Research And Design Of The Isolation Structure Scale Model Shaking Table Test

Shaking table test is through the vibration table input specific artificial wave and seismic wave,the incentive model of table structure,to simulate and reproduce the real earthquake process,is the study of structural dynamic response and failure mechanism of the earthquake,the most direct method research and evaluating the seismic performance of structures is also one of the important means,it can timely reproduce all kinds of artificial wave and seismic wave effect to the structure of the process,to find out the part of the structure is relatively weak,and for the structure design more reasonable seismic method is used to provide reliable basis.Firstly,under the weight of the model structure is insufficient,the prototype model and dynamic elastic stage similar relationship was deduced by the model and numerical analysis of the effect of gravity distortion effects on the structural dynamic response with the traditional structure of isolated structure proved a similar relationship applies only to structures under earthquake-induced reactions such as displacement reaction,the internal forces of reaction similar to member acceleration and earthquake-induced,but member earthquake and static loads under the combined effect of internal force reactions are not similar.And isolated structure also will be affected by gravity distortion effects,and the impact of consistent results with the traditional structure.In order to solve in the base isolation structure scale model shaking table test,the dynamic characteristics differences caused by the actual model and the design of original structure's defferences in size/material and selection of bearings,to realize the study of the bearing and original structure's reasonable simulation and design.Through the simplified mechanical model of the system,and analysis the detemination of the soving parameters results,firally obtained the optimal parameters and provided the basis of relevant parameters fine selction,to predict the response of the original structure and isolation bearing under earthquake more realistic.It can be used as refernce to the design of relevant base isolation stucture of the scaled model shaking table test.For isolation structure shaking table test model design practical design method is proposed,and can better response characteristics of the original structure.The main work is the design of the structure model of the isolation,selection of bearings and the shaking table test excitation frequency selection;Production test flow chart,facilitate can clear test process;Through an example,providing some references for related test and help.