Shake table testing on restoring capability of double concave friction pendulum seismic isolation systems

2017 ◽  
Vol 46 (14) ◽  
pp. 2337-2353 ◽  
Author(s):  
Felice Carlo Ponzo ◽  
Antonio Di Cesare ◽  
Gianmarco Leccese ◽  
Domenico Nigro
Keyword(s):  
Seismic Isolation ◽  
Shake Table ◽  
Shake Table Testing ◽  
Isolation Systems ◽  
Seismic Isolation Systems ◽  
Friction Pendulum

scholarly journals Evaluating the Accuracy of an Equivalent Linear Model in Predicting Peak Displacement of Seismic Isolation Systems using Single Friction Pendulum Bearings

2021 ◽  
Author(s):  
Thanh-Truc Nguyen ◽  
Nhan Dinh Dao
Keyword(s):  
Linear Model ◽  
Seismic Isolation ◽  
Peak Displacement ◽  
Equivalent Linear ◽  
Linear And Nonlinear ◽  
Isolation Systems ◽  
Seismic Isolation Systems ◽  
Friction Pendulum ◽  
Equivalent Linear Model ◽  
Motion Types

This study evaluates the accuracy of an equivalent linear model in predicting peak nonlinear time-history displacement of seismic isolation systems with single friction pendulum bearings. To perform this evaluation, dynamic response of numerical models of 120 isolation systems subjected to 390 strong earthquake ground motions, including motions with pulse and motions without pulse, was analyzed and statistically processed. The results show that the equivalent linear model can partly predict the peak displacement of its counterpart nonlinear model. However, the equivalent model can also underestimate or overestimate the peak displacement. On average sense, the equivalent linear model underestimates small peak displacement and overestimates large peak displacement. It is also observed that the relationship between linear and nonlinear peak displacements depends on ground motion types. Based on the analysis data, equations representing relationship between linear and nonlinear peak displacements at different reliable levels for different ground motion types were proposed. These equations can be used in practice.

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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