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Kasai K.,Tokyo Institute of Technology | Baba Y.,Tokyo Institute of Technology | Nishizawa R.,Tokyo Institute of Technology | Hikino T.,Hyogo Earthq Engineering Research Center | And 3 more authors.
Journal of Structural and Construction Engineering | Year: 2012

Realistic 3D-shake table tests using E-Defense were conducted for full-scale 5-story building specimens with/without dampers in order to evaluate seismic performance at ground motions of scales ranging from minor to catastrophic levels. The building was tested repeatedly, inserting and replacing each of 4 damper types. This paper focuses on the first test conducted with steel dampers. It discusses damper and building specimen, testing and table control methods, validations of test results, performance of the passive control scheme, and in- and out-of-plane bending of the steel dampers.


Kasai K.,Tokyo Institute of Technology | Yamagiwa H.,Tokyo Institute of Technology | Nishijima M.,Tokyo Institute of Technology | Baba Y.,Tokyo Institute of Technology | And 3 more authors.
Journal of Structural and Construction Engineering | Year: 2014

Realistic 3D-shake table tests using E-Defense were conducted for full-scale 5-story building specimens with/without dampers to evaluate seismic performance, using ground motions of scales ranging from minor to catastrophic levels. The building was tested repeatedly, inserting and replacing each of 4 damper types. This paper focuses on the second test conducted with nonlinear viscous dampers. It discusses damper and building specimen, testing and table control methods, validations of test results, various characteristics and control effects of the viscous dampers.


Kasai K.,Tokyo Institute of Technology | Yamagiwa H.,Tokyo Institute of Technology | Baba Y.,Tokyo Institute of Technology | Ito H.,Tokyo Institute of Technology | And 2 more authors.
Journal of Structural and Construction Engineering | Year: 2013

Realistic 3D-shake table tests using E-Defense were conducted for full-scale 5-story building specimens with/without dampers to evaluate seismic performance, using ground motions of scales ranging from minor to catastrophic levels. The building was tested repeatedly, inserting and replacing each of 4 damper types. This paper focuses on the second test conducted with bilinear oil dampers. It discusses damper and building specimen, testing and table control methods, validations of test results, various characteristics and control effects of the oil dampers.


Kasai K.,Tokyo Institute of Technology | Hikino T.,Hyogo Earthq Engineering Research Center | Ito H.,Tokyo Institute of Technology | Ooki Y.,Tokyo Institute of Technology | And 3 more authors.
Journal of Structural and Construction Engineering | Year: 2011

Realistic three-dimensional shake table tests using C-Defense were conducted for full-scale 5-story building specimens with/without dampers to evaluate seismic performance, under ground motions of a variety of scales ranging from minor to catastrophic levels. The building was tested repeatedly, inserting and replacing each of 4 damper types, i.e., steel, viscous, oil, and viscoelastic dampers. This paper focuses on the tests conducted without dampers at the end of the whole test series, and discusses responses and properties of the steel frame portion of the specimen.

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