This undergraduate thesis deals with the problem of dynamic response of a single-storey frame model to a seismic base excitation, provided that there is a mass suspended on the frame model as a passive damper. The aim of the research is to examine the effectiveness of suspended mass on reducing the oscillations of a single-storey frame. At the beginning of the thesis, equation of motion for a single-storey frame model with mass concentrated at the top, due to dynamic excitation of the base, is derived. Same procedure is repeated for the frame model with suspended mass. The characteristics of the suspended mass (mass and length of the rope) are chosen and experiments of the frame model due to several selected dynamic simulations are carried out. All the experiments are conducted for a frame model, without and with the suspended mass, attached to a seismic platform that simulates the harmonic function of the base displacement and selected historical seismic records. The dynamic response is monitored using an optical measuring system. Based on the comparison between experimentally obtained dynamic response of the frames without and with added suspended mass, it is noticed that the suspended mass is usually beneficial for reducing the oscillations. However, the negative effect of the suspended mass is observed in case of some excitation functions, so it is advised to precisely determine its characteristics, as well as add a damping element.