| Nowadays with the continuous improvement of housing requirements for humanity,the building is more and more exquisited,more and more diverse functioning,more and more secure for living.Suspension structure with hanging the stores in space,reducing the contact space of the ground,and has combined structural control thought with its structural design.Isolation technology is used in buildings to achieve the effect of isolating earthquakes.A simplified numerical analysis model for the upper suspension structure and bottom isolation system is established.Taking a 5-storey building as an example,the upper three storeys are suspended structure,suspended on the top hanging beam with a rigid hanger rod,and the following two storeys are supported on the ground with rubber isolation bearings.This work was started from Lagrange equation in structural dynamics,and the solution work was programmed with MATLAB language and ORIGIN software to present the whole dynamic response of the structure under different seismic waves input.The dynamic response diagram of the upper suspension structure is compared with the isolated structure and the only suspension structure under the condition that the influence parameters are certain.Through analysis,the conclusions are drawn: the seismic dynamic response of the isolated structure with the upper suspension is notably reduced compared with the simple suspension structure and the isolated structure.With the change of influence parameters,the drift of inter-storey and the change of storey acceleration are more obvious than that of storey drift and storey velocity.The upper suspension and bottom isolation structure is with not only exhibition of suspension structure but also with that of seismic isolation structures,which is believed to combine them into composite seismic mitigation efficiency.For the upper half superstructure,it is with the double seismic mitigation efficiency,for the bottom it is in due course with the seismic isolation efficiency. |
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