The present paper deals with the optimisation of a hybrid Tuned Mass Damper (TMD) in reducing the transient structural response due to impulse loading. In particular, a unit impulse excitation has been assumed, acting as base displacement, which is a situation that may occur in different real applications. The proposed hybrid Tuned Mass Damper is composed of a previously optimised passive TMD a...

This paper presents a simplified design procedure (SDP) for performance-based of low-rise new steel MRF buildings with nonlinear viscous dampers. The SDP uses an effective stiffness and equivalent damping multi degree-of-freedom (MDOF) model the building, which is established using linearized system (damping devices associated bracing). integrated process to achieve target performance objective...

Near-field pulse-type ground motions (NPGMs) are characterized by a high-energy pulse with large peak velocities and accelerations need further studies to confirm whether structures viscous dampers (VDs) still applicable effective for this type of motions. In article, the vibration reduction performance VDs under near-field earthquakes is investigated systematically. Displacement acceleration s...

In this paper a method is presented to identify the parameters of a structure exhibiting weak nonlinear behavior using vibration test data. The identification approach is based on an extension of a linear frequency domain method for the direct identification of incomplete system matrices to the nonlinear case. The basic identification equations are extended by additional stiffness and damping t...

A new optimization concept is introduced which involves the optimization of non-linear planar shear buildings by using gradients based on equivalent linear structures, instead of the traditional practice of calculating the gradients from the non-linear objective function. The optimization problem is formulated as an equivalent linear system of equations in which a target fundamental eigenfreque...

Earthquakes that occur in buildings can lead to collision force with the next building if initial gap between two is not sufficient for its free vibration responses. Collisions cause amplification of internal forces structural elements and on contact zone usually considered design so it damage collapse buildings. This study aime determine effect Soil-Structure Interaction dilatation structures ...

In order to study the influence of chamfered and rounded corners on vortex-induced vibration super-tall buildings, a series multi-degree-of-freedom (MDOF, in short) aeroelastic models were made, including chamfered-corner with chamfer ratios 0%, 2.5%, 5.0%, 7.5%, 12.5%, rounded-corner 15%, 17.5%. The crosswind displacement response each model was measured by laser meter wind tunnel. test result...

Hysteretic dampers have been widely used as effective passive installed at interstories since they are inexpensive compared with other types of dampers. It is well known that added stiffness hysteretic increases floor acceleration responses. However, for pulse-like ground motions sudden input and short duration.

This study establishes a short-time stochastic subspace identification (ST-SSI) framework to estimate bridge frequencies by processing the dynamic response of traversing vehicle. The formulation uses dimensionless description that simplifies vehicle-bridge interaction (VBI) problem and brings forward minimum number parameters required for identification. With aid analysis manages successfully a...