SEISMIC RESPONSE AND ESTIMATION OF EQUIVALENT DAMPING RATIOS OF STRUCTURAL ROCKING SYSTEMS USING SIMPLIFIED MODELS

• MIDORIKAWA Mitsumasa

  Grad. School of Engng., Hokkaido Univ.

• KUSAKARI Takayoshi

  Grad. School of Engng., Hokkaido Univ.

• ISHIHARA Tadashi

  Nat'l Inst. for Land and Infrastr. Management, MLIT

• ASARI Tetsuhiro

  Grad. School of Engng., Hokkaido Univ.

• AZUHATA Tatsuya

  Nat'l Inst. for Land and Infrastr. Management, MLIT

Bibliographic Information

Other Title

• 簡易解析モデルによるロッキング構造システムの地震応答性状と等価減衰定数の評価

Abstract

Previous studies have suggested that rocking vibration accompanied with foundation uplift motion might reduce the seismic damage of buildings subjected to severe earthquake motions. In this paper, the seismic response of simplified analytical models of rocking frames with column-bases allowed to uplift is evaluated by numerical analyses. The results are: 1)The base shear spectra for rocking models subjected to an earthquake motion demonstrate the definite reduction of base shear as compared to the fixed-base models over a certain range of natural period; 2) The total input energy exerted to rocking models during uplift motion is reduced by the amount of the incremental potential energy; and, 3) The vertical component of earthquake motions does not much affect the horizontal responses of rocking models but increases slightly their uplift response displacement.

Journal

• Journal of structural engineering. B

  Journal of structural engineering. B (56), 237-245, 2010-03-27

  Architectural Institute of Japan

Keywords

• Seismic response
• Single-mass model
• Rocking vibration Base shear spectra
• energy response
• Equivalent damping ratio

Details

• CRID: 1573668927678419328
• NII Article ID: 110009706292
• NII Book ID: AN10249636
• ISSN: 09108033
• Web Site: https://www.aij.or.jp/paper/detail.html?productId=398525
• Text Lang: ja
• Data Source:
  • CiNii Articles
  • KAKEN