Abstract In earlier days, the only way to resist lateral loads was increase strength of structure obtained by making larger cross sections and massive buildings. Structural control is one solutions important topics in both points view security comfort recent years. To reduce effect seismic energy, structural forms used outrigger. years, supplementary devices are installed into outrigger so that...

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...

This article presents a theoretical study aimed at improving effectiveness of the isolation system of a building by adding magneto-rheological (MR) dampers that act in parallel to the rubber bearings (RB). To this end, the building itself is modeled with uni-axial elements that consider axial, shear and flexural deformations. Nonlinear elements that include RBs and MR dampers, whose response is...

In this paper, in addition to introduce a hybrid structural system contained local isolators and dampers, its behavior and functional capabilities were studied on a conventional structure. For this purpose, an RC frame building with six-story was designed based on valid codes and then, in four cases based on the number of spans, it was split into two separate adjacent frames. Base isolation was...

Abstract Seismic-induced pounding between adjacent buildings may have serious consequences, ranging from minor damage up to total collapse. Therefore, researchers try mitigate the problem using different methods, such as coupling with stiff beams, connecting them viscoelastic links, and installing damping devices in each building individually. In current paper, effect of linear nonlinear fluid ...

In earthquake engineering, damping devices are commonly used to enhance the energy dissipation capacity of structures and help control structural dynamic response under seismic excitation. design building with integration dampers, section sizes components amount reinforcement may be reduced so that performance structure remains comparable a conventional without dampers actions. Understandably s...

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...

This study proposes a capacity spectrum Method (CSM)-based procedure to estimate the maximum seismic performance of steel buildings passively controlled with bilinear oil dampers. In proposed CSM, response building was estimated, in acceleration-displacement spectrum, as intersection between curve and damping-adjusted demand curves, using equivalent linearization method. The damping ratio deter...

This paper focuses on parameter identification of Fluid Viscous Dampers, comparing different existing literature models, with the aim to recognize ability of these models to match experimental loops under different test specimens. Identification scheme is developed evaluating the experimental and the analytical values of the forces experienced by the device under investigation. The experimental...