Actual Behavior and Design Method of Super-tall Isolated Building which has Uplift Mechanism

2016 Fiscal Year Final Research Report

• Project/Area Number: 15K14063
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Building structures/Materials
• Research Institution: Tokyo Institute of Technology
• Principal Investigator: Kasai Kazuhiko 東京工業大学, 科学技術創成研究院, 教授 (10293060)
• Research Collaborator: Thimamphant Sarun
• Project Period (FY): 2015-04-01 – 2017-03-31
• Keywords: 免震構造 / 超高層建物 / 浮き上がり / 地震応答解析 / 強震観測 / フレームモデル

Outline of Final Research Achievements

Seismic isolation has been applied increasingly to super-tall buildings with high aspect ratios. The applications however can lead to the tension failure of the laminated rubber isolators due the upward force against the isolators, and the technology to allow uplift of the isolator was developed is in actual use now. However, since performance of such technology has not been verified, the following studies were conducted:
(1)A 3-D frame model was created to simulate seismic behavior of a 20-story base-isolated bldg. that uses such technology and at has many sensors of acc., dis., and strains. The model located in the campus of Tokyo Institute of Technology is found to accurately simulate the bldg. behavior recorded during the past earthquake.
(2)Based on the 3-D dynamic analyses of the model using many different ground motion records, it's observed that the building with such technology could become critical in some cases and require further study on the uplift of base-isolated bldgs.

Free Research Field

工学