Soil-structure interaction(SSI)effects may play significant roles in TMD's effectiveness under earthquake excitations.Therefore,the seismic control performance of TMD for tall buildings considering SSI effects are investigated in this paper.A new optimization method for the seismic design of TMD is proposed in this paper,based on the improved particle swarm optimization algorithm.A 40-story benchmark structure with a uniform mass distribution and a linear stiffness distribution along its height is adopted as the superstructure.The optimization goal is to minimize the root mean square displacement of the top layer under different soil types subjected to earthquake excitations.The results showed that,ignoring the soil-structure interaction eff ects may result in an inappropriate estimation of the seismic responses and the seismic control performance of TMD for high-rise structure.The optimal parameters of TMD are closely related to the soil type and seismic wave.The optimized TMD can effectively decrease the displacement response of the top floor without the increase of peak acceleration.The optimized TMD dissipates the overwhelming majority of the input energy,and it greatly decreases the structural energy.
关键词
土与结构相互作用/调谐质量阻尼器/优化设计/减震控制/地震响应分析
Key words
soil-structure interaction/tuned mass damper/optimum design/seismic control/seismic response analysis
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