Dynamical Analysis Of Partial Double Layer Reticulated Shell

Reticulated shell has beautiful structure shape and excellent mechanics performance. It is one kind of space structures used extensively in the recent years. This paper analyses the seismic performance on the optimum partial double layer reticulated shell under the present situation.Firstly, the paper calculates the natural vibration on the optimum partial double layer reticulated shell by two different finite element methods, analyses the dynamic feature and gains the elementary parameters.Secondly, the paper studies the dynamic response under the earthquake excitation, calculates the dynamic response of the optimum partial double layer reticulated shell subjected to unidirectional, bi-directional and three- dimensional earthquake waves respectively. Simultaneously the paper analyses the linear, geometric nonlinear and geometric and material nonlinear dynamic responses in every situation. The node displacements and members stresses are compared and analyzed. The characteristics of elastoplastic seismic responses of the structure are revealed and the basic rules under the seismic excitation are obtained.Associativing the seismic trait, this paper proposes a vibration reduction method by supplementing viscous dampers in the reticulated shell and different parameters, which including the different place, number and damp coefficient. By means of different parameter analysis, the rules of vibration reduction effect on the reticulated shell with viscous damper system is acquired.Lastly, the seismic performance on the optimum partial double layer reticulated shell is summed up and suggestions are proposed for further research.