基于可达性的沈阳经济区中心地空间结构演变

The Evolution of the Structure of Central Places in Shenyang Economic Zone Based on Accessibility

从影响城市与区域发展的交通因素入手,在其变化过程中探讨沈阳经济区中心地结构的演变。以可达性作为度量沈阳经济区交通因素优劣性的指标,通过对1992,2000和2011年3个时段的交通数据计算,得出沈阳经济区各中心地可达性,并通过可达性与中心地空间结构的叠加分析得出沈阳经济区各中心地的发展特征与演化趋势。研究表明:沈阳经济区中心地空间结构中心极化明显,内部圈层中心地体系完整,发达程度高,主要交通轴线上的中心地数量及规模发展较快。在交通因素主导下,可达性与中心地空间相互作用强烈,并引导中心地视图向点轴与圈层相融合的蛛网模式演变。

Studying the changes in the traffic factor which affect urban and regional development, and investi- gating the evolution of the structure of central places of Shenyang economic zone along with the changes. In the pa- per, accessibility is taken as a means of measuring the advantages and disadvantages of the traffic factor of Sheny- ang economic zone. Specifically, using the traffic data in three time intervals （1992,2000,2011 ）, calculate the ac- cessibility of every central place in Shenyang economic zone, then obtained the developmental characteristics and evolutionary trend by overlay analysis. Studies have shown that the structure of central places of Shenyang economic zone demonstrate agglomerate form, and the system of central place is complete and mature in the internal spheres, furthermore the central places which distribute along the transport axis develop better in number and size. Under the auspices of the transport factor, accessibility space and central place space interact intensely, and it is a obvious trend that the view of central place is a web mode which is merged by point-axis mode and circle layout mode.