Experimental Research on Reinforced Concrete Columns Strengthened with Steel Jacket and Concrete Infill

Experimental research on axially compressed columns made from reinforced concrete (RC) and RC columns strengthened with a steel jacket and additional fill concrete is presented in this paper. A premade squared cross-section RC column was placed inside a steel tube, and then the space between the col...

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Published inApplied sciences Vol. 11; no. 9; p. 4043
Main Authors Landović, Aleksandar, Bešević, Miroslav
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.05.2021
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Abstract Experimental research on axially compressed columns made from reinforced concrete (RC) and RC columns strengthened with a steel jacket and additional fill concrete is presented in this paper. A premade squared cross-section RC column was placed inside a steel tube, and then the space between the column and the tube was filled with additional concrete. A total of fourteen stub axially compressed columns, including nine strengthened specimens and five plain reinforced concrete specimens, were experimentally tested. The main parameter that was varied in the experiment was the compressive strength of the filler concrete. Three different concrete compression strength classes were used. Test results showed that all three cross-section parts (the core column, the fill, and the steel jacket) worked together in the force-carrying process through all load levels, even if only the basic RC column was loaded. The strengthened columns exhibited pronounced ductile behavior compared to the plain RC columns. The influence of the test parameters on the axial compressive strength was investigated. In addition, the specimen failure modes, strain development, and load vs. deformation relations were registered. The applicability of three different design codes to predict the axial bearing capacity of the strengthened columns was also investigated.
AbstractList Experimental research on axially compressed columns made from reinforced concrete (RC) and RC columns strengthened with a steel jacket and additional fill concrete is presented in this paper. A premade squared cross-section RC column was placed inside a steel tube, and then the space between the column and the tube was filled with additional concrete. A total of fourteen stub axially compressed columns, including nine strengthened specimens and five plain reinforced concrete specimens, were experimentally tested. The main parameter that was varied in the experiment was the compressive strength of the filler concrete. Three different concrete compression strength classes were used. Test results showed that all three cross-section parts (the core column, the fill, and the steel jacket) worked together in the force-carrying process through all load levels, even if only the basic RC column was loaded. The strengthened columns exhibited pronounced ductile behavior compared to the plain RC columns. The influence of the test parameters on the axial compressive strength was investigated. In addition, the specimen failure modes, strain development, and load vs. deformation relations were registered. The applicability of three different design codes to predict the axial bearing capacity of the strengthened columns was also investigated.
Author Landović, Aleksandar
Bešević, Miroslav
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  surname: Landović
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  surname: Bešević
  fullname: Bešević, Miroslav
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CitedBy_id crossref_primary_10_3390_app12083771
crossref_primary_10_3390_app132312634
crossref_primary_10_1515_eng_2022_0414
crossref_primary_10_1007_s42107_022_00541_w
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Snippet Experimental research on axially compressed columns made from reinforced concrete (RC) and RC columns strengthened with a steel jacket and additional fill...
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StartPage 4043
SubjectTerms composite action
Compression
Compression tests
Compressive strength
Concrete
Concrete columns
confined concrete
Cross-sections
Ductility
experimental investigation
Experimental research
Failure modes
Investigations
Load
Parameters
Redevelopment
Reinforced concrete
reinforced concrete column
Stainless steel
Steel
strengthening–jacketing
Stress state
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Title Experimental Research on Reinforced Concrete Columns Strengthened with Steel Jacket and Concrete Infill
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https://doaj.org/article/f6355aa1a0244a2b94314886d6ab145e
Volume 11
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