PROPOSAL OF DESIGN FORMULAS OF TUNED MASS DAMPERS WITH INITIAL DISPLACEMENT TO CONTROL IMPULSE RESPONSE FOCUSING ON VIBRATION MODES

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  • YOSHINAKA Susumu
    Assoc. Prof., Urban Engineering, Faculty of Engineering, Osaka City University, Dr. Eng.
  • TANIGUCHI Yoshiya
    Prof., Urban Engineering, Faculty of Engineering, Osaka City University, Dr. Eng.

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  • 振動モードに着目したインパルス応答制御のための初期変位付与型TMD設計式の提案
  • シンドウ モード ニ チャクモク シタ インパルス オウトウ セイギョ ノ タメ ノ ショキ ヘンイ フヨガタ TMD セッケイシキ ノ テイアン

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Abstract

In this study, we aim to propose tuned mass dampers with initial displacement that are possible to control impulsive seismic responses effectively for architectural structures. In advance of the study on control of seismic responses, we aim to propose design formulas to control the structural responses subjected to impulse forces. In our previous study, we have proposed the design formulas using the optimal tuning and damping ratios for harmonic ground vibration. But to improve control effect on overall time history responses is difficult, because these formulas are based on the principle of the beating phenomenon. Then, in this paper, we focus on the vibration property when the damping ratio of the tuned mass damper is larger than that of our previous study and propose new design formulas with high control effect on impulse forces. Moreover, we propose design formulas considering the damping of the structure.

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