Comparative analyses of dynamic characteristics between two aluminum alloy single-layer spherical shells, which have the same span, same rise-span ratios and same bars but different material characters of elasticity and visco-elasticity, are presented. Influences about material viscosity on vibration behaviors of single-layer spherical aluminum alloy reticulated shells are illustrated. The results show that: there are great differences between the resonance frequencies of two shells but the linear harmonic response properties are basically the same; the dynamic characteristics of these two shells are greatly different under harmonic loads or seismic loads, and the dynamics characteristics are greatly influenced by the viscous properties of the material itself.

Dynamic Characteristics of Single-Layer Spherical Aluminum Alloy Reticulated Shell

Longspan spatial reticulated shell structures are usually important structures, and its antiearthquake ability counts for plentiful people life and national property, so it is necessary extraordinarily for the structures to adopt some antiearthquake measures.At present, it is a new idea to combine the structural control technique with antiearthquake design of longspan reticulated shell. In the paper, the research actuality of earthquake mitigation control of longspan reticulated shell is introduced, and some important topics to be solved in the future are proposed.

Study and development on earthquake mitigation control of long-span spatial reticulated shell structure

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Study and development on earthquake mitigation control of long-span spatial reticulated shell structure