Vibration Reduction Performance of Structures with Viscous Dampers under Near-Field Earthquakes

Near-field pulse-type ground motions (NPGMs) are characterized by a high-energy pulse with large peak velocities and accelerations need further studies to confirm whether structures viscous dampers (VDs) still applicable effective for this type of motions. In article, the vibration reduction performance VDs under near-field earthquakes is investigated systematically. Displacement acceleration spectra developed single-degree-of-freedom (SDOF) structure without VDs, while these influence factors, such as nonlinear characteristic structure, damper supports’ flexibility, parameters, considered. Additionally, frequency domain characteristics NPGM energy distribution multidegree-of-freedom (MDOF) discussed reveal action mechanism on structure. It shown that shows remarkable seismic effect near-fault earthquake, maximum interstorey drift decreased from 0.086 0.037 when equipped VDs. However, may be difficult completely dissipate generated earthquake high period in short time, which can cause damaged or even collapsed moment.