Abstract
This study reveals turbulent field around high-rise building in building cluster, and examines the effect of the turbulent field on fluctuation for sectional wind forces. As a result, peak of frequency appears around fB/Uref = 0.1 corresponding to period of vortex shedding at 300m height which is not affected by windward buildings. On the other hand, at 200m height, peak of frequency exists at a frequency larger than fB/Uref = 0.1 and fluctuation of sectional wind force with low frequency exists. The result of reduced order model constructed from the mode of proper orthogonal decomposition(POD) implies that separation shear layer from buildings with smaller width makes the peak frequency larger and the fluctuation with low frequency is induced by turbulent field around several buildings.
