Influence of Load Eccentricity on Structural Response of Slender Hybrid Self-compacting Concrete Columns with Reactive Powder Concrete Shells under Uniaxial Loading

Salman Al-Taai, A. A.; Waryosh, W. A.

doi:10.5829/ije.2026.39.08b.18

Influence of Load Eccentricity on Structural Response of Slender Hybrid Self-compacting Concrete Columns with Reactive Powder Concrete Shells under Uniaxial Loading

Document Type : Original Article

Authors

A. A. Salman Al-Taai

W. A. Waryosh

Civil Engineering Department, College of Engineering, Mustansiriyah University, Baghdad, Iraq

10.5829/ije.2026.39.08b.18

Abstract

In this paper, a comprehensive investigation of the behavior of slender hybrid reinforced concrete columns consisting of self-compacting normal concrete (SC-NC) and reactive powder concrete (SC-RPC) shells with eccentric compression at different eccentricity ratios is presented. Three eccentricities (0.25, 0.65, and 0.9) were used to carry out these tests on six specimens, divided into three groups according to the eccentricity ratio. Each group included one reference specimen with a conventional SC-NC shell and one hybrid specimen with an RPC shell. The results showed that RPC contributed to the axial load capacity, and moment capacities. It is found that axial capacity increased by 57.8%, 21.1%, and 46.9% for small, medium, and large eccentricities, and moment capacity can increase by up to 56%. The RPC-reinforced specimens demonstrated higher absorption energy and lower lateral deflections. The results validate the effectiveness of RPC to improve the structural performance and behavior of hybrid columns subjected to eccentric uniaxial loading and the findings may offer relevant insights for applications in seismic-resistant and high-rise structures.

Graphical Abstract

Influence of Load Eccentricity on Structural Response of Slender Hybrid Self-compacting Concrete Columns with Reactive Powder Concrete Shells under Uniaxial Loading

Keywords

Hybrid Self-compacting Concrete Slender Columns Uniaxial Loading Outer Shells Reactive Powder Concrete

Subjects

Structural Engineering

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