Forced vibration test of a building with semi-active damper system

✍ Scribed by Kurata, Narito; Kobori, Takuji; Takahashi, Motoichi; Ishibashi, Toshihisa; Niwa, Naoki; Tagami, Jun; Midorikawa, Hiroshi

• Publisher: John Wiley and Sons
• Year: 2000
• Tongue: English
• Weight: 233 KB
• Volume: 29
• Category: Article
• ISSN: 0098-8847
• DOI: 10.1002/(sici)1096-9845(200005)29:5<629::aid-eqe928>3.0.co;2-9

✦ Synopsis

The authors developed a semi-active hydraulic damper (SHD) and installed it in an actual building in 1998. This was the "rst application of a semi-active structural control system that can control a building's response in a large earthquake by continuously changing the device's damping coe$cient. A forced vibration test was carried out by an exciter with a maximum force of 100 kN to investigate the building's vibration characteristics and to determine the system's performance. As a result, the primary resonance frequency and the damping ratio of a building that the SHDs were not jointed to, decreased as the exciting force increased due to the in#uence of non-linear members such as PC curtain walls. The equivalent damping ratio was estimated by approximating the resonance curves using the steady-state response of the SDOF bilinear hysteretic system. After the eight SHDs were jointed to the building, the system's performance was identi"ed by a response control test for steady-state vibration. The elements that composed the semi-active damper system demonstrated the speci"ed performance and the whole system operated well.