The Research Of Hybrid Testing Method By Two Degrees Of Freedom

The Hybrid Simulation Testing also calls that the Hybrid Experiment, it is a structure experiment method based on the Pseudo-Dynamic test, and it has been in the United States, Japan, Europe and other countries and regions had a good development and application. Now foreign researchers have achieved with the Hybrid Experiment to simulate the frame structure under the action of earthquake damage, and the Substructure Networked Hybrid Experiment, these experiments prove that the Hybrid Simulation Testing is feasibility. For domestic researchers, the Hybrid Simulation Experiment method is still in initial stage, just realized the OpenSees of finite element software, the OpenFresco of communication software, MTS instrument association.With the development of the Pseudo-Dynamic test and the Hybrid Simulation Testing, its integral algorithm has been adopted to be more perfection, from the initial central difference method and Newmark method to the α- OS method which has the correction function, etc. These integral calculation methods can be better with the finite element software, instruments and the command output form, and be closed loop form of treatment, so as to satisfy the accuracy between calculation and test.Different from the traditional Pseudo-Dynamic Testing, the Hybrid Simulation Experiment is a method of combining the finite element software and testing devices, so we can use the finite element modeling software to simulate and test of large and complex structure characteristics of the system under the condition of the ground motion. And finally, this paper uses the finite element software OpenSees and communication software OpenFresco to build a hybrid model of brace frame structure model, in the case of no test instrument on the simulation test, and with the finite element software OpenSees to establish the same numerical model are compared, the results can better match.