Experimental test on bridge jointed twin-towered buildings to stochastic wind loads

This paper presents results of a study on wind loads and wind induced dynam ic response of bridge jointed twin-towered buildings. Utilizing the high-fr equency force balance technique, the drag and moment coefficients measured in wind tunnel tests, and the maximum acceleration rms values on the top fl oor of towers, are analyzed to examine the influence of building's plan sha pes and of intervals between towers. The alongwind, acrosswind and torsiona l modal force spectra are investigated for generic bridge jointed twin-towe red building models which cover twin squares, twin rhombuses, twin triangle s, twin triangles with sharp corners cut off, twin rectangles and individua l rectangle with the same outline aspect ratio as the twin rectangles. The analysis of the statistical correlation among three components of the aerod ynamic force corroborated that the correlation between acrosswind and torsi onal forces is significant for bridge jointed twin-towered buildings.