Abstract: The FRP composite material chimney has the advantages of light weight and good corrosion resistance. It is a new type of composite chimney structure, which is combined with the steel outer cylinder. In the latest "chimney design code", it is not involved. And there is no design standard for this kind of structure. Because of the difference of stiffness between the steel outer cylinder and the inner cylinder, the chimney structure is difficult to design and calculate. And the wind load is one of the main loads of tall and slender structure. Its response is the main basis for the design of chimney. In this paper, the fine finite element model of the steel-FRP chimney structure is established. The response of this new type of chimney under the along-wind impulsive wind is analyzed by using modal superposition method. The random vibration response of the structure is obtained. For the wind resistant design of the new type of composite material chimney structure, an effective method is proposed.

Key words: FRP materials chimney, wind-induced vibration, modal superposition method, FEM