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Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force

This paper presents an evaluation of a curved spring element that may be utilized in a developed variable stiffness bracing (VSB) system to confer the variable stiffness characteristic of the system.VSB system is established to protect the structure against dynamic loads induced by earthquake, wind...

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Main Authors: Fateh, Amir, Hejazi, Farzad, Jaafar, Mohd Saleh, Abd. Karim, Izian
Format: Article
Language:English
Published: Elsevier 2016
Online Access:http://psasir.upm.edu.my/id/eprint/16343/1/Numerical%20and%20experimental%20evaluation%20of%20a%20developed%20nonlinear%20curved%20spring%20element%20under%20compression%20force.pdf
http://psasir.upm.edu.my/id/eprint/16343/
http://www.sciencedirect.com/science/article/pii/S0143974X15301231
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spelling my.upm.eprints.163432016-06-08T01:43:53Z http://psasir.upm.edu.my/id/eprint/16343/ Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force Fateh, Amir Hejazi, Farzad Jaafar, Mohd Saleh Abd. Karim, Izian This paper presents an evaluation of a curved spring element that may be utilized in a developed variable stiffness bracing (VSB) system to confer the variable stiffness characteristic of the system.VSB system is established to protect the structure against dynamic loads induced by earthquake, wind and etc. To obtain the curved shape of the spring, mathematical modeling is conducted. Direct compression experimental tests are conducted for a variety of models with different thicknesses and materials. The results of the experiments show a nonlinear stiffness trend for the curved spring element. In addition, to observe the yielding of the curved spring, different strain gauges are installed in several positions to record the strain in the models during the application of compression load. The results reveal that the geometry and material characteristics have an important effect on the stiffness value of the spring. Furthermore, finite element simulations of models are performed, and results are compared with those of experimental tests. The results from the experiments, as well as model and finite element simulation, show the curved spring's potential to be used in the developed VSB system and can be installed as a lateral resistance system in a structure subjected to vibration excitation such as an earthquake. Finally, the efficiency of the aforementioned system is evaluated via pushover analysis in a bare frame via finite element simulation. The results from pushover analysis illustrate the efficiency of the variable stiffness bracing system in framed structures. Elsevier 2016-02 Article PeerReviewed application/pdf en http://psasir.upm.edu.my/id/eprint/16343/1/Numerical%20and%20experimental%20evaluation%20of%20a%20developed%20nonlinear%20curved%20spring%20element%20under%20compression%20force.pdf Fateh, Amir and Hejazi, Farzad and Jaafar, Mohd Saleh and Abd. Karim, Izian (2016) Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force. Journal of Constructional Steel Research, 117. pp. 115-125. ISSN 0143-974X http://www.sciencedirect.com/science/article/pii/S0143974X15301231 10.1016/j.jcsr.2015.10.011
institution Universiti Putra Malaysia
building UPM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider Universiti Putra Malaysia
content_source UPM Institutional Repository
url_provider http://psasir.upm.edu.my/
language English
description This paper presents an evaluation of a curved spring element that may be utilized in a developed variable stiffness bracing (VSB) system to confer the variable stiffness characteristic of the system.VSB system is established to protect the structure against dynamic loads induced by earthquake, wind and etc. To obtain the curved shape of the spring, mathematical modeling is conducted. Direct compression experimental tests are conducted for a variety of models with different thicknesses and materials. The results of the experiments show a nonlinear stiffness trend for the curved spring element. In addition, to observe the yielding of the curved spring, different strain gauges are installed in several positions to record the strain in the models during the application of compression load. The results reveal that the geometry and material characteristics have an important effect on the stiffness value of the spring. Furthermore, finite element simulations of models are performed, and results are compared with those of experimental tests. The results from the experiments, as well as model and finite element simulation, show the curved spring's potential to be used in the developed VSB system and can be installed as a lateral resistance system in a structure subjected to vibration excitation such as an earthquake. Finally, the efficiency of the aforementioned system is evaluated via pushover analysis in a bare frame via finite element simulation. The results from pushover analysis illustrate the efficiency of the variable stiffness bracing system in framed structures.
format Article
author Fateh, Amir
Hejazi, Farzad
Jaafar, Mohd Saleh
Abd. Karim, Izian
spellingShingle Fateh, Amir
Hejazi, Farzad
Jaafar, Mohd Saleh
Abd. Karim, Izian
Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force
author_facet Fateh, Amir
Hejazi, Farzad
Jaafar, Mohd Saleh
Abd. Karim, Izian
author_sort Fateh, Amir
title Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force
title_short Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force
title_full Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force
title_fullStr Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force
title_full_unstemmed Numerical and experimental evaluation of a developed nonlinear curved spring element under compression force
title_sort numerical and experimental evaluation of a developed nonlinear curved spring element under compression force
publisher Elsevier
publishDate 2016
url http://psasir.upm.edu.my/id/eprint/16343/1/Numerical%20and%20experimental%20evaluation%20of%20a%20developed%20nonlinear%20curved%20spring%20element%20under%20compression%20force.pdf
http://psasir.upm.edu.my/id/eprint/16343/
http://www.sciencedirect.com/science/article/pii/S0143974X15301231
_version_ 1643826185997647872
score 13.211869

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