Proceedings of the 4 th International Conference on Civil Engineering for Sustainable Development (ICCESD2018), 9~11 February 2018, KUET, Khulna, Bangladesh (ISBN-978-984-34-3501-6) ICCESD-2018-4257-1 FABRICATED STEEL BOX COMPOSITE COLUMN AND ITS ADVANTAGES - BANGLADESH PERSPECTIVE A.K.M. Ruhul Amin 1 , Md. Khasro Miah 2 and Md. Nazrul Islam 3 1 Ph.D Student, Department of Civil Engineering, DUET, Gazipur, Bangladesh, e-mail: ruhul69@yahoo.com 2 Professor, Department of Civil Engineering, DUET, Gazipur, Bangladesh, e-mail: mkhasro@duet.ac.bd 3 Professor, Department of Civil Engineering, DUET, Gazipur, Bangladesh, e-mail: nazrul2100@duet.ac.bd ABSTRACT Tall buildings are now widely constructed in all over the world. The construction materials strength is the key factor to build the high rise structures. Concrete has compressive strength, stiffness and stability whereas steel has tensile strength, ductile behavior but both of those behaviors are not found in one material.As a result the composite materials are requiredto build tall buildings. The combined behavior of steel and concrete is reduced the member size and provide more strength for constructing tall buildings. Steel is widely used as reinforcement in reinforced concrete structure. On the other hand, in steel building construction system, steel is used to build the main frame work to resist the structural forces. Steel construction is rapid and speedy work in respect to reinforce concrete construction work. So, considering all the behavior of steel and concrete, a new type of member with different shape and geometry of steel plate with concrete called composite members is developed. The composite column is one of them. There are three type of composite column according to their construction, geometry and placement of steel and concrete. The behavior of concrete is changing with it placement in column. The concrete confinement is a factor to implement the total concrete strength of a member. The strength of confined concrete is more than unconfined concrete. As a result the concrete filled box composite column is contributing better strength than other composite columns. The steel box composite column can be constructed in hot rolled tube or box section. But for the shape and size of the hot rolled box is fixed in its construction process. In cold rolled process, the steel box is fabricated with steel plate of different thickness like the built up members. As a result because of different typeand shape, different combination of plate can be made to fabricate the steel box. So the fabricated box is now popular for the box column construction all over the world. Also the box can be fabricated manually or automatically. There is some automated machine is available to fabricate the steel box. Keywords:steel box, fabrication, concrete properties,finite element,composite, ANSYS, 1. INTRODUCTION Tall buildings would be impossible without advances in technology. The composite steel frame skeleton was nothing,but a structural revolution when it was developed in Chicago in the late nineteenth century, and it has been evolving ever since. Early tall buildings constructed with cast iron framing were susceptible to fire and it was discovered that encasing the iron with concrete increased the material’s resistance to fire. United State of America introduced composite construction system in 1894. After that it used in many tall building structures all over the world. Experimental researches were carried out on the composite column for different shape and size, different materials strength, different ratio of steel and concrete proportion. The experimental and theoretical research were conducted on concrete filled steel tubular column from 1960 to 2000 by many researchers. Furlong (1967) conducted tests on the ultimate loads of concrete-filled steel box columns. Knowles and Park(1969), Tomii et al. (1977), Shakir-Khalil and Mouli (1990) and Schneider (1998) have conducted tests on concrete-filled steel tubular column. Ge and Usami (1992), Uy and Bradford(1995) and Uy (2000) studied on local bucking of concrete-filled steel box columns.