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

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

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

scholarly journals Development of seismic protection system for design extension conditions

2018 ◽  
Vol 4 (1) ◽  
pp. 43-50
Author(s):  
Ilnar I. Galiev ◽  
Alexey N. Chernyaev ◽  
Stanislav V. Bibik
Keyword(s):  
Radio Channel ◽  
Operation Mode ◽  
Optimal Number ◽  
Protection System ◽  
Seismic Protection ◽  
Seismic Stations ◽  
Emergency Situations ◽  
Seismic Sensors ◽  
Optimal Distance ◽  
Design Earthquake

Development of seismic protection system for design extension conditions (SPSDEC) is suggested for enhancing safety of operation of NPP located on the territories with unfavorable seismic conditions. The idea of the system consists of the creation of a network of seismic stations arranged at a certain distance from the NPP and equipped with data transmission system. In case of detection by seismic sensors of movements of the ground with magnitude of vibrations exceeding a certain preset value, seismic stations transmit over radio-channel a signal indicating exceedance of the setting before the seismic wave reaches the NPP. This allows initiating transition of the reactor to subcritical operation mode prior to the beginning of destruction of equipment and reactor building. Ensuring reliable protected communication is achieved by simultaneous use of three radio-channels arranged in accordance with TETRA, WiMAx and LTE standards, as well as by the application of appropriate cryptography, authentication and data protection methods for preventing data corruption. Analysis was performed for determining optimal distance between seismic stations and the NPP and optimal number of these stations was determined for the following two options of arrangement of seismic stations: radial arrangement surrounding the NPP and arrangement along the direction towards the place with the highest probability of earthquake incipience. Layout was suggested of multilevel majoritarian data processing for excluding false triggering of the system. Conclusions were formulated on the enhancement of safety of NPP operation and significant reduction of probability of emergency situations due to the generation of anticipatory signals to reactor shutdown systems in case of earthquakes with intensity exceeding maximum design earthquake.

The Behavior of Rion – Antirion Bridge Seismic Protection System During The Earthquake of “Achaia-Ilia” on June 8, 2008

2010 ◽  
Vol 97 (28) ◽  
pp. 71-78 ◽  
Author(s):  
Samuele Infanti ◽  
Panayotis Papanikolas ◽  
Aris Stathopoulos-Vlamis
Keyword(s):  
Protection System ◽  
Seismic Protection
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