Study On Seismic Control And Design Theory Of The Energy Dissipation Braced Frame Structure With The Lead Extrusion Dampers

The traditional method of upgrading the seismic behavior of the structure is through increasing the section and the reinforcement of the component and so on, that is the way of " Yingkang" earthquake to upgrade the seismic behavior of the structure, but the appearance of the technology of energy dissipation changed the main way of upgrading structure behavior. This method is though the non-load-bearing component which causes non or little effect on the bearing capacity and the safety of the structure, firstly dissipating the earthquake energy which is absorbed by the structure at strong earthquakes, which largely attenuates the responses of the structure, thus ensure the safety of the main structure at strong earthquakes. At present, the technology of energy dissipation is widely used in various engineering fields.At first, this article builds a three-dimensional model of a 12-storey energy dissipation braced frame structure with the lead extrusion dampers, and uses the fast nonlinear analysis (FNA) method of the program of the SAP2000 to analysis it. Secondly, it uses the maximal displacement of the top floor as the control parameter, investigating the problem of the optimized arrangement of the energy dissipation braces with the lead extrusion dampers which are at the direction of the horizon and the height of building. The concrete steps are:(1)considering the effects of lateral-torsional coupling,calculating the story displacement,the inter-story displacement,the inter-story displacement angle of the model structure to which the energy dissipation braces with the lead extrusion dampers aren't added, then arranging proper number of the energy dissipation braces at the proper story where the inter-story displacement is greater, to form the energy dissipation braced frame structure with the lead extrusion dampers;(2) calculating the story displacement,the inter-story displacement,the inter-story displacement angle of the energy dissipation braced frame structure with the lead extrusion dampers under strong seismic action at various kings of arrangements, summarizing the variation of the maximal displacements of the top floor of the energy dissipation braced frame structure with the lead extrusion dampers at various kings of arrangements, finding the arrangement which behaves better as the calculation basis;(3)making the dynamic reaction analysis on the frame structure without energy dissipation braces,frame structure with suffused common braces and the energy dissipation braced frame structure with the lead extrusion dampers whose arrangement behaves better ,which is found at step (2) under the frequent earthquake and strong seismic action, comparing the effects of passive control of the energy dissipation braced frame structure with the lead extrusion dampers, investigating its control mechanisms and laws.The results show that the arrangement of the energy dissipation braces with the lead extrusion dampers that this article provides can largely dissipate the energy of the earthquakes, evidently reducing the seismic response of the structure, which is a better way of passive seismic control of the frame structure and worthing further study and spreading use.