2023 Volume 88 Issue 810 Pages 1273-1283
The authors developed the seismic damping retrofitting method by installing energy absorbing devices on the outside of reinforced concrete buildings. The devices are composed of steel braces and independently developed ring mechanism type friction dampers. In a stage of development, the load generating mechanism and dependence on various vibration conditions were clarified. In addition, age-related changes of friction load were verified by testing friction dampers used on buildings for 20 years subsequent to the application of the seismic retrofitting. In this paper, the performance of friction dampers was clarified, and also the efficacy as earthquake resistant retrofitting devices was verified.
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