External dampers and cross-ties are commonly used to control vibrations of stay cables on cable-stayed bridges. While dampers contribute directly to the structural damping of the attached cables, cross-ties mainly help to increase the stiffness of the connected cable system. The idea of incorporating cross-ties with dampers has also been attempted in a few recent applications to benefit from th...

A stochastic change detection methodology for reliable monitoring complex nonlinear dynamic systems is proposed. For a semi-active magneto-rheological (MR) damper, the non-parametric, data-driven restoring force method was used to identify the nonlinear dynamic damping device. Both supervised and unsupervised statistical pattern recognition techniques were used to detect the changes in the phys...

Near field earthquakes have imposed major damage to buildings in the past years. In some cases, the intensity of such damage is too considerable to be disregarded. The most effective way to improve seismic performance of buildings is applying a seismic control technique. The cylindrical friction damper is one of these methods, which has become popular for its desirable performance in the energy...

The efficacy of dampers in providing seismic protection has been validated by the excellent performance of buildings fitted with dampers in the past earthquakes. However, previous studies have not accounted for the limit states of dampers. Recently, a multi-year research project was completed that investigated the seismic performance of building with dampers subject to large earthquakes. It was...

In this paper, the seismic responses control characteristics of Mega-structure, Mega-sub Controlled Structure System (MSCSS) without dampers and MSCSS inserted friction dampers are investigated respectively under rare earthquake by using the elastic-plastic time history analysis method. The distribution of plastic hinges and different control efficiency of these structures under rare earthquake...

Since the appearance of first modern multistories buildings, besides demand ensuring bearing capacity, one urgent problems facing engineer is to do how design structure ensure requirements normal use such as displacement, motion acceleration within permissible limits. There exist many methods reduce these response under lateral load. Among these, using fluid viscous damper (FVD) most applied eq...

Effectiveness of viscous damper on vibrations control full -height lattice tower under wave and wind excitations in time-domain

In this paper, a new control strategy is developed to improve comfort and roadholding of a ground vehicle equipped with an industrial damper. This damper can be controlled by means of a small servomechanism which adjusts the damping rate. The main controller is a linear parameter varying (LPV ) static state-feedback controller synthesized in the H∞/LPV framework to compute the required damping ...

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...