| Energy dissipation technology occupies a large proportion in the field of vibrationcontrol of engineering structure, is one of the main research direction of earthquake in civilengineering structures. It has become the hot problems in the vibration control of structureresearched by many experts and scholars in the world. Metallic dampers is a kind of effectiveshock absorber damping as energy dissipation technology, it has many advantage, convenientof draw materials, manufacture and installation, high durability, low price. Metallic damperscan provide additional stiffness and damping for the structure, by the steel good hystereticperformance into the structure of energy consumption, p rotecting the safety of structures.Because of the damping effect is remarkable, therefore it be used for vibration control is notonly used in the new building, but also the old building repair and reinforcement. In thecourse of the study, the author has done the following work:(1) Firstly this paper introduces the classification of structural vibration control and themetallic dampers development at home and abroad, the author according to the currentsituation of the metallic dampers development decided what to research in this paper.(2) In a single round steel damper and double X shaped steel damper as an examplewhich developed by Professor Li Hongnan of Dalian University of Technology, the energydissipation mechanism of monolithic metallic damper is analyzed，the hysteretic condition tocarry on the numerical analysis, and compared with experimental data. Using ANSYS finiteelement software to simulate the pseudo static test of steel damper single round hole steeldamper and double X type, obtained with the test are in good agreement with the hysteresiscurve, verified the reliability of finite element software ANSYS simulation, and the two kindsof dampers has large initial rigidity and good energy dissipation ability. Analysis of theseismic performance of building structures equipped with single round hole steel damper, andsimulation with Combin40monolithic metallic damper unit, get a good simulation effect.(3) The simulation calculation by using finite element software, seismic waves using ElCentro wave and Taft wave and an artificial simulation wave for steel frame structure,installation of metallic damper under frequent earthquake elastic time history analysis andunder rare earthquake elastic-plastic time history analysis. Research and analysis of theinstalled damping performance with high steel frame structure with metallic dampers.Research shows that, the metallic damper used for building structure, can effectively reduce the seismic response of structure, significantly reduced the maximum displace ment,maximum inter storey displacement angle, maximum acceleration and maximum she ar forceequivalent.(4) The steel frame structure under frequent earthquake elastic time history analysis andunder rare earthquake elastic-plastic time history analysis, comparative analysis of thestructure with metallic damper at different position of the maximum displacement, maximuminter storey displacement angle, maximum velocity, maximum acceleration equivalent. Thedamping effect of the individual case, draws the co nclusion, only the floor layer metallicdamper is arranged on the lower part of the structure about75%can be achieved bettereconomic benefits to achieve good damping effect at the same time. |
