Cylindrical Frictional Damper (CFD) is a new revolutionary frictional based mechanical damper. Unlike the other types of frictional dampers, CFDs do not utilize bolts to produce friction between contact surfaces. These dampers consist of two main parts, the inner shaft and the external cylinder. These two parts are assembled such that one is shrink-fitted inside the other. In this investigation...

Base isolators and fluid viscous dampers are viable protective devices that have been commonly considered in the seismic protection of civil engineering structures. However, optimal design these remains a tedious iterative undertaking due to uncertainty ground motions, nonlinear behavior structure, its change dynamic characteristics (i.e., effective stiffness damping ratio) under each new desig...

Magnetorheological (MR) dampers have a virtue over conventional dampers, where their damping properties can be adjusted using magnetic field. However, MR been barely implemented in small vibratory systems, which the modal mass and stiffness are relatively small. This is due to two major reasons, namely its high parasitic force big moving mass. When such an damper installed system, system‘s defa...

Benefitting from economic development and technological progress, long-span suspension bridges, with their superior span capacity good economy, have been built in large numbers recent decades. However, the excessive cumulative longitudinal displacement at girder ends process of bridge operation leads to degradation of, fatigue damage to, connecting components. This study aims solve problem an e...

The connection of two building structures with dampers is one of the effective vibration control systems. In this vibration control system, both buildings have to possess different vibration properties in order to provide a higher vibration reduction performance. In addition to such condition of different vibration properties of both buildings, the connecting dampers also play an important role...

In order to improve the energy dissipation of the masonry infilled frame structure while decreasing the stiffening and strengthening effects of the infill panels, a new dry stacked panel (DSP) semi-interlocking masonry (SIM) infill panel has been developed. In this paper, the material properties of DSP and a traditional unreinforced masonry (URM) panel have been evaluated experimentally. A seri...

This paper investigates the effectiveness of two adaptive control strategies for modulating control force of variable friction dampers (VFDs) that are employed as semi-active devices in combination with laminated rubber bearings for seismic protection of buildings. The first controller developed in this study is an adaptive fuzzy neural controller (AFNC). It consists of a direct fuzzy controlle...