2007 Fiscal Year Final Research Report Summary
Research on Connecting Method Between Hysteretic Damper and Reinforced Concrete Frame
| Project/Area Number |
18560550
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Building structures/materials
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| Research Institution | Yamaguchi University |
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Principal Investigator |
INAI Eiichi Yamaguchi University, Graduate School of Science and Engineering, Professor (10314816)
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| Project Period (FY) |
2006 – 2007
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| Keywords | Vibration Control / Cost Reduction / Damper / Joint |
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| Research Abstract |
Recently, pillar type hysteretic dampers have been applied to high-rise reinforced concrete (R/C) buildings. This pillar is originally H-shaped steel and has low yield strength steel in the web at the middle height. In R/C frames, the both upper and lower ends of the pillar are usually connected to the R/C girders using end plates and anchor bolts, and also encased by R/C base to increase the shear deformation of the web. However, the stress transfer mechanism between the pillar and the R/C base has not been clarified. The inelastic behavior of the R/C base has not been sufficiently investigated, which has influence on the performance of the damper. Furthermore, this type of connection using anchor bolt is very complicated and not economical in building construction. The purpose of this research project is to develop a new and more rational connecting method of pillar type hysteretic dampers and to clarify the stress transfer mechanism and the cyclic behavior of the pillar type hysteretic damper.
The following results are obtained from this research project.
1. A new type connection, which has only stud shear connectors at the flange of H-shaped steel in the R/C base, was developed. In the experiments, 1/2 scale pillar type hysteretic damper specimens using this connection showed excellent performance as the damper.
2. As for the behavior of the R/C base, models for the stress transfer mechanism and the load-deformation relationship were obtained from the analysis of the experimental data. The design method for the R/C base was developed.
3. A model for the load-deformation relationship of the pillar type hysteretic dampers was proposed. The model is considering the inelastic flexural and shear deformations of the R/C bas, and can be used in earthquake response analysis of buildings with the pillar type hysteretic dampers.
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