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 s...

Abstract Ferrofluids are a type of nanometer-scale functional material with fluidity and superparamagnetism. They composed ferromagnetic particles, surfactants, base liquids. The main characteristics ferrofluids include magnetization, the magnetoviscous effect, levitation characteristics. There many mature commercial ferrofluid damping applications based on these that widely used in numerous fi...

The aim of this study is to compare the seismic response reinforced concrete (RC) symmetric buildings, with a varied number stories, strengthening three types passive energy dissipation systems, as tuned mass dampers, viscous and friction dampers. paper presents an overview design optimization object minimizing certain functions: (i) maximum displacement at top structures, (ii) base shear loads...

This paper presents sample control system designs for the three-dimensional benchmark structural control problem for seismically excited highway bridge. Three types of sample control systems, namely nonlinear viscous dampers, ideal hydraulic actuators and magnetorheological (MR) fluid dampers, are designed and presented for comparison by participants in the study. For each of the three sample c...

A novel energy-dissipation system for frame-core tube structure equipped with damped outriggers is studied experimentally. A steel frame-core tube structure model is designed and manufactured, in which viscous dampers are inserted vertically between the outrigger and fame columns to make full use of motion discrepancy of these two components. Shaking table tests of the building with damped or f...

Building structures are vulnerable to the shocks caused by earthquakes. Buildings that have been destroyed an earthquake very detrimental in terms of material loss and mental trauma. However, technological developments now enable us anticipate from earthquakes minimize losses. One technologies has used, is currently being further developed, a damping device fitted building structure. There vari...

Magnetorheological dampers, or as they are more commonly called, MR dampers, are being developed for a wide variety of applications where controllable damping is desired. These applications include dampers for automobiles, heavy trucks, bicycles, prosthetic limbs, gun recoil systems, and possibly others. This paper first introduces MR technology through a discussion of MR fluids and then by giv...

Real-time hybrid simulation (RTHS) is a testing method by which structural system divided into analytical and experimental substructures. This paper proposes methodology to conduct RTHS for structures that use passive nonlinear viscous dampers (NLVDs), some of are physically tested in the substructure others via online model updating (OMU). The proposed uses response modelled NLVD improve predi...

Semi-active dampers utilizing various working principles have been developed for a variety of vehicles. These semi-active dampers have been designed to resolve the ride and handling compromise associated with conventional passive dampers, and increase vehicle stability. This thesis briefly reviews existing semi-active damper designs, including but not limited to MR dampers, before presenting tw...