| Among the existing and new buildings in our country, the reinforced concrete frame structure is the most primary structure system. However, from the earthquake damage of the real earthquakes in the recent years, the performance of the reinforced concrete frame structure is not so satisfactory. It is not difficult to find out that the existing Anti-seismic designing method of the reinforced concrete frame structure is uneven in terms of the whole Anti-seismic design. Meanwhile, due to limits of various aspects, many dangerous factors exist in the process of the construction. Therefore, the reinforced concrete frame structure has many safety problems under the influence of violent earthquakes. How to enhance the reliability and safety of the reinforced concrete frame structure under the influence of violent earthquakes in an effective way has become one of the focuses of the engineering designers and the researchers. Aiming at this problem, this paper proposes the designing scheme of light energy-dissipation swaying structure system on the basis of the existing research result by making use of the anti-seismic design theory based on the performance and studies the deformation pattern, energy-dissipation mechanism and dynamic reliability of the light energy-dissipation swaying structure system under the influence of the earthquake. The main content includes the following aspects:(1) First of all, establish the accurate finite element model of the reinforced concrete frame structure and the light energy-dissipation swaying structure system respectively by taking the actual engineering structure as the research target. Secondly, make pushover analysis of the reinforced concrete frame structure and the light energy-dissipation swaying structure system respectively based on the displacement. Finally, focus on the discussion of the influence on the anti-seismic performance of the structure system by the reinforced concrete swaying structure of different stiffness ratio by combining the regulation of the existing anti-seismic design in accordance with the analysis result.(2) Having established the dynamic calculating model and differential equation of motion by aiming at three structure systems:the reinforced concrete frame structure and the light swaying rigid frame structure and light energy-dissipation swaying rigid frame structure. First of all, make analysis by adopting the method of dynamic elastic-plastic time history analysis and obtain the structural dynamic response of each structure system under the influence of earthquakes. Secondly, calculate and study the energy-dissipation mechanism of three structure systems with the energy method from the perspective of energy. Finally, discuss the influence on the anti-seismic performance of the three structure systems by the dynamic response and energy-dissipation mechanism under the influence of violent earthquakes.(3) Select20records of the real earthquakes and simulate the process of the three structure systems above, from elasticity, elastic-plastic to the ineffectiveness of the structure by adopting the increment dynamic analysis method. Draw the IDA curve of each structure system based on the different damage criteria according to the analysis results. Make16%,50%and80%IDA curve analysis of them respectively and obtain the anti-seismic performance level of each structure system under the influence of earthquakes of different levels.(4) Make analysis of the random response of the light swaying rigid frame structure system. On considering the uncertainty of the earthquake, calculate the influence of the dynamic reliability of the light swaying rigid frame structure by the reinforced concrete swaying rigid frame structure of different stiffness under the influence of frequent and rare earthquakes by adopting the method of combining pseudo excitation method with state space analysis. Make further calculation of the conditional failure probability of each structure system according to the conditional failure probability of each level obtained.(5) Conduct the simulative research on the shaking table tests by aiming at the seismic response of each structure system. Formulate the reduced scale test model of the reinforced concrete frame structure, light swaying rigid frame structure and light energy-dissipation swaying rigid frame structure respectively by combining the actual project and theoretical analysis. Conduct the shaking table tests of33working conditions in the end and get the dynamic response data of each measuring point of the structure model under the influence of dynamic loading. Find that the final results coincide with the regular patterns of the theoretical analysis by contrasting the calculating results of the theoretical analysis with that of the numerical simulation. |
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