ESTIMATION SEISMIC RESPONSE OF SEISMIC ISOLATION LAYER USING AN ACCELEROMETER

Seismic Response Control Using Base Isolation Strategy

Earthquakes are one of the natural hazards that occur due to sudden violent movement of earth’s surface which releases energy and has destructive power in many parts of the world. The development of recent technologies for the control of seismic hazards catches the attention of structural engineers to make the structures seismically resistant. The seismic base isolation technique is a passive p...

Seismic Response Reduction of Structures using Smart Base Isolation System

In this study, control performance of a smart base isolation system consisting of a friction pendulum system (FPS) and a magnetorheological (MR) damper has been investigated. A fuzzy logic controller (FLC) is used to modulate the MR damper so as to minimize structural acceleration while maintaining acceptable base displacement levels. To this end, a multi-objective optimization scheme is used t...

Reproducibility of a triaxial seismic accelerometer (DynaPort).

PURPOSE To examine the reproducibility of a triaxial seismic accelerometer under controlled conditions and real-life conditions. METHODS Instrumental reproducibility was examined using a shaker device. The accelerometers (DynaPort MiniMod; McRoberts B.V., The Hague, The Netherlands) were shaken at four frequencies (0.8, 2.1, 3.6, and 4.6 Hz) in x- and y-directions. The magnitude of accelerati...

Design Principles of Seismic Isolation

In earthquake resistance design of structures, two general concepts have been used. The first is to increase the capacity of the structures to resist the earthquake load effects (mostly horizontal forces) or to increase the dynamic stiffness such as the seismic energy dissipation ability by adding damping systems (both devices and/or structural fuses). The second concept includes seismic isolat...

Seismic Gradiometry using Ambient Seismic Noise in an Anisotropic Earth