Lateral Impact Response of Rubberized-Fibrous Concrete-Filled Steel Tubular Columns: Experiment and Numerical Study

This paper presents an experimental and numerical study on the lateral impact behavior of rubberized-fibrous concrete-filled steel tubular (CFST) columns. Four types of concrete were utilized in the experimental program in the infilled columns: normal concrete (NC), rubberized concrete (RuC), steel...

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Bibliographic Details
Published in:Buildings (Basel) 2022-10, Vol.12 (10), p.1566
Main Authors: Merwad, Abdullah M., El-Sisi, Alaa A., Mustafa, Suzan A. A., Sallam, Hossam El-Din M.
Format: Article
Language:English
Subjects:
Boundary conditions
Concrete columns
concrete filled steel tube (CFST)
Concrete mixing
Construction
Deformation
Ductility
Energy
Energy absorption
Failure modes
Finite element method
Hammers
High speed cameras
Impact analysis
impact energy
Impact loads
Impact response
lateral impact
Mechanical properties
Plastic deformation
Reinforced concrete
Rubber
rubberized concrete
Steel
Steel columns
Steel fibers
Steel tubes
steel-fiber concrete
Tensile strength
Three dimensional models
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Summary:This paper presents an experimental and numerical study on the lateral impact behavior of rubberized-fibrous concrete-filled steel tubular (CFST) columns. Four types of concrete were utilized in the experimental program in the infilled columns: normal concrete (NC), rubberized concrete (RuC), steel fiber concrete (SFC), and hybrid RuC-SFC. Twelve specimens were tested using drop-weight impact with fixed-sliding boundary conditions. Three different transverse impact energies were produced by applying two masses of the hammers dropped from two different heights. A high-speed camera was implemented to measure the mid-span deflection against time. A 3-D finite element model was presented and verified against the tested specimens and some other experimental work from the literature. Load-displacement curves, the impact force time history, impact energy absorption, and failure modes of the CFST columns under the lateral impact were fully analyzed. The present results showed that at, certain impact energies, the steel tubular suffered only from the plastic deformation, beyond which it started cracking depending on the type of filled concrete. The steel tubular filled with hybrid RuC-SFC showed the highest resistance to crack formation, followed by that filled with SFC, while those filled with NC showed the lowest resistance to crack formation. There is an agreement between the numerical and the experimental results.
ISSN:2075-5309
2075-5309
DOI:10.3390/buildings12101566