International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 11 Issue: 07 | July 2024
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p-ISSN: 2395-0072
STUDY ON THE BEHAVIOUR OF CONCRETE FILLED STEEL TABULAR SHORT AND MEDIUM COLUMN UNDER GRAVITY LOADING. Sumer S Sutar, Ravindra M Desai P.G Student of Sanjay Ghodawat university, Assistant Professor of Sanjay Ghodawat university. Department of civil Engineering, Sanjay Ghodawat University college, Maharastra, India. ---------------------------------------------------------------------***--------------------------------------------------------------------Abstract - Concrete-Filled Steel Tubes (CFST) represent a their designs for greater strength, stability, and durability. hybrid structural system that effectively combines the compressive strength of concrete with the tensile strength and ductility of steel. This composite action results in enhanced structural performance, making CFST columns increasingly popular in modern construction applications, such as bridges, high-rise buildings, and infrastructure in seismic zones. This paper reviews the extensive research conducted on CFST sections, focusing on their mechanical properties, design methodologies, and applications. Experimental studies on CFST columns, considering parameters like length-to-diameter (L/D) ratio, diameter-to-thickness (D/t) ratio, and steel tube thickness, are discussed to evaluate their axial load-carrying capacity under gravity and lateral loading. The experimental results demonstrate the superior performance of CFST columns compared to conventional steel tubes, highlighting their increased strength, ductility, and stiffness. Advanced numerical modeling techniques and code compliance with standards such as Eurocode 4, ACI, AISC, and Australian standards are explored. The paper concludes by discussing the future potential of CFST in sustainable and resilient construction practices, considering advancements in materials science and construction technologies.
Seismic resistance CFST are a popular alternative for earthquake-prone areas due to their outstanding seismic performance. Studying their behavior under seismic loads leads to safer designs. Fire resistance CFST's fire resistance is crucial for building safety. Researching their behaviour under fire circumstances aids in the development of better fire-resistant structures. Sustainability CFST provides reduced material usage and increased structural efficiency, making it a sustainable solution. The study of their environmental impact aids in the development of more environmentally friendly designs. Innovative applications. The adaptability of CFST enables novel applications in offshore structures, bridges, and high-rise buildings. Researching their behavior in these circumstances broadens their possibilities.
1.2 Applications Concrete-Filled Steel Tube (CFST) technology has numerous uses in civil engineering and construction. Some of the important applications are: Bridge building: CFST elements are frequently utilized in the building of bridge piers, abutments, and other structural components. CFST bridge piers provide increased strength, longevity, and seismic resistance, making them suited for highway and railway bridges. High-rise structures use CFST columns and structural elements because they have a higher load-carrying capacity, are more fire resistant, and perform better seismically. CFST technology enables taller, more slender building designs while maintaining structural integrity and safety. maritime Structures: CFST piles are commonly used to construct maritime structures such as wharves, jetties, and offshore platforms. CFST piles have good corrosion resistance and load-bearing capacity, making them ideal for maritime situations. Retaining walls and excavation support systems are constructed with CFST sheet piles in civil engineering projects.
Key Words: CFST, Concrete, Column, Testing, Curing, HST, compound, UTM.
1.INTRODUCTION CFST stands for "Concrete-Filled Steel Tube." It's a type of composite structure where a steel tube is filled with concrete. This combination takes advantage of the high compressive strength of concrete and the high tensile and flexural strength of steel. CFST structures are widely used in civil engineering for various applications such as bridges, columns, and piles. The introduction of CFST technology revolutionized structural engineering by offering several advantages over traditional construction materials and techniques. However, it wasn't until the mid-20th century that CFST gained widespread recognition and acceptance in the field of structural engineering
1.1 Need of study/ Significance improved structural performance. Understanding how CFSTs behave under different loads allows designers to optimize
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