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A platform for research: civil engineering, architecture and urbanism
Torsional Excitation and Interference Effects of Tall Buildings with Structural Eccentricity
This report describes an experimental investigation in wind tunnel of torsional excitation of a tall square building with structural eccentricity and torsional interference effects on the eccentric building response from neighboring buildings of different sizes. The eccentric building model was an aeroelastic model of pure torsional motion and the interfering building models were rigid. Tests were carried out in 1:400 scale wind models of natural wind flow over open country and city center terrains developed in the wind tunnel. The probability distribution of peak response, aerodynamic damping and torsional excitation spectrum were examined to determine torsional excitation and response characteristics. It was found that the tall square building with a 10% geometric eccentricity ratio was more susceptible to torsional motion and vibration, compared with one without eccentricity. There was a significant increase of maximum mean responses, and an unstable torsional vibration due to vortex shedding was also observed in which large amplitude twist angular displacement occurred.
Torsional Excitation and Interference Effects of Tall Buildings with Structural Eccentricity
This report describes an experimental investigation in wind tunnel of torsional excitation of a tall square building with structural eccentricity and torsional interference effects on the eccentric building response from neighboring buildings of different sizes. The eccentric building model was an aeroelastic model of pure torsional motion and the interfering building models were rigid. Tests were carried out in 1:400 scale wind models of natural wind flow over open country and city center terrains developed in the wind tunnel. The probability distribution of peak response, aerodynamic damping and torsional excitation spectrum were examined to determine torsional excitation and response characteristics. It was found that the tall square building with a 10% geometric eccentricity ratio was more susceptible to torsional motion and vibration, compared with one without eccentricity. There was a significant increase of maximum mean responses, and an unstable torsional vibration due to vortex shedding was also observed in which large amplitude twist angular displacement occurred.
Torsional Excitation and Interference Effects of Tall Buildings with Structural Eccentricity
W. J. Zhang (author) / K. C. S. Kwok (author) / Y. L. Xu (author)
1992
71 pages
Report
No indication
English
Structural Analyses , Aerodynamics , Wind loads , Dynamic response , Buildings , Structural vibration , Aerodynamic interference , Structural analysis , Wind tunnel tests , Turbulent flow , Buffeting , Eccentricity , Vortex shedding , Model tests , Displacement , Resonant frequencies , Foreign technology
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