| Benchmark control problem is to provide a clear basis to evaluate the efficacy of various structural strategies. In this paper, the 9-story steel frame of the nonlinear benchmark was selected as an analysis model. The finite element model about the same benchmark model was created using the ANSYS software. The model analysis and the seismic nonlinear analysis of this benchmark model were done. In the end, the numerical results of the benchmark model controlled with Rotational Passive Tuned Mass Damper indicate that the Rotational Passive Tuned Mass Damper is a good dissipation device and the analysis of structural dissipation control using ANSYS is convenient.Based on current design codes of our country and domestic and overseas relative research achievements, the practicability and effectiveness of the rotational PTMD are approved through systematical theoretic modeling and numerical computation. Computer simulations on steel frames under Earthquake loading have been performed via ANSYS—a great finite element analysis program—on the basis of non-linear finite element analysis theory. In the procession of the simulation, Von-Mises yield criterion and bilinear isotropic hardening stress-strain relationship have been used for steel bar.The main contents of this dissertation are listed as follows: First, the finite element program of analysing the steel frames was verified. The author analyzed the steel frame by the finite element program of ANSYS and compared with documentation, the result showed that analyzing steel frames by using the program is feasible. Second, the nonlinear analysis is made on the steel frames. Base on the 9-story steel frame of the nonlinear benchmark, the effects of the rotational PTMD varying parameters, such as mass ratio, damping ratio, frequency of PTMD, on earthquake responses are discussed. The evaluation criterion for benchmark problem is given and numerical results show that rotational PTMD can control the earthquake responses efficiently. |
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