The specimen-table interaction effects can significantly affect the accuracy of shaking table acceleration time history.Iterative control is often an important means to improve the reliability of test data.However,masonry,reinforced concrete and other structures are prone to enter the nonlinear mechanical state due to cracking,which is often not suitable for iterative loading.A simulation study is carried out on the iterative control method of the shaking table based on the surrogate specimen model.First,a surrogate specimen model with similar dynamic characteristics to the specimen was constructed,after completing the iterative loading of the shaking table and obtaining the driving command with the surrogate specimen model,a real specimen-shaking table test was carried out.The simulation results show that the shaking table iterative control based on the surrogate specimen model effectively reduces the influence of the specimen-table interaction on the system control performance,and realizes the high precision reproduction of the acceleration time history of the table.
关键词
振动台/试件-台面相互作用/替代试件模型/迭代控制
Key words
shaking table/specimen-table interaction effects/surrogate specimen model/iterative control
维普
万方数据