Seismic response of pile-raft-clay system subjected to a long-duration earthquake: centrifuge test and finite element analysis

2017 ◽  
Vol 92 ◽  
pp. 488-502 ◽  
Author(s):  
Lei Zhang ◽  
Siang Huat Goh ◽  
Huabei Liu
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Seismic Response ◽  
Centrifuge Test ◽  
Element Analysis ◽  
Long Duration ◽  
Clay System

Finite element analysis of the seismic response of ancient columns

2019 ◽  
Vol 48 (13) ◽  
pp. 1432-1450 ◽  
Author(s):  
Konstantinos Papadopoulos ◽  
Elizabeth Vintzileou ◽  
Ioannis N. Psycharis
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Seismic Response ◽  
Element Analysis

Simplified Seismic Response Analysis Method Using Reduced Model of Piping System

2018 ◽  
Author(s):  
Michiya Sakai ◽  
Ryuya Shimazu ◽  
Shinichi Matsuura ◽  
Ichiro Tamura
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Seismic Response ◽  
Degrees Of Freedom ◽  
Response Analysis ◽  
Piping System ◽  
Element Analysis ◽  
Mass System ◽  
Piping Systems ◽  
Low Degrees

In the seismic response analysis of piping systems, finite element analysis is performed with analysis method guidelines [1]–[4] established based on benchmark analysis. However, since it takes a great deal of effort to carry out finite element analysis, a simplified method to analyze the seismic response of complex piping systems is required. In this research, we propose a method to reduce an equivalent spring-mass system model with low degrees of freedom, which can take into account the main mode of the complicated piping system. Simplified seismic evaluation is carried out using this spring mass system model with low degrees of freedom, and the accuracy of response evaluation is confirmed by comparison with finite element analysis.

Using Finite Element Analysis to Evaluate Countermeasures to Bone Demineralization During Long Duration Space Flight

1999 ◽  
Author(s):  
Benjamin M. Murphy ◽  
Linda C. Shackelford ◽  
Beth A. Todd ◽  
James F. Cuttino
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Space Flight ◽  
Weight Bearing ◽  
High Stress ◽  
Element Model ◽  
Magnetic Resonance Images ◽  
Element Analysis ◽  
Bone Demineralization ◽  
Long Duration

Abstract During long duration space flight, astronauts must exercise to prevent bone demineralization. Exercises are used as countermeasures to the bone mineral loss. The effectiveness of the countermeasures is closely related to the mechanical stress developed during the exercises. A finite element model of the human femur was developed to determine the stress distribution during weight bearing. The model was developed using serial, transverse magnetic resonance images. The finite element analysis performed on the femur model showed an area of high stress in the femoral neck of approximately 1,200 psi. The highest stress seen in the model was approximately 2,000 psi. This information will then be used to evaluate the proposed exercises to be used as countermeasures.

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