2009 Fiscal Year Final Research Report

A study on modal coupling effect of seismic isolated building with inclination of pile top by monolithic analysis of soil-pile-structure interaction and its control

Research Project

Project/Area Number	20760380
Research Category	Grant-in-Aid for Young Scientists (B)
Allocation Type	Single-year Grants
Research Field	Building structures/materials
Research Institution	Meiji University
Principal Investigator	KOBAYASHI Masahito Meiji University -> 明治大学, 理工学部, 准教授 (50373022)
Research Collaborator	NAKAZATO Kazuyuki 明治大学, 大学院・理工学研究科, 大学院生 MITSUHASHI Hajime 明治大学, 大学院・理工学研究科, 大学院生
Project Period (FY)	2008 – 2009
Keywords	免震構造 / 杭基礎 / モード連成作用 / 動的相互作用 / 杭頭免震構造 / 積層ゴム端部回転 / P-δ効果 / 水平剛性評価
Research Abstract	Seismic response of isolated buildings supported by a pile foundation like a mid-story isolated building is amplified by modal coupling effects. However, because the amplification and effect of soil-structure interaction are very small, an existing design method is able to be applied. In addition, the horizontal rigidity of base isolated building with inclination of pile top decreases to 80% when the rotation occurs at the edge of laminated rubber as compared with the condition without rotation. Therefore, it is necessary to consider amplification of deformation of laminated rubber by that effect.

(3 results)