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International Research Journal of Engineering and Technology (IRJET)

e-ISSN: 2395-0056

Volume: 10 Issue: 06 | June 2023

p-ISSN: 2395-0072

www.irjet.net

FINITE ELEMENT ANALYSIS OF STEEL BEAM-CFST COLUMN JOINTS CONFINED WITH CFRP BELT AND REBAR Megha Lakshmi. S1, Akbar Shah A.A2 1Megha Lakshmi. S, Dept of Civil Engineering, ICET Mulavoor, Kerala

2Akbar Shah. A.A, Assistant Professor,Dept of Civil Engineering, ICET Mulavoor, Kerala

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Abstract - Concrete-filled steel tube (CFST) is becoming

connections are designed to transfer the maximum moment capacity of the beam to the column. They are often found in structures that require high stiffness and strength, such as high-rise buildings and bridges. In full-strength connections, the reinforcing steel of the beam is embedded in the column so that the beam and column behave as a single unit under load. In contrast, partial strength connections are designed to transfer some of the moment capacity of the beam to the column. They are used in low-rise buildings and parking garages that require moderate stiffness and strength. Bolts, plates or other fasteners are used to connect the beam and column in partial strength connections.

increasingly popular in the construction industry due to their numerous advantages over reinforced concrete columns (RCC). A CFST column consists of a steel tube filled with concrete. The main strength and stiffness are provided by the steel tube, while the concrete core provides additional compressive strength and fire resistance. CFST columns outperform reinforced concrete columns in terms of strength-to-weight ratio, deformability, fire resistance, improved construction efficiency, lower dimensions, and environmental performance. CFST columns are preferred by architects and engineers for structures that require high strength, durability and fire resistance. CFRP is a composite material composed of carbon fibers and a polymer matrix, usually epoxy. CFRP is a material with high strength and stiffness that is extensively utilized in aerospace, automotive and sports applications. This paper focuses on using CFRP as a joint belt as well as rebar in a Square Steel Beam- CFST Column connection system to improve the load carrying capacity by studying various arrangement of the belt layout and explores different configuration of the beam column system where they can be employed through Finite Element Analysis (FEA) with the help of ANSYS software.

Beam-column connections require precise details to function properly. Proper design of the details ensures that the connection will withstand the loads and moments expected during the life of the structure. Reinforcing steel must be carefully placed and secured to resist the tensile and compressive forces transmitted through the connection. The geometry of the connection is another important consideration in the design of beam-column connections. The transfer of forces and moments between the beam and the column is determined by the geometry of the connection. Depending on the individual requirements of the structure, many different connection geometries are used. Common connection geometries include bolted end plate connectors, welded connections, and articulating connections. Beamcolumn connections must be designed and planned in detail, but construction quality monitoring is also important to ensure their performance. The construction process must ensure that the connection is built in accordance with the design and detail criteria. Reinforcing steel must be installed in accordance with the design, and appropriate concrete cover must be provided to prevent steel corrosion. Beamcolumn connections are key components of structures in civil engineering. Their design, details and construction must be carefully considered to ensure the safety, performance and durability of the structure. The connection type, geometry and details must be selected based on the individual requirements of the structure. Beam-column connections can ensure reliable and safe structural performance when properly designed, detailed and quality controlled. In this paper, square concrete-filled steel tubes (CFST) with CFRP reinforcement and CFRP belt in beamcolumn connection, strengthening methods and configurations are studied.

Key Words: CFST column, Steel Beam, CFRP, Connection system, Finite Element Analysis, ANSYS software

INTRODUCTION

Beam-column connections are important components of load-bearing structures in civil engineering. They are responsible for transferring loads from the beams to the columns, which then transfer the loads to the foundation. The design, detailing and construction of beam-column connections have a significant impact on the performance of a structure. Therefore, adequate attention must be given to these connections throughout the design and construction of the structure. Beam-column connections in reinforced concrete structures are often designed as moment connections. The purpose of moment connections is to transfer bending moments from the beam to the column. They are chosen instead of shear connections because they give a stiffer and stronger connection, resulting in higher structural performance. Depending on the extent of connection stiffness, moment connections are referred to as either full-strength or partial-strength. Full-strength

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