Research On The Similitude Theory Of Dynamic Model Tests Based On Numerical Simulation

As an ancient technology, structural model tests still plays an important role in the filed of structural engineering currently, especially for shaking table tests.This thesis addresses the dynamic similitude theory and numerical simulation of shaking table test. In particular, it focuses firstly on the similitude law of model tests supplemented with arbitrary artificial mass. Then it focuses on the nonlinear numerical simulation of shaking table test.Shaking table tests which had been carried out recent years were summarized. Some problems existing in shaking table tests were presented at the following contents and some problems were discussed. Further studies were placed on the similarity law about arbitrary artificial mass which then proposed a general similarity law suitable for small scale models with arbitrary artificial mass.Numerical simulations of a four story RC frame shaking table test model were systematically carried out. And the OpenSees (Open System for Earthquake Engineering Simulation) finite element system was adopted to do the analysis of the finite element models including prototype structure, adequate model, scaled down structure supplemented with 40% artificial mass and test model. During the finite element analysis, elastic and elasto-plastic time-history analysis were both taken.According to the results of elasto-plastic time-history analysis of models that encountering earthquake of seldom intensity IX, structural response were compared and evolution of structural plasticity were obtained. Reliability and correctness of the finite element analysis model adopted in this thesis were verified through comparison between test results and nonlinear numerical simulation results of test model.According to the comparison between numerical simulation results of prototype structure and scaled down structure supplemented with 40% artificial mass, the general similarity law proposed in this thesis were feasible and correct.Finally, theoretical studying and comparison between analytical results of test model and of scaled down structure were taken. Preliminary studies were placed on the integration between shaking table test and numerical simulation.