Chen Zengshun, Kim Bubryur, Lee Dong-Eun
School of Civil Engineering, Chongqing University, Chongqing 400045, China.
Department of Architectural Engineering, Dong-A University, Busan 49315, Korea.
Sensors (Basel). 2021 Jun 11;21(12):4046. doi: 10.3390/s21124046.
This study evaluates the aerodynamic characteristics and lateral displacements of two staggered buildings in a linked-building (LB) system. Particle image velocimetry and pressure measurements are employed, and the lateral displacement is evaluated using a 3-dimensional analytical model. When the gap distance between two non-linked buildings is small, the wind flows in a narrow jet, and a strong suction is generated on the inner surfaces of the two buildings, leading to a large cross-wind-induced response. However, the cross-wind-induced response is significantly reduced when a link is installed, because the suction forces generated from the buildings are in opposite directions and have a negative aerodynamic correlation. Conversely, with a large gap distance, the buildings at the front obstruct the wind blowing toward the rear buildings. Therefore, while the pressure distribution, wind-force coefficients, and wind-induced responses of the front and rear buildings show similar trends, the magnitude of impact on the front building is larger than that on the rear building. Installing a link is demonstrated to reduce the wind-induced response of the buildings in an LB system. However, the reduction in the along-wind-induced response is less than that in the cross-wind-induced response when the gap distance is small.
本研究评估了连体建筑（LB）系统中两座交错建筑的空气动力学特性和横向位移。采用了粒子图像测速技术和压力测量方法，并使用三维分析模型评估横向位移。当两座非连体建筑之间的间隙距离较小时，风以狭窄射流形式流动，两座建筑内表面会产生强烈吸力，导致较大的横向风致响应。然而，安装连接体后横向风致响应会显著降低，因为建筑物产生的吸力方向相反且具有负空气动力学相关性。相反，当间隙距离较大时，前面的建筑物会阻挡吹向后部建筑物的风。因此，虽然前后建筑物的压力分布、风力系数和风致响应呈现相似趋势，但对前面建筑物的影响程度大于对后面建筑物的影响程度。结果表明，安装连接体可降低LB系统中建筑物的风致响应。然而，当间隙距离较小时，顺风向风致响应的降低幅度小于横向风致响应的降低幅度。
