Seismic Isolation Performance Of Tower Antique Buildings Based On MIDAS

Many famous ancient buildings which the past left us countless in the long river of history,and they are representative of the wisdom of the ancients.But because some reason they are less and less,so measures need to be taken to save it.Antique buildings and ancient buildings seem to be the same,but because of complex structures,it has different seismic properties.When the traditional seismic design can not satisfy the existing needs,people raise the idea of isolation.The study of seismic reinforcement of ancient buildings is of great significance.After studying many correlational document research,we first know about its inland and oversea research,study the kind of pedestal,mechanical performance and function used in the basic isolation.meanwhile,the merits and demerits of conventional underpinning technology are studied,and a rapid underpinning construction technology is sought for the existing tower frame buildings.And then simplify the actual engineering to establish a multi-mass structure model,listing the dynamic division equation to solve.Analysis and comparison of five seismic isolation models,the introduction of horizontal shock-absorbing coefficients,the judgment of the isolation model and non-seismic model differences,the shock-absorbing coefficient as an evaluation of the upper structure shock-absorbing index and combined with story drift,interlaminar shear,acceleration,energy consumption and other parameters,to select the optimal scheme.Finally,the weak position of the structure is analyzed in rare earthquakes,At the same time,the isolation layer is checked under multiple load combinations.And the horizontal displacement,maximum tensile stress and maximum compressive stress of the isolation pedestal are judged to meet the requirements of the relevant codes,and the guiding suggestions are put forward for the design of isolation and reinforcement.