jismart2023030: The Impact of Different Densities and Layouts of Coastline High-Rise Building Groups on Pedestrian-Level Wind Environments

Abstract

The sea-land breeze is an important mesoscale weather system in coastal areas. For coastal cities, the impact of the sea-land breeze on the pedestrian-level wind environment is significant, and creating a favorable pedestrian-level wind environment in coastal cities also has high practical meanings. However, due to China's rapid development in recent decades, coastal cities like Qingdao have constructed high-density urban agglomerations along the coastline. Existing research does not fully understand of how high-rise building groups affect the pedestrian-level wind environment. This study applied butterfly plugin on the grasshopper platform within Rhino to simulate how various building densities affects the pedestrian-level wind environment. This study constructed a serious of models of coastal building groups, which mimics the urban density along the coastline of Qingdao city. The results indicate two important findings: 1) The height of the building groups has a great impact on the wind speed at the pedestrian level; 2) When building density was changed to 20-45%, the area of low wind speed areas between buildings was increased and the average wind speed decreased, as the density of coastal high-rise buildings increased. This range of density was not conducive to creating a comfortable pedestrian wind environment.