11.13: Hybrid seismic protection system: Buckling restrained brace of nano-micro composite magneto rheological damper

ce/papers ◽  
2017 ◽  
Vol 1 (2-3) ◽  
pp. 2936-2945 ◽  
Author(s):  
Cristian Vulcu ◽  
Dan Dubină ◽  
Nicolae Popa ◽  
Ladislau Vekas ◽  
Gheorghe Ghiţă ◽  
...  
Keyword(s):  
Protection System ◽  
Seismic Protection ◽  
Buckling Restrained Brace ◽  
Magneto Rheological

scholarly journals Development of seismic protection system for design extension conditions

2017 ◽  
Vol 2017 (4) ◽  
pp. 94-105
Author(s):  
Ilnar Ildarovich Galiev ◽  
Alexey Nikolaevich Chernyaev ◽  
Stanislav Vyacheslavovich Bibik
Keyword(s):  
Protection System ◽  
Seismic Protection

scholarly journals Numerical Model of a Hybrid Damping System Composed of a Buckling Restrained Brace with a Magneto Rheological Damper

2016 ◽  
Vol 12 (1) ◽  
pp. 13-22 ◽  
Author(s):  
Norin Filip-Vacarescu ◽  
Cristian Vulcu ◽  
Dan Dubina
Keyword(s):  
Dissipative System ◽  
Control Unit ◽  
Active System ◽  
Seismic Engineering ◽  
Buckling Restrained Brace ◽  
Fluid Damper ◽  
Magneto Rheological ◽  
Hybrid Damper ◽  
Reference Parameters ◽  
Mr Fluid Damper

Abstract This paper discusses the concept of a hybrid damper made from a combination of two dissipative devices. A passive hysteretic device like steel Buckling Restrained Brace (BRB) can be combined with a magneto-rheological (MR) Fluid Damper in order to obtain a hybrid dissipative system. This system can work either as a semi-active system, if the control unit is available, or as a passive system, tuned for working according to performance based seismic engineering (PBSE) scale of reference parameters (i.e. interstory drift).

Software Program for Two Levers Damper Configurations Used for Anti-Seismic Protection of the Buildings during Seism

2020 ◽  
Vol 896 ◽  
pp. 347-354
Author(s):  
Adriana Ionescu ◽  
Mihai Negru ◽  
Cristian Oliviu Burada ◽  
Ramona Pinţoi
Keyword(s):  
Mathematical Model ◽  
Axial Force ◽  
Protection System ◽  
Seismic Protection ◽  
Amplification Coefficient ◽  
Geometrical Parameters ◽  
Damping Force ◽  
Software Program ◽  
Seismic Damping

For a building equipped with anti-seismic devices, the value of the damping force of the dampers positioned at the superstructure is very important for an efficient anti-seismic damping and therefore an optimization of the seismic protection system with dampers is required. There are several configurations for placing the dampers that amplify the displacement and the damper axial force. This paper presents a computational mathematical model made for determining the coefficients of displacement multiplication and the damping force multiplication for two special positioning configurations of the antiseismic dampers using levers. Based on this model, a software program was created that allows to choose the geometrical parameters of two configurations of dampers placement having as criterion of choice the value of the amplification coefficient of the dampers displacement or the damper axial force.

Hybrid Base Isolation System with Friction Sliders and Viscous Dampers in Parallel: Comparative Dynamic Nonlinear Analysis with Traditional Fixed Base Structure

2012 ◽  
Vol 594-597 ◽  
pp. 1771-1782 ◽  
Author(s):  
Donato Cancellara ◽  
Fabio de Angelis
Keyword(s):  
Nonlinear Analysis ◽  
Base Isolation ◽  
Protection System ◽  
Seismic Protection ◽  
Viscous Dampers ◽  
Isolation System ◽  
Fixed Base ◽  
Base Isolation System ◽  
Dynamic Nonlinear Analysis ◽  
Base Structure

In the present paper we have analyzed a multi-storey reinforced concrete (RC) building in presence of a hybrid seismic protection system for highlighting the limits of the conventional fixed base seismic design of structures. This hybrid seismic protection system is a passive structural control system that combines the Base Isolation System (BIS) and the Passive Supplemental Damping (PSD). The Viscous Dampers (VS) and Friction Sliders (FS) are the devices adopted in parallel for realizing the innovative base isolation system. The fixed base structure and the base isolated structure have been designed and verified according to the European seismic code EC8 and the European code for the design of concrete structures EC2. A three-dimensional dynamic nonlinear analysis for a base isolated structure has been performed adopting recorded accelerograms for the defined bi-directional ground motions according to the conditions imposed by EC8. The seismic isolation is a promising alternative for the earthquake resistant design of buildings and its peculiarity is that the base isolated buildings are designed such that the superstructure remains elastic and the nonlinearities are localized at the isolation level. In this paper a comparative analysis is presented between the base isolated structure, with the viscous dampers in parallel with friction sliders, and the traditional fixed-base structure.

Optimal design of the seismic protection system for isolated bridges

2014 ◽  
Vol 7 (6) ◽  
pp. 969-999 ◽  
Author(s):  
Daniele Losanno ◽  
Mariacristina Spizzuoco ◽  
Giorgio Serino
Keyword(s):  
Optimal Design ◽  
Protection System ◽  
Seismic Protection ◽  
Isolated Bridges
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