Abstract Nonlinear energy sink (NES) can passively absorb broadband from primary oscillators. Proper multiple NESs connected in parallel exhibit superior performance to single-degree-of-freedom (SDOF) NESs. In this work, a linear coupling spring is installed between two so as expand the application scope of such vibration absorbers. The absorption and parallel-coupled system response induced by...

Abstract The aim of the contribution is creating of SDOF and simple MDOF models with included complex information of civil structures for dynamic analyses. The dynamic parameters of models are obtained as inverse problem solution. The inverse problem is defined as an optimization problem. The objective is to minimize the error index between measured response of the real structure and calculated...

A significant amount of research in the last few years has greatly advanced the field of structural control through the use of smart materials. Smart materials have the ability to change shape, stiffuess, natural frequency, damping and other mechanical characteristics in response to environmental condition changes. One of the new class of materials with promising applications in structural and ...

In this paper we develop the principles of time-delayed control design for the active control of structures in which the presence of large time delays in the control loop may make it difficult for their effects to be easily eliminated and/or compensated. A control design strategy is proposed that is different from what has been generally accepted hereto; it calls for taking advantage of these l...

Results of damage prediction in buildings can be used as a useful tool for managing and decreasing seismic risk of earthquakes. In this study, damage spectrum and C4.5 decision tree algorithm were utilized for damage prediction in steel buildings during earthquakes. In order to prepare the damage spectrum, steel buildings were modeled as a single-degree-of-freedom (SDOF) system and time-history...

The paper examines the possibility of using a nonlinear Quasi-Zero-Stiffness (QZS) spring in vehicle suspension. response Single Degree Freedom (SDOF) model to harmonic base excitations is obtained which may be unstable and unbounded depending on excitation level damping ratio. This followed by obtaining SDOF with an amplitude that varying according road profile spectrum. Such dependency freque...

Although vibration monitoring is a popular method to monitor and assess dynamic structures, quantification of linearity or nonlinearity of the dynamic responses remains a challenging problem. We investigate the delay vector variance (DVV) method in this regard in a comprehensive manner to establish the degree to which a change in signal nonlinearity can be related to system nonlinearity and how...

A new method of robustness evaluation is proposed for an elastoplastic base-isolated high-rise building considering simultaneous uncertainties of structural parameters. Since it is difficult to evaluate the robustness of elastoplastic structures due to heavy computational load on the time-history response analysis including elastoplastic response, a double impulse input is used to provide a clo...

Semi-active control systems are becoming more popular because they offer both the reliability of passive systems and the versatility of active control systems without imposing heavy power demands. In particular, it has been found that magnetorheological (MR) fluids can be designed to be very effective vibration control actuators, which use MR fluids to produce controllable damping force. The ob...

The main characteristics of the numerical methods for dynamic response analysis of single degree of freedom (SDOF) system in both frequency-domain and time-domain are briefly reviewed in this paper. Based on the uniform recursive formula, four methods (Central difference method, Newmark’s method, Ztransform method and Duhamel’s step integral method) are systematically studied. The advantages, d...