| The circular latticed-shell structure is one of new-type structural systems for super-tall buildings. In order to analyze the structural system, both the modelling and analytical methods are investigated in the thesis. The principal works are as follows:1. Modelling: A circular latticed-shell structure is simplified as a thin-walled circular tube of variable cross sections supported on a semi-infinite elastic body, based on the principle and method of equivalent stiffness and mass. Some proper nodal lines are utilized to discretize the tube so as to describe the displacement field or dynamic behaviors of the structural system by means of the one-variable functions defined on the nodal lines. The governing equations and corresponding boundary conditions of a desired problem are then developed by using the principle of minimum potential energy or Hamiltonian principle. The equations are ordinary differential equations which can be solved by means of computer software—ODE Solver.2.Analysis: The interactions between the soil and foundation and superstructures as well as free vibration of a circular latticed-shell system of a super tall building are performed by numerical examples, respectively. Some conclusions are obtained, such as a circular latticed-shell structure has great wholeness and great stability, and it has very little sidesway under horizontal loads. The natural periods in the directions of x, y is so close with that in the direction of z, therefore if the resonance happened under the geological process, the vibration will happened in several directions, and this will expand structural damage.
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