Study On The Dynamics Analysis On Mixed-layer Structure

With the rapid development of urban economy, urban space has become more tense in recent years, the lower part of the frame structure, that is, a top for the light steel structure with concrete portal frame steel bearings as the new structure began to be used Engineering-mixed layer structure. With single-door frame and steel frame structure comparison can be found mixed layer integrated economic indicators than the door frame and steel frame structure of single integrated economic indicators, is an industrial building and construction industry, a perfect combination of people.With mixed layer structure, due to the lower part of the top materials and different materials, resulting in the overall structure of the stiffness distribution along the vertical direction is uneven, especially in the light steel structure and concrete portal frame junction, lateral stiffness occurred significantly mutation, where it is easy to form weak node, the two are completely different material properties, which they manifested in the earthquake process dynamic characteristics is completely different, so the mixed-layer structure, the structure of the overall analysis should be carried out. This article is based on large-scale finite element software ANSYS, the finite element method, a three-tier structure, plus a layer of light steel reinforced concrete steel of the mixed-layer structure model, taking into account the shear deformation, with the Block-Analysis lanczos mixed layer structure of the vibration characteristics, obtained from the mixed layer structure and the natural frequency of vibration cycles, and mixed-layer structure of the seismic performance of the reflection spectrum analysis and dynamic analysis, obtained mixed layer the overall structure under earthquake deformation and the main manifestations of the specific location of weak node; and weaknesses in the structure of foot column was studiedIn the column foot to connect the node to connect the introduction of the definition of the semi-rigid connections, the structural column base connection to do some simple form of, for the design of such a structure reference.