Development of steel pier with energy dissipation capacity and self-restoring capacity to reduce residual deformation

2014 Fiscal Year Final Research Report

• Project/Area Number: 24656279
• Research Category: Grant-in-Aid for Challenging Exploratory Research
• Allocation Type: Multi-year Fund
• Research Field: Structural engineering/Earthquake engineering/Maintenance management engineering
• Research Institution: Nagoya Institute of Technology
• Principal Investigator: GOTO Yoshiaki 名古屋工業大学, 工学(系)研究科(研究院), 教授 (90144188)
• Co-Investigator(Kenkyū-buntansha): EBISAWA Takemasa 名古屋工業大学, 工学研究科, 助教 (90332709)
• Co-Investigator(Renkei-kenkyūsha): INOUE Junya 東京大学, 工学系研究科, 准教授 (70312973)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 自己修復 / コンクリート充填橋脚 / 残留変位 / 局部座屈

Outline of Final Research Achievements

In this research, a low cost CFT pier with two internal bearing plates was developed such that the pier assumes high energy dissipation capacity along with self-restoring capacity to reduce residual deformations. First, it was extensively investigated by cyclic loading test, shake table test and a FE analysis how the material and geometrical parameters of outer steel pipe, diaphragms and in-filled concrete affect the energy dissipation capacity and self-restoring capacity. Second, based on the FE analysis, a new CFT pier model was proposed. In this CFT pier, two internal bearing plates were inserted into the location of a major crack of the in-filled concrete in order to prevent the failure of the crack surfaces caused by their cyclic closing and opening. Finally, the validity of the new CFT pier model was confirmed by a cyclic loading test.

Free Research Field

構造工学，耐震工学