To investigate the dynamic response and seismic performance of the tower structure in a traditional style building under earthquake motions,a specimen of Xi'an Tianren Chang'an Tower with a scale ratio of 1/15 was designed and fabricated and subjected to simulated seismic shaking table tests.The dynamic characteristics of the specimen,such as natural frequency,damping ratio,and stiffness degradation rule,were obtained through white noise frequency sweeping.The dynamic responses,including acceleration amplitude factor,floor displacement,inter-story drift ratio and shear force,were investigated under different earthquake intensities.The results indicate that the damage is relatively minor under rare earthquake excitation,mainly concentrates in concrete cracking near the column base.The natural frequency and stiffness slowly decrease with increasing peak acceleration,while the damping ratio increases.The acceleration amplitude factors at the top are notably higher than those of other stories.The overall distribution of shear force shows a decreasing trend with increasing height,with the dim stories being larger than the bright stories on the same story.The OpenSees software was used to establish the model and simulate the main results,and the seismic performance of the prototype structure was evaluated.It is shown that under the 8-degree frequent occurrence earthquake waves,the maximum inter-story drift is 1/782,and the base shear coefficients in both directions are 3.57％and 3.78％,respectively.Under the rare occurrence earthquake waves of 8-degree,the maximum inter-story drift is 1/128,which meets the requirements of the current design code.
关键词
传统塔式建筑/天人长安塔/振动台试验/有限元分析/动力响应
Key words
traditional tower building/Tianren Chang'an Tower/shaking table test/finite element analysis/dynamic response
维普
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