| In some special places, the reinforced concrete frame is possibly subjected to the harmonic loads, which result in larger frame displacements, and perhaps make it unsafe. Based on extensive achievement on the RC frame dynamic response by the domestic and overseas experts, the finite element model is established, and the dynamic response numerical analysis is done in this paper. This paper had designed the different plane stick-system finite element model, and then calculated the free-vibration frequency and dynamic response of the frame to the harmonic loads. Through the analysis of calculation, the disciplinarian that the structure free-vibration frequency changes relating to the structure form and the common law about deformation and displacement of structure to the harmonic loads can be attained. According to the research, the conclusion is as follows. Firstly, by finding out the disciplinarian of R.C. frame free-vibration frequency relating to structure form, the structure form would be adjusted when the proceeding structure design and the free-vibration frequency or period would be made to avoid validly the outstanding period of local place and the frequency of loads which encountered frequently, and the serious destroy resulted from resonance would be reduced. Secondly, using the law about deformation and damage form of structure to the harmonic loads with some special frequency, the weakness can be determined in the proceeding of structure dynamic design and measurement. The dynamic response can be effectively controlled.By comparison between the result of instance and the theory conclusion, the finding contribute to the dynamic design of structure under the harmonic loads, and make the building more reliable in safe and more reasonable in economy. It is significant to engineering practice and worthy to be consulted. |
