Numerical Study and Design Recommendations of Eccentrically Loaded Partially Encased Composite Columns

A numerical investigation is presented in this paper on partially encased composite (PEC) columns subjected to eccentric loading. 3D finite element (FE) models were established based on the dynamic explicit method, which were validated by comparing the FE outcomes with some available test results in...

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Bibliographic Details
Published inInternational journal of steel structures Vol. 19; no. 3; pp. 991 - 1009
Main Authors Wang, Hai, Li, Jie, Song, Yuchen
Format Journal Article
LanguageEnglish
Published Seoul Korean Society of Steel Construction 01.06.2019
Springer Nature B.V
한국강구조학회
Subjects
Building codes
Civil Engineering
Composite columns
Composite structures
Design modifications
Eccentric loads
Eccentricity
Engineering
Finite element method
Materials Science
Mathematical analysis
Mathematical models
Parametric statistics
Solid Mechanics
Three dimensional models
토목공학
Parametric study
Finite element analysis
Partially encased composite column
Design recommendation
Force–moment interaction model
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Summary:A numerical investigation is presented in this paper on partially encased composite (PEC) columns subjected to eccentric loading. 3D finite element (FE) models were established based on the dynamic explicit method, which were validated by comparing the FE outcomes with some available test results in previous literature. Using the verified model, a parametric study was conducted to investigate the effects of several factors on the strength and behaviors of PEC columns, including the concrete strength, the steel yield strength, and the load eccentricity. The outcomes of the FE analyses, together with the test results reported in previous studies, were compared with the capacities predicted by the current design codes for eccentrically loaded PEC columns. It was found that the existing design methods with the assumption of rectangular stress blocks (fully plastic assumption) could be unconservative in some circumstances. Therefore, a modified partially plastic design approach was proposed based on the Eurocode 4 design method, which was confirmed to be conservative yet economic in predicting the interactive force–moment (N–M) capacity of PEC columns under eccentric compression.
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ISSN:1598-2351
2093-6311
DOI:10.1007/s13296-018-0179-7