The Application And Anti-seismic Research Of Viscous Dampers On The Technology Of Adding Steel Storys On The Top Of Frame Structure

Retrofitting the structure with steel in floor technology is most commonly,For the hybrid structure,《Seismic Design of Buildings》(GB50011-2008)are vertical irregular structure, add layer just under the upper part of the prevalence of soft factors, which are not conducive to seismic. In view of the problem, this additional layer in the center of steel frame structure supported on a set of energy dissipation devices - viscous damper, additional layer of structure used to adjust the overall damping ratio, earthquake energy consumption. Analysis shows that energy dissipation system is largely reduced plus story steel frame is too large lateral displacement between layers, solution produced steel in floor whipping response, lower level shear and column axial force, story drift control the location and time appears to increase level of the effective suppression of structural vibration response, so that the whole structure to meet seismic code requirements. This paper studies include(1) Add layers of different seismic response analysis system: This 10-story reinforced concrete frame structure as the basic model, extend to the steel in floor, increase with the general support level system with energy dissipation (viscous damper) in Canada Layer. The original structure and the different levels in many cases and system in earthquake of rare in the process can respond more consumer damping system analysis in the structure of the important role.(2) Various parameters of viscous dampers in floor systems in the seismic performance of factor analysis: One of the speed index of viscous dampers were taken for the nonlinear and linear cases, additional layers of impact energy dissipation,at the same time under different damping values,comparative analysis of the seismic response in floor. Based on the large amount of calculation and analysis of various parameters, various parameters for the viscous dampers in floor renovation project in the actual specific applications in certain reference value.(3) Discusses the sluggish attenuator the different form and the scheme of arrangement to the steel structure superimposed layer earthquake resistance performance influence: Form a reasonable damper, Viscous damping will play its full role in floor effectively reduce the seismic response. Of the damper between the different arrangement of layers in Canada under the program were compared, the computed result provides certain reference for the sluggish attenuator in the steel structure frame superimposed layer transformation project development and the design method research.(4) Analysis of different pillared foot plus handling system for energy dissipation in floor under the impact of seismic performance: Analysis of linear and nonlinear dampers foot in the hinged column, half just the terminal foot and just under the terminal foot three kind of Canada story post foot processing plan met with meets the earthquake to respond rarely, For engineering practice and viscous dampers on foot steel column with the choice of treatment options to do a preliminary check.