In this paper an innovative and simple Operational Modal Analysis (OMA) method for structural dynamic identification is proposed. It combines the recently introduced Time Domain–Analytical Signal Method (TD–ASM) with Genetic Algorithm (GA). Specifically, TD–ASM firstly employed to estimate a subspace of candidate modal parameters, then GA used identify parameters minimizing fitness value return...

The conventional optimal calibration of a TLCD for suppressing structural vibration is based on the classic 2-degrees-of-freedom (2-DOF) model in terms one specific mode (usually resonant mode). For flexible multi-degrees-of-freedom (MDOF) structures, this implies that background flexibility contribution from other non-resonant modes omitted, resulting an unbalance frequency response structure-...

A preliminary study of a semi-active control system with pneumatic devices, aimed to improve the response of multi-degree of freedom structures to earthquakes, is presented. The devices are attached at various levels of a structural frame. The aim of the design is to find a combination of forces that are produced by the devices, in order to obtain optimal structural response. The mechanical res...

The development and applications of a supplemental viscous damping device with active capacity are described. The system of the dampers de ned as active viscous damping system (AVDS) is presented herein. Structural control principles de ned here as active control theory (ACT) are used to obtain the control forces at each time step during an excitation. Control of the damping forces is possible ...

This paper focuses on understanding and assessing the effect of hysteretic behavior (i.e., bilinear, peakoriented and pinching) in the evaluation of peak deformation demands and their distribution over the height for regular frame structures over a wide range of stories (from 3 to 18) and fundamental periods (from 0.3 s. to 3.6 s.). The ground motions used are those with frequency content chara...

Tuned mass damper (TMD) have been studied and installed in structures extensively to protect the structures against lateral loads. Multiple tuned mass dampers (MTMDs) which include a number of TMDs with different parameters have been proposed for improving the performance of single TMDs. When the structural system is considered as multiple degrees of freedom (MDOF) and implemented with MTMDs, t...