Simulation of Wind Pressure Distribution and Equivalent Static Wind Loads of a Complex Longspan Dome Grid Structure Under Undulating Terrains

Abstract

Abstract:

Abstract： The wind pressure distribution, wind-load shape coefficients and equivalent static wind loads of a complex longspan dome-grid structure under undulating terrains were numerically simulated using FLUENT. The results show that the distribution of wind load shape coefficients are quite different with the change of the wind direction. The time-history series of wind velocity was simulated based on the harmonic superposition method and then turned into the timehistory series of wind pressure. The FEM model of the structural system was constituted by using ANSYS and the structural wind-induced responses and wind load shape coefficients were obtained based on the timehistory series of wind-pressure. The wind-induced dynamic amplification factor was defined, so the structural resonant responses could be considered. Then, the wind-induced dynamic amplification factor was combined with the distribution of instantaneous wind pressure at the given time and the equivalent static wind loads of the structural system were established. The numerical analysis reveals the distribution of equivalent static wind loads based on the minimum vertical reaction forces of structural system.

Key words: longspan dome-grid structure, wind-load shape coefficient, windinduced dynamic amplification factor, equivalent static wind load

CLC Number:

QIAO Shuaibin1,LU Dan2,MA Ning1,ZHOU Dai1,WANG Zitong1. Simulation of Wind Pressure Distribution and Equivalent Static Wind Loads of a Complex Longspan Dome Grid Structure Under Undulating Terrains[J]. Journal of Shanghai Jiaotong University, 2014, 48(11): 1562-1567.

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