的实证分析。分别从人口密度分布、就业—居住空间联系网络与企业空间组织网络三个维度来识别沈阳市的人口中心、就业中心与产业中心,综合分析这些"中心",得出四点结论:①城市核心区就业与居住中心构成十字交叉的内循环结构;②浑南新区次中心特征颇具雏形;③外围人口中心、就业中心与产业中心错位发展;④沈阳市呈现不均衡的多中心结构特征。

The studies of polycentric urban spatial structure in the traditional perspective generally focus on the static spatial distribution of population density. They used census data to extract, and used mathematical model to simulate these distributions, and then find the evidence of the polycentric characteristics. In con- trast, the spatial association perspective tends to build urban spatial network based on ＂flow＂ and ＂spatial in- teraction＂, and then identify the polycentric characteristics from the nodes of these networks. Taking Shenyang as example, absorbing the experience of the famous research teams POLYNET, an empirical study on polycentric urban spatial structure in the perspective of spatial association was implemented in this paper. The analyzing process was based on three investigating aspects including population density which stood for the traditional perspective, jobs-resides spatial network and enterprise spatial organization network which stood for the spatial association perspective. Population centers, job centers, and industry centers were identi- fied from these three investigating aspects respectively. Finally the conclusions were drawn by comprehensive analysis of these centers. From the comprehensive analysis of these centers, we found that： （1）urban core area presents criss-cross structure composed by a couple of job center and a couple of population center; （2） Hunnan new district shows a certain degree of centrality; （3）there is an obvious spatial mismatch among the population centers, job centers, and industry centers in the urban periphery; （4）Shenyang owns an unbalanced polycentric urban spatial structure. This paper demonstrated that, with the help of the perspective of spatial association, we could find new results and interpret new connotation of polycentric urban spatial structures, which is difficult for using traditional perspective. Thus, it is an effective tool to study the polycentric issues in the urban scale.