The Analysis Of Wind Vibration Coefficient Of Long-span Dome Structures With Different Thickness

摘要

In this study, wind vibration coefficient and the most unfavorable part of wind-induced vibration of a long-span thin shell dome structure are investigated, by using the finite element method to analysis three dimensional wind vibration in time domain. And wind load is simulated by harmonic superposition method combined with self-programmed MATLAB, based upon which fluctuating wind speed curve and fluctuating wind pressure curve are obtained. The influences of dome's thickness are considered in the analyses of the change of vibration coefficient. The results show that, Long-span dome structure's wind coefficient increase with the decrease of thickness and its central part is the most unfavorable part of wind-induced vibration. Moreover, harmonic superposition method is an effective way to simulate fluctuating wind in time-history analysis. Finally, it provides a reference and analytic procedure for long-span dome structures in wind-resistant design.