Modified Roof-Top Garden as a Tuned Mass Damper for Vibration Control of Building Structure Under Earthquake Excitation

Abstract

Tuned Mass Damper(TMD) is very popular to mitigate the vibration of the structure under any Qpe of random loadings like as Wind or Earthquakes. This researchwork mainly.focuses on to modify the roof- top garden as a passive vibration controlling devices (RTGD) using the same principle of TMD.One of the important features of TMD is using huge mass to create the inertial Jbrce against earthquake forces. This passive energy dissipation system is not neededany additional mass becatrse the mass o.f roof garden used as a TMD mass which is come from the mass of soil and plants. The roof and roof-top garden have been isolatecl by springs which have been given the spring fttrce and also installed q yiscous damper to provide the damping force against earthqtrakeforces. Partially saturated soil condition of roof top garden h.as been taken to qvoid the detttning elJbct. The obtained structural response under different earthquakes proved that this system is one of most capable to mitigate the Earthquake vibration ori,rn bi easily used in pract ically.for building thestructures.