Development of Advanced Friction Sliding Damper

Abstract eng:
Many vibration control systems have been developed to reduce damage to buildings during earthquakes. We developed a friction sliding damper using high-tension bolts in the latter half of 1990's and applied it to a building. This damper absorbs a building’s vibration energy using the frictional energy consumed by a brake pad and a stainless plate fastened with the high-tension bolts. The main application form of this damper has been as a brace, but the number of stud-type application forms is increasing. In the other side, seismic retrofit is necessary for buildings that don't provide the seismic performance required by the Japanese Building Standards Law. Various technologies have been proposed to improve the seismic performance of such buildings. For example, building strength has been improved by adding braces and walls, building deformation performance has been improved by wrapping carbon fiber around columns, and seismic forces have been reduced by installing new base-isolation systems. However, progress in seismic retrofit has been hampered by problems of loss of building amenity, high cost, and construction difficulty. To solve these problems, a method has been developed of installing stud-type friction sliding dampers outside an existing building. This paper describes performance confirmation dynamic loading tests that have been performed on full-scale brace-type and stud-type friction sliding damper set in a steel frame, and a dynamic loading experiment result on an R/C frame equipped with friction sliding dampers.

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