ABSTRACT
In the 20th Century use of lighter material such as steel compared to RCC structure has increased in construction of building. These lighter materials are susceptible to dynamic loading like earthquake, wind etc. Structure made from steel subjected to dynamic loading can result in high response if the natural frequency matches the forcing frequency. To counter this force many strategies are used to control seismic response of the structures. For the present study, development of passive damping device to control seismic response of steel building is targeted. An attempt is made to characterize Pneumatic base passive damper through an experiment. The Pneumatic damper is fabricated and tested for cyclic loading in the developed test-setup. Hysteric behavior of Pneumatic type damper is studied. These dampers are also installed in SDOF building system and analyzed under free and forced vibration. Dynamic properties like damping co-efficient and frequencies are ascertained under free and forced vibration. Forced vibration study is carried to evaluate coupling and transmissibility of the SDOF building model. Significant increase in damping is found when Pneumatic dampers are added to structure.
