基于“O-D 成本矩阵”与sDNA 模型的贵阳市中心城区街道网络可达性研究
Accessibility Research of Street Network in Central Urban Area of Guiyang Based on O-D Cost Matrix and sDNA Model
作者信息
刘建浩 贵州理工学院建筑与城市规划学院副教授
胡培滨 贵阳市城乡规划设计研究院规划师
谢汪容 贵阳市城乡规划设计研究院规划师
摘要 城市街道网络的可达性研究是目前城市研究的一大热门方向，对城市发展具有重要的影响，结合当前新数据环境对城市街道网络进行量化整合，可提高研究的科学性，为日后的城市建设与优化贡献微薄之力。本文通过构建“O-D 成本矩阵”与sDNA 空间句法分析模型，运用最小阻抗、出行范围等计算方法，对贵阳市中心城区街道网络的可达性及各指标间的相关性进行计算与分析，得出如下结论：第一，贵阳市中心城区到达各区域所需克服的阻抗呈现中心低、外围高的圈层扩大态势；第二，随着计算半径的增加，城区内高可达性的区域由多点、小范围散点分布的状态，逐渐转变为少量、大范围聚集的分布态势；第三，贵阳市老城区、观山与白云组团具备良好的聚集性、吸引力与通行潜力，但在全局视角下不易到达，而花溪、经济开发区等组团虽易于到达，但缺乏吸引力与聚集力。
关键词 可达性；街道网络；O-D 成本矩阵；sDNA 模型；贵阳市中心城区
Abstract Accessibility research of urban street network is a popular direction in urban research field, and it also influenced importantly on urban development. Combining with the current new data environment, the quantified and integrated city street network can improve the scientific of the research and will make contributions to urban construction and optimization. By constructing the O-D cost matrix and sDNA space syntax model, this paper calculates and analyzes the accessibility of street network and the correlation between various indicators in the central urban area of Guiyang by using analysis methods of minimum impedance and extents of aggression. Firstly, the impedance needed to againist from central Guiyang to the other areas are low in the center and high in the periphery. Secondly, with the increase of calculation radius, the distribution of high accessibility area in urban gradually changes from a distribution of multi-pointed and small range scattered to an aggregation of a small amount with large-scale. Thirdly, the old city cluster, Guanshan cluster and Baiyun cluster in Guiyang are well in aggregation, attraction and traffic potential, but holistically hard to reach, while Huaxi cluster and Jingkai cluster are easy to reach, but lack attraction and aggregation.
Keywords accessibility; street network; O-D cost matrix; sDNA model; central city of Guiyang
来源：《城乡规划》2022年第3期
