Shaking Table Model Design And Dynamic Analysis For The Limited-beyond High-rise Building

An earthquake shaking table model(l:30) was established by taking the Wuhan ShiMao JinXiu Changjiang A2 Block Building 1 unit 3 as an example, base on the similarity theory and the structure static and dynamic performance equivalent principle; than the earthquake load input and the test project design were completed, and the dehiscence intensity and the structure destruction form as well as the destruction principle of the modle were studied, and weaken spot were also pointed out so that to put forward some proposals to the structural design; Simultaneously a large-scale finite-element method software was uesed to carry on the dynamic analysis to the structure model, then 3 form seismic excition were inputed into the modle in order to research the top layer horizontal time-history curve, the top layer acceleration-time curve, as well as the horizontal displacement along the height of the distribution curve. The result indicated that the earthquake response analysis is reasonable by using the software to establish the three-dimensional model, the earthquake resistance requests of the prototype structure are beign satisfied.The following conclusion can be drawed by comparised the earthquake shake table test results and the finite-element analysis results.1. The structure modle's first mode of self oscillation cycle is 0.394s, pushes to the prototype structure is 4.81s, and the location remarkable cycle is 0.33s, so the the location remarkable cycle were avoided by the prototype structure, and the resonance effect also.2. The shearing force wall structure were used in this high-rise construction,and the horizontal rigidity of structure is large, and the rigidity of this two main axle direction is dissimilar, so the rigidity of the structure in Y direction is smaller than in the X. But because of unsuperposion of the mass center and the rigidity center, the structure vibration form is performance as translation company with the torsion, the analysis can be able to response the structure actual stress condition precisely by studeis the first 15 step mode of vibration.3. The dynamic response of the structure can be obtained by inputs the El_centro excition, the Taft excition as well as the Wuhan artificial excition into the finite-element method software, and analysis the structure's time history curve, the level displcements, the angle of level displacement, the acceleration time history curve and so on. It indicated that the structure earthquake resistance performance is well. 4. The influence of the high mode of vibration is quite obvious to the structure, and the weak spot is at upside of the structure. There are a little difference between the experimental result and the compute result, but meet closely on the whole.Finally, some proposals and improvements are given to the experimention and the computation, The related methods and the conclusions were hoped to give some references to this similar ultra-high-rise structure for the shaking table modle experiment design and the dynamic analysis in the future.