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  4. Experimental Study on Cyclic Behaviors and Restoring Force Characteristics of Concrete Filled Steel Tube Columns Using Ultra-High Strength Steel
 
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conference paper

Experimental Study on Cyclic Behaviors and Restoring Force Characteristics of Concrete Filled Steel Tube Columns Using Ultra-High Strength Steel

Hayashi, Kazuhiro
•
Luo, Yunbiao
•
Nishi, Ryosuke
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2017
Proceedings of the 16th World Conference on Earthquake Engineering (16WCEE)
16th World Conference on Earthquake Engineering (16WCEE)

H-SA700 is a type of new ultra-high-strength structural steel that is more environmentally friendly and more suitable for mass production than conventional high-strength steel. The objective of this paper is to contribute to the practical application of CFT columns using such ultra-high-strength as a means to provide a significant increase in the seismic capacity of building structures. In this paper, the cyclic behavior of concrete filled steel tubes (CFTs) using H-SA700 was investigated experimentally. H-SA700 offers an approximately three time higher yield strain than that of conventional steel, and therefore, the CFT columns using H-SA700 reached their elastic limit when the infilled concrete sustained compressive strength, while the steel tube remained elastic at the moment. In such a case, it is unsafe to evaluate the strength by using the current design formula based on the superposed strength method. Due to the relatively low ductility of H-SA700, steel is not allowed to yield in the design of CFT columns. Nevertheless, the experimental results revealed that, comparing with CFT columns using conventional steel, the CFT columns using H-SA700 exhibited a substantially large capacity of plastic deformation, smaller axial deformation associated with local buckling, and a similar capacity of energy dissipation.

  • Details
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Type
conference paper
Author(s)
Hayashi, Kazuhiro
•
Luo, Yunbiao
•
Nishi, Ryosuke
•
Inamasu, Hiroyuki  
•
Nakashima, Masayoshi
Date Issued

2017

Publisher

International Association of Earthquake Engineering

Publisher place

Santiago, Chile

Journal
Proceedings of the 16th World Conference on Earthquake Engineering (16WCEE)
Issue

84

Subjects

Ultra-high Strength Steel

•

H-SA700

•

CFT Column

•

Restoring Force Characteristic

•

Design Formula

Peer reviewed

REVIEWED

Written at

OTHER

EPFL units
RESSLAB  
Event nameEvent placeEvent date
16th World Conference on Earthquake Engineering (16WCEE)

Santiago, Chile

January 9-13, 2017

Available on Infoscience
January 24, 2017
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/133901
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