OPTIMIZATION OF WIND VIBRATION RESPONSES OF BUILDING STRUCTURES PLANTED ARBORS ON ROOFS

There is extremely complex interaction between arbors planted on roofs of structures and the structures under wind loads. Base on the roof project of New Baiyun International Airport Traffic Center in Guangzhou, the dynamic characteristics of arbors were tested, a tree-structure interaction model was constructed, the dynamic responses of the structure under the excitation of wind action and arbor vibration were explored, and the parameter analysis of the model was conducted based on model optimization on the interface of arbor bases and plant pools. The analysis results showed that the diameters of arbors were sensitive to the wind-induced acceleration response on the top floor of the structure. Larger diameter arbors would cause the acceleration of structures greater than the limit for the human comfort degrees under the wind load. The problem of comfort degrees out of limits caused by the tree growth should be taken into account in the design of the roof engineering. Considering the SSI effect, the soil in plant pools could be taken as a spring damping system to simplify the complex interaction between trees and soil in the tree pool.The optimization method was verified to be reasonable and feasible.