Abstract: A steel composite beam is manufactured by T-shaped steel, inverse T-shaped steels installed at opposite ends of the T-shaped steel, and vertical stiffeners installed on the inverse T-shaped steels. A method for manufacturing a composite beam using T-shaped steel and a method of constructing a structure using the same are capable of using less steel and minimizing dead weight of the composite beam compared to a steel composite beam having the same cross section and depth, and designing a cross section of the composite beam in an efficient and economical manner due to the pre-stress caused by tendons, providing easy connection with column members on the basis of length, providing efficient construction, easy management, and convenient construction for ceilings and finishing equipment due to light dead weight.

Abstract: Provided are a stiffener for connecting a prestressed concrete beam and a method of constructing a structure using the same, in which the beam such as the prestressed concrete beam which is covered with concrete is connected to a target structure including a column structure or a girder. The stiffener is made up of a buried stiffener, an end face stiffener, and a joint stiffener, thereby enabling simple connection, excellent stress transmission, and very efficient construction of (building) structures.

Abstract: A steel composite beam is manufactured by T-shaped steel, inverse T-shaped steels installed at opposite ends of the T-shaped steel, and vertical stiffeners installed on the inverse T-shaped steels. A method for manufacturing a composite beam using T-shaped steel and a method of constructing a structure using the same are capable of using less steel and minimizing dead weight of the composite beam compared to a steel composite beam having the same cross section and depth, and designing a cross section of the composite beam in an efficient and economical manner due to the pre-stress caused by tendons, providing easy connection with column members on the basis of length, providing efficient construction, easy management, and convenient construction for ceilings and finishing equipment due to light dead weight.

Abstract: A steel-concrete composite beam includes a long rectangular steel frame; concrete members installed at only both ends of the steel frame, excluding a center portion thereof; a prestressable reinforcement buried in the concrete member; and a stirrup reinforcement arranged to the concrete member with a regular gap thereto to surround a lower flange of the steel frame.

Abstract: Provided are a stiffener for connecting a prestressed concrete beam and a method of constructing a structure using the same, in which the beam such as the prestressed concrete beam which is covered with concrete is connected to a target structure including a column structure or a girder. The stiffener is made up of a buried stiffener, an end face stiffener, and a joint stiffener, thereby enabling simple connection, excellent stress transmission, and very efficient construction of (building) structures.