One of the most successful means of protecting structures against severe seismic events is base isolation. However, optimal design of base isolation systems depends on the magnitude of the design level earthquake that is considered. The features of an isolation system designed for an El Centro-type earthquake typically will not be optimal for a Northridge-type earthquake and vice versa. To be e...

As a rule, public buildings should have higher safety level compared to residential ones. Hence, using base isolation systems is an effective and widely known way for improving dynamic response of such buildings. The idea of base isolation was known hundreds years ago, however practical implementation of base isolators started in the last few decades. The main advantage of a base isolation syst...

Granular dampers are passive devices used to attenuate mechanical vibrations. The most common configuration consists in an enclosure, partiallyfilled with particles, attached the vibrating structure that needs be damped. energy is dissipated due inelastic collisions and friction between grains inner walls of container as vibrates. As a result collisions, response system often results chaotic mo...

This study demonstrates that the robustness of friction dampers can be enhanced by using positive velocity dependence kinetic force. First, we show coefficient reduced under extremely low sliding conditions oleyl acid phosphate (OLAP) as an additive to lubricant on surfaces between bronze-filled polytetrafluoroethylene (PTFE) and steel. Next, based results numerical simulations, use a surface w...

Glass curtain walls are used in modern buildings as envelopes for wide surfaces due to a multitude of aspects. In glass curtain walls, tensile brittle panels are connected through mechanical or adhesive joints with steel frameworks or aluminum bracing systems, and due to the interaction of several structural components, the behaviour of the so assembled system is complex to predict, especially ...

Previously published work on applied impact damping typically relates to SDOF models or simple MDOF models such as the classical cantilever beam. Structural models often require an extremely large number of DOF with mode shapes that are generally very complex. Dynamics simulation of these typically becomes both complicated and time consuming. The nonlinear behavior of impact dampers further com...

Rollover is one of the most dangerous events in driving Vehicles, specially the Sport Utility ones. This maneuver is the main reason for the majority of human and financial loss in transportation systems. The upcoming paper outlines the details as well as the plus points of a Fuzzy Logic Controller which is designed and simulated to reduce the rollover propensity of Vehicles, specially the ones...

Abstract—This paper focuses on parametric analysis of reinforced concrete structures equipped with supplemental damping braces. Practitioners still luck sufficient data for current design of damper added structures and often reduce the real model to a pure damper braced structure even if this assumption is neither realistic nor conservative. In the present study, the damping brace is modelled a...

Diante da crescente pressão social por uma postura ambientalmente sustentável, empresas e esta-belecimentos vêm incorporando em suas estratégias de mercado a adoção ações práticas vol-tadas para conservação ambiental. Neste contexto, torna-se necessária alguma sinalização que permita aos consumidores diferenciar os produtos resultantes processos sus-tentáveis seus substitutos, o é feito meio ce...