Analyses of Seismic Isolation Systems in Kyrgyzstan

2002 ◽  
Author(s):  
Tynymbek O. Ormonbekov ◽  
Ulugbek T. Begaliev
Keyword(s):  
Active Zone ◽  
Seismic Isolation ◽  
Seismic Protection ◽  
Kyrgyz Republic ◽  
Isolation Systems ◽  
Seismic Isolation Systems

The purpose of the present work is the analysis of existing methods of seismoisolation in the Kyrgyz Republic at which 95% of territory has seismically active zone with intensity 8, 9 and more. Also an opportunity of application of system seismic protection as rubber-metal bearings.

scholarly journals Análisis no lineal de la estructura del Hospital Darío Machuca Palacios del cantón La Troncal en Ecuador

2018 ◽  
Vol 3 (1) ◽  
pp. 292
Author(s):  
Francisco Xavier Calle Guaraca ◽  
Bernardo Andrés Feijoo Guevara ◽  
Ing. José Fernando Vásquez Calero, M.Sc
Keyword(s):  
Dynamic Analysis ◽  
Nonlinear Dynamic ◽  
Seismic Isolation ◽  
Nonlinear Dynamic Analysis ◽  
Seismic Protection ◽  
Isolation Systems ◽  
Seismic Isolation Systems

The hospital "Darío Machuca Palacios" is located in La Troncal (Cañar-Ecuador). In the nonlinear dynamic analysis of this hospital was determined inconsistencies in its design, such as non-compliance with maximum permissible drifts established by the Ecuadorian Construction Standard (NEC, as per its Spanish acronym), demonstrating vulnerability and possible collapse of the hospital. Considering that it is an essential building according to the NEC of seismic danger, it needs to be maintained in correct post-earthquake operation. For this reason the behavior of the structure with seismic isolation systems at their base was simulated, offering results that analyzed in depth could determine that this measure of seismic protection is adequate.Keywords: nonlinear dynamic analysis, essential building, seismic isolation systems.

Increasing the seismic resistance of operated buildings using special seismic protection methods

2021 ◽  
pp. 41-48
Author(s):  
Tatiana A. Belash ◽  
Elizaveta D. Erokhina
Keyword(s):  
Seismic Isolation ◽  
Computational Study ◽  
Active Regions ◽  
Seismic Protection ◽  
Seismic Resistance ◽  
Building Structures ◽  
Metal Supports ◽  
Isolation Systems ◽  
Seismic Isolation Systems

The change in the level of seismicity of buildings and structures occurs as a result of updating the maps of general seismic zoning. Ensuring the seismic resistance of buildings and structures is a factor that must be taken into account, especially during construction in seismically active regions. Nowadays, one of the main approaches to increasing seismic resistance is the use of various seismic isolation systems. It is not always profitable and rational to increase the seismic resistance of building structures or foundations for equipment by simply increasing the strength. A classification of seismic reinforcement systems is given, among which the most sparing are special methods of seismic protection in the form of seismic isolation. Practical examples of the use of seismic isolation systems to improve the seismic resistance of existing buildings are given. A computational study was carried out, the result of which showed the effectiveness of using rubber-metal supports for hanging the seismic resistance of buildings.

scholarly journals Some problems vibration and protection of buiding and structures using blocks

2021 ◽  
Vol 79 (1) ◽  
pp. 177-186
Author(s):  
A.F. Bulat ◽  
◽  
A.S. Kobets ◽  
V. I. Dyrda ◽  
V.A. Lapin ◽  
...  
Keyword(s):  
Seismic Isolation ◽  
Vibration Isolation ◽  
Residential Buildings ◽  
The United States ◽  
Seismic Protection ◽  
Eurocode 8 ◽  
Natural Vibration Frequency ◽  
Vibration Protection ◽  
Isolation Systems ◽  
Seismic Isolation Systems

The basic concept of vibration and seismic insulation of buildings and structures based on the use of rubber seismic blocks (RSB) is considered. The concept of seismic isolation of structures is very relevant. In Japan, New Zealand, France, Greece, England, the United States and a number of other countries, it has been successfully used to protect such important structures as nuclear power plants, schools, bridges, museums, administrative and residential buildings from earthquakes. In Ukraine, the concept developed in two ways: the development of seismic isolation blocks for earthquake protection of residential buildings; development of vibration isolation blocks for vibration protection of heavy equipment (weight up to 300 tons, used in Russia, Ukraine) and residential buildings. For the practical application of building seismic isolation systems by the N. S. Geotechnical Mechanics Institute. Experimental studies were carried out to substantiate the RSB parameters, their designs were patented, design documentation was developed and experimental samples of three types of rubber-metal seismic protection blocks with a diameter of 400 mm and 500 mm and a total height of the rubber layer: 2 120 120 mm, 2х70 mm and 2х50 mm were made. The results of the calculation of a rubber-metal seismic support used as an element of vibration-seismic protection of multi-storey residential buildings are presented. The calculation results obtained by approximate analytical methods are compared with experimental data for samples of seismic supports. The design of a pile with vibration-insulating rubber supports is considered. The developed and tested RSB structures were used for vibration protection against metro trains and vehicles of residential buildings in Kiev: a 10-section 10-storey residential building on Kikvidze Street, three 27-storey buildings on Obolonsky Avenue and a residential complex of three houses in Lviv. Vibration and seismic isolation with the help of RSB provides the natural vibration frequency of the building in the horizontal plane of less than 1 Hz, which meets the requirements of the DBN and Eurocode 8 for the design of the building seismic isolation systems.

Development of an Evaluation Method for Seismic Isolation Systems of Nuclear Power Facilities: Part 6 — Scaled Tests to Obtain Basic Characteristics of Lead Rubber Bearing

2014 ◽  
Author(s):  
Tsutomu Hirotani ◽  
Ryota Takahama ◽  
Masaki Yukawa ◽  
Hiroshi Hibino ◽  
Yuji Aikawa ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Seismic Isolation ◽  
Evaluation Method ◽  
Loading Test ◽  
Rubber Bearing ◽  
Lead Rubber Bearing ◽  
Basic Characteristics ◽  
Isolation Systems ◽  
Seismic Isolation Systems ◽  
Hysteresis Characteristics

This paper provides a series comprising the “Development of Evaluation Method for Seismic Isolation Systems of Nuclear Power Facilities”. Part 6 presents scaled tests for Lead Rubber Bearing (LRB) newly developed for this project. Following tests are performed to obtain the basic characteristics of LRB,. (1) Horizontal and Vertical Simultaneous Loading Test: LRBs with diameter of 250mm are tested dynamically under simultaneous axial and lateral loading. The hysteresis characteristics is not changed under compressive load although it is changed under tensile load. (2) Basic Break Test: LRBs with a diameter of 800mm are tested statically under various combinations of axial and lateral forces. The hysteresis characteristics model of LRB is determined by this test. It is confirmed that the breaking strain of LRB under compression load exceeds 450%. (3) Horizontal Hardening and Vertical Softening Test: For LRBs with a diameter of 1200 mm, 75% scale of actual LRB are tested statically for horizontal hardening and vertical softening regions. It is confirmed that the hysteresis model which is developed by smaller LRBs is applicable to these large scale models.

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