scholarly journals Proving Test on Seismic Reliability of Piping System with Energy Absorbing Supports. (Verification of Seismic Response Analysis Method of Piping System).

1998 ◽  
Vol 41 (2) ◽  
pp. 192-198 ◽  
Author(s):  
Kohei SUZUKI ◽  
Youichi SASAKI ◽  
Hiroshi ABE ◽  
Katsuhiko KURODA ◽  
Yoshio NAMITA ◽  
...  
Keyword(s):  
Seismic Response ◽  
Response Analysis ◽  
Piping System ◽  
Analysis Method ◽  
Seismic Response Analysis ◽  
Seismic Reliability ◽  
Energy Absorbing

Seismic response analysis of a piping system subjected to multiple support excitations in a base isolated NPP building

2015 ◽  
Vol 292 ◽  
pp. 283-295 ◽  
Author(s):  
Han-Bum Surh ◽  
Tae-Young Ryu ◽  
Jin-Sung Park ◽  
Eun-Woo Ahn ◽  
Chul-Sun Choi ◽  
...  
Keyword(s):  
Seismic Response ◽  
Response Analysis ◽  
Piping System ◽  
Seismic Response Analysis ◽  
Multiple Support

Seismic Fragility Evaluation of Interface Pipes in Seismically Isolated NPPs by Using Scale Model Test

2015 ◽  
Author(s):  
Daegi Hahm ◽  
Min-Kyu Kim ◽  
In-Kil Choi ◽  
Bub Gyu Jeon ◽  
Hyoung Suk Choi ◽  
...  
Keyword(s):  
Seismic Response ◽  
Nuclear Power ◽  
Seismic Isolation ◽  
Response Analysis ◽  
Seismic Events ◽  
Piping System ◽  
Seismic Response Analysis ◽  
Secondary Systems ◽  
Inelastic Seismic Response ◽  
Isolation Device

Seismic isolation system can be an effective alternative to protect the NPPs (Nuclear Power Plants) against to the strong seismic events. Therefore, some research activities to adopt the seismic isolation concept to the design of the next generation NPPs have been progressed for last few years in Korea. Nuclear structures, secondary systems and components must remain undamaged during and after the SSE (Safe Shutdown Earthquake) event. The seismic events will cause the high seismic response in the stiff structural systems and extremely high demands of deformation on the safety-related secondary systems like piping components. If seismic isolation devices are installed in nuclear power plant for seismic stability, safety against seismic load of power plant may be improved. But in some equipment, seismic risk may increase because displacement may become greater than before installation of seismic isolation device. Therefore, it is necessary to select the equipment in which seismic risk increases due to increase in displacement by the installation of seismic isolation device, and perform a research on seismic performance evaluation of equipment. In this study, one of the typical Korean NPPs assuming the application of seismic isolation devices, and one of the interface piping systems which introduced this NPP was used for seismic analysis. The numerical models include representations of seismic isolation devices. In order to validation of numerical piping system model and defining failure mode & limit states, quasi-static loading tests were conducted on the scale-modeled piping components before the analysis procedures. The fragility analysis was performed by using results of inelastic seismic response analysis. Inelastic seismic response analysis was carried out by using shell finite element model of piping system considering internal pressure. The implicit method was used for the direct integration time history analysis. Generally, PGA (Peak Ground Acceleration) was used for seismic intensity of fragility curve. However, in the case of the displacement sensitive system, lateral displacement could be an useful alternative measure for estimation of probability of failure. Thus in this paper, fragility curves were plotted based on maximum relative displacement.

scholarly journals Seismic Response Analysis of Shaft Tower Based on The Interaction of Soil-Well Bore-Shaft Tower

2021 ◽  
Vol 943 (1) ◽  
pp. 012024
Author(s):  
L T Han ◽  
Y P Su ◽  
J W Chen ◽  
N Ge
Keyword(s):  
Seismic Response ◽  
Response Analysis ◽  
Rigid Foundation ◽  
Well Bore ◽  
Analysis Method ◽  
Analysis Model ◽  
Seismic Response Analysis ◽  
Element Analysis ◽  
Finite Element Analysis Method ◽  
The Finite Element Analysis

Abstract To study the influence of soil-well bore-shaft tower interaction on the seismic response of the shaft tower. A numerical analysis model of rigid foundation (without considering the interaction of soil-well bore-shaft tower ) and II site considering soil-well bore-shaft tower interaction is established by the finite element analysis method. The mode period, tower layer displacement and inter-story displacement of shaft tower are analyzed. The results show that, compared with rigid foundation, considering the interaction of soil-well bore-shaft tower, the mode period of the system is prolonged, the tower layer displacement and inter-story displacement of the shaft tower is enlarged. In the engineering design of shaft tower, the influence of the soil-well bore-shaft tower interaction on the seismic response of the shaft tower cannot be ignored.

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