scholarly journals Seismic loss assessment of seismically isolated buildings designed by the procedures of ASCE/SEI 7-16

2021 ◽  
Author(s):  
Shoma Kitayama ◽  
Huseyin Cilsalar
Keyword(s):  
Seismic Isolation ◽  
Cost Effective ◽  
Loss Assessment ◽  
Displacement Capacity ◽  
Seismic Loss ◽  
Seismic Force ◽  
Seismically Isolated ◽  
Isolation Systems ◽  
Seismic Isolation Systems ◽  
Seismic Loss Assessment

AbstractThis paper investigates the seismic loss assessment of seismically isolated and non-isolated buildings with steel moment or braced frames, designed by the seismic design standard of ASCE/SEI 7-16. The seismic loss is calculated from the damage to structural and non-structural components, as well as the demolition and the collapse of buildings. This study demonstrates that the expected annual losses for seismically isolated buildings are half or less than half of those calculated for non-isolated buildings. These losses depend on the types of seismic isolation systems and seismic force resisting systems used. Among the cases of isolated buildings studied in this paper, the most cost-effective systems are found to be the buildings designed by minimum strength requirement in ASCE/SEI 7-16 and with isolators which have displacement capacity 1.5 times larger than the minimum required in ASCE/SEI 7-16, in terms of expected annual losses. This study also compares the results obtained from different approaches of selection and scaling of ground motions. The following research finds that when Incremental Dynamic Analysis approach with far-field ground motion set in FEMA P695 is used, the computed expected total annual losses become doubled from the Conditional Spectra approach.

Development of an Evaluation Method for Seismic Isolation Systems of Nuclear Power Facilities: Part 10 — Evaluation of Seismic Isolator Design

2014 ◽  
Author(s):  
Hiroyuki Asano ◽  
Tsutomu Hirotani ◽  
Takashi Nakayama ◽  
Takemi Norimono ◽  
Yuji Aikawa ◽  
...  
Keyword(s):  
Nuclear Power ◽  
Seismic Isolation ◽  
Power Plants ◽  
Evaluation Method ◽  
Large Diameter ◽  
Seismic Isolator ◽  
Long Duration ◽  
Seismically Isolated ◽  
Isolation Systems ◽  
Seismic Isolation Systems

This paper provides a part of series of “Development of an Evaluation Method for Seismic Isolation Systems of Nuclear Power Facilities”. This part shows an evaluation of seismic isolator design established in this project where several methods are newly developed. The major four accomplishments are as follows. One: establishment of design earthquake specially considered for seismically isolated nuclear power facilities. The design earthquakes are made to fit multiple target spectra with different damping factors considering a building, equipment and seismic isolators for more precise response analyses. Two: design and development of a high-performance seismic isolator. Against the large design earthquakes, a seismic isolator is newly developed which has a large diameter lead plug for more damping; the isolators were actually manufactured and tested. Three: seismic response analyses for seismically isolated nuclear power plants. Light water reactors are designed where the structural characteristics of the seismic isolation system is reflected. Four: evaluation of thermal effects on seismic isolators by a long-duration earthquake. Considering a long-duration earthquake, the heat generation phenomenon in the lead plug is analytically evaluated to ensure the lead plug’s damping performance. By introducing these accomplishments, the realistic design of a seismically isolated nuclear power plant is achieved.

scholarly journals Comparing Rubber Bearings and Eradi-Quake System for Seismic Isolation of Bridges

Materials ◽  
2020 ◽  
Vol 13 (22) ◽  
pp. 5247
Author(s):  
Chang Beck Cho ◽  
Young Jin Kim ◽  
Won Jong Chin ◽  
Jin-Young Lee
Keyword(s):  
Seismic Isolation ◽  
New Technology ◽  
Isolation System ◽  
Seismic Safety ◽  
Response Characteristics ◽  
Rubber Bearing ◽  
Seismic Force ◽  
Isolation Systems ◽  
Rubber Bearings ◽  
Seismic Isolation Systems

Seismic isolation systems have been used worldwide in bridge structures to reduce vibration and avoid collapse. The seismic isolator, damper, and Shock Transmission Unit (SUT) are generally adopted in the seismic design of bridges to improve their seismic safety with economic efficiency. There are several seismic isolation systems, such as Natural Rubber Bearing (NRB), Lead Rubber Bearing (LRB), and the Eradi-Quake System (EQS). EQS as a new technology is expected to effectively reduce both seismic force and displacement, but there is still some need to verify whether it might provide an economical and practical strategy for a bridge isolation system. Moreover, it is important to guarantee consistent performance of the isolators by quality control. A comparative evaluation of the basic properties of the available seismic isolators is thus necessary to achieve a balance between cost-effectiveness and the desired performance of the bridge subjected to extreme loading. Accordingly, in this study, the seismic response characteristics of the seismic isolation systems for bridges were investigated by conducting compressive test and compressive-shear test on NRB, LRB, and EQS.

Seismic Isolation: New Zealand Applications

1990 ◽  
Vol 6 (2) ◽  
pp. 203-222 ◽  
Author(s):  
G. R. McKay ◽  
H. E. Chapman ◽  
D. K. Kirkcaldie
Keyword(s):  
New Zealand ◽  
United States Of America ◽  
Seismic Isolation ◽  
Effective Means ◽  
Cost Effective ◽  
The United States ◽  
Isolation Systems ◽  
Seismic Isolation Systems ◽  
Earthquake Effects

Seismic isolation of structures has been applied in New Zealand since 1973. To date approximately 45 bridges, 3 large buildings and a few other structures have been protected with this technique. These include 40 bridges and 2 buildings designed by Works and Development Services Corporation (NZ) Ltd (WORKS). Numerous energy dissipating devices have been developed and tested by New Zealand researchers. Six of these designs have proved to be convenient and economical and have been incorporated in the seismic isolation systems of the structures built. Development work on seismic isolation devices is continuing in New Zealand and contact with specialists from other countries - in particular from Japan and the United States of America - is being maintained. Seismic isolation has been found to be a cost effective means of mitigating earthquake effects, particularly if the long term benefits of reduced seismic damage and disruption are taken into consideration.

SURVEY OF DWELLING BUILDINGS FOR SEISMIC LOSS ASSESSMENT AT URBAN SCALE: THE CASE STUDY OF 18 VILLAGES IN VAL D'AGRI, ITALY

2014 ◽  
Vol 13 (2) ◽  
pp. 471-486 ◽  
Author(s):  
Angelo Masi ◽  
Leonardo Chiauzzi ◽  
Carmelinda Samela ◽  
Luigi Tosco ◽  
Marco Vona
Keyword(s):  
Loss Assessment ◽  
Seismic Loss ◽  
Seismic Loss Assessment

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.

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