Abstract
The FRP-confined concrete-encased steel column is a new form of hybrid column, which integrates advantages of all the constituent materials. Its structural performance, including load carrying capacity, ductility, and corrosion resistance, has been demonstrated to be excellent by limited experimental investigation. Currently, no systematic procedure, particularly for that with reinforced structural steel of arbitrary shapes, has been proposed for the sectional analysis and design for such novel hybrid columns under biaxial loading. The present paper aims at filling this research gap by proposing an approach for the rapid section analysis and providing rationale basis for FRP-confined concrete-encased arbitrarily shaped steel columns. A robust iterative scheme has been used with a traditional so-called fiber element method. The presented numerical examples demonstrated the validity and accuracy of the proposed approach.
Highlights
Lateral confinement leads to the compressed concrete under multiaxial compression and results in enhancements in both ductility and strength of the compressed concrete [1]
The present paper proposes an approach for the rapid section analysis and provides rationale basis for Fiber reinforced polymer (FRP)-confined concrete-encased arbitrarily shaped steel columns
This paper presents an approach for the rapid sectional analysis and design of short FRP-confined concreteencased arbitrarily shaped steel columns under biaxial loading
Summary
Lateral confinement leads to the compressed concrete under multiaxial compression and results in enhancements in both ductility and strength of the compressed concrete [1]. Concrete-filled steel tubular columns, which have been widely used in high-rise buildings, bridges, etc., are utilizing the increased strength and deformability of confined concrete to achieve a high structural performance [3, 4] In such a composite column, an outer steel tube is used to replace longitudinal and transverse steel reinforcements in conventional reinforced concrete columns and to provide continuous confinement to concrete infilled. The presented numerical examples demonstrated the validity and accuracy of the proposed approach
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