建成环境对邻里交往的影响机制及其情境响应OA

Neighborhood interactions are important for public health and social governance.However,as China has undergone rapid urbanization,such interactions have declined.Existing research on how the built environment affects such interactions falls short of capturing the unique features and mechanisms of high-density,diverse,and multi-layered urban contexts.Guangzhou was used as a case study,covering 52 residential neighborhoods and 1,009 household questionnaires.This study systematically explores how the built environment shapes neighborhood interaction outcomes(frequency,diversity,and relational quality),distills its underlying mechanisms,and examines the contextual responses across five types of neighborhoods.Twenty-one built environment indicators were measured at two scales:the neighborhood site and 500 m/1,000 m buffers.These indicators include land use and facilities,street and transport networks,green space,overall neighborhood form,cluster form,and comprehensive neighborhood characteristics.Hierarchical linear models were used to account for the nested data structure,complemented by a qualitative spatial analysis.The results show that more than a dozen indicators exert robust effects,with several diverging from Western"low-density-compact"findings:land use mix and local road density suppress interaction by dispersing daily activities and adding environmental pressure;metro station density scatters pedestrian flows in certain typologies,while primary and secondary road density encourages interaction by providing linear spaces for chance encounters.Newly introduced indicators such as residential structural hierarchy and cluster form show robust effects in most models.Two core mechanisms are identified.The first is an"internal-external competition and synergy mechanism,"comprising three sub-mechanisms:the internal activity retention mechanism,the external opportunity attraction mechanism,and the adjacent place triggering mechanism.When relevant spatial resources and quality are enhanced,the retention effect of a richer spatial hierarchy,sufficient green coverage,and a moderate cluster ratio within the neighborhood competes with the dispersing and attracting effects of a high land-use mix,high local street density,and large parks outside,while the increase in nearby high-density primary and secondary roads and small-to-medium parks within 500 m cooperates with internal neighborhood elements to promote interaction.The second is the"boundary perception mechanism."Physical boundaries(neighborhood scale,building height,and enclosure form)and socio-territorial boundaries(gated/open status and mixed/non-mixed composition)shape residents' sense of domain,security,and identity,thereby modulating their willingness and behavior toward neighborhood interactions.These mechanisms give rise to four context-specific response patterns,ordered from low to high interaction levels:"vertically stratified,with strong outward pull";"constrained internal space,rich external amenities,and high external dependence";"internally focused,with high sensitivity to external resources";and"internal-external interweaving,with vibrant street life."By elucidating the mechanisms through which the built environment affects neighborhood interactions and their contextual responses,this study further proposes,at the planning optimization level,a shift from compactness advocacy to targeted interventions,such as controlling residential scale(＜5 hm2)and building height(＜11 stories),increasing green coverage and spatial hierarchy,strengthening linear encounter corridors,and proposing precise renewal strategies tailored to different residential typologies to support people-oriented urban renewal.