Behavior and Strength of Steel Fiber Reinforced Self-compacting Concrete Columns Wrapped by Carbon Fiber Reinforced Polymers Strips

Abstract

Strength capacity of reinforced concrete columns is very important to resists and transmit the external loadings. For Architects the engineerings requirements to use small cross section of reinforced concrete columns or in case of poor control quality we need to increase the compressive strength of concrete or use a strengthening technique of the structural elements such as column. In the present paper, the behavior and strength of four steel fiber reinforced self-compact concrete columns reinforced by one layer of CFRP that is wrapped around a square of reinforced concrete columns subjected to static loads is investigated. Self-compacting concrete by using limestone powder is adopted and is mixed with different percentages of steel fiber such as 1%, 1.5% and 2%. Different tests are adopted to investigate the mechanical properties of self-compacted concrete mixed with different steel fiber percentages. Test results show that there is an increase in concrete mechanical properties such as compressive strength, splitting tensile strength and modulus of rupture that reflects on the increase in load capacity of column; specimens when wrapped by CFRP. The increment in columns strength capacity is more than 50% as compared with the control column. All the test specimens are modeled using finite element analysis by ANSYS and the numerical results are compared with tested specimens.

A Numerical Study to Investigate Shear Behavior of High-strength Concrete Beams Externally Retrofitted with Carbon Fiber Reinforced Polymer Sheets

“…Several causes contribute to the necessity of retrofitting the existing facilities, such as strength loss due to corrosion, erosion, or deterioration caused by nature effects. Changing the use, expanding the facility, and upgrading the structure to resist higher loads also require correcting design or construction weaknesses [1,2]. Retrofitting of facilities is a common practice; therefore, retrofitting approaches have been offered and evolved over years of practical and experimental work.…”

Mechanical Properties of High-Strength Self-Compacting Concrete

“…Self-compacting concrete (SCC) is a type of concrete that flows easily, consolidates, and spreads into formwork without the need for external vibration. High-strength self-compacting concrete (HSSCC) is formulated to have high compressive strengths, typically exceeding 60 MPa. , The production of HSSCC requires different materials and mix proportions compared to normal vibrating concrete (NVC), and therefore, a comprehensive understanding of its mechanical properties is essential. The use of HSSCC in construction is becoming increasingly popular due to its potential for reducing construction costs, improving workability, and improving durability.…”

Synthesis and Characterization Unsaturated Polyester Resin Nanocomposites Reinforced by Fe2O3+ Ni Nanoparticles: Influence on Mechanical and Magnetic Properties

“…Thermosetting as polymer matrix are characterized as a low molecular weight solids and low viscosity liquids which they need reinforcement materials as a cross-linking agent to be *Corresponding Author Institutional Email: 50123@uotechnology.edu.iq (K. D. Salman) cured and formulated. Also, thermosetting polymer can be incorporated with nanoparticles of fibers reinforcements to improve the mechanical, thermal, electrical and magnetics properties [2].…”