Analysis of wind-induced vibration coefficient for long-span aluminum dome

The spatial lattice dome is well-known for its lightness and long-span.Due to the sensibility to wind load,the wind is always the major or even the critical load applied to such structures.As a new type of metal material,the elastic modulus and density of aluminum are only about 1/3of the steel's.The corresponding dynamic response of the aluminum dome under wind load is more significant.In this paper,the time history of wind velocity of the structural nodes fitting Davenport and Panofsky power spectrum are obtained using weighted amplitude wave superposition method.Then time history analysis of the aluminum dome is completed by using the time history of wind pressure on the structure which is transformed from the time history of wind velocity gained as well as the wind pressure coefficient gained according to the load code.The wind-induced vibration of the structure is calculated.And the wind-induced vibration coefficient of nodal displacement,member's stress and support's force are used to evaluate the vibration characteristics of the structures.Besides,the comparisons between the wind-induced vibration coefficients of same span steel dome are discussed as well.