A new type of reinforced concrete coupling beam confined by discontinuous steel plates is proposed. The proposed coupling beam confined includes longitudinal reinforcements, transverse reinforcements, concrete, and first and second web side steel plates. Longitudinal reinforcements are placed along the first direction. Transverse reinforcements are placed perpendicular to the first direction and to enclose the longitudinal reinforcements. Longitudinal reinforcements and transverse reinforcements are embedded in the concrete to form a reinforced concrete coupling beam. The reinforced concrete coupling beam has first and second surfaces opposite to each other on web sides, and third and fourth surfaces opposite to each other on flange sides. The first web side steel plate is placed on the first surface of the reinforced concrete coupling beam. The second web side steel plate is placed on the second surface of the reinforced concrete coupling beam.

A new type of reinforced concrete coupling beam confined by discontinuous steel plates is proposed. The proposed coupling beam confined includes longitudinal reinforcements, transverse reinforcements, concrete, and first and second web side steel plates. Longitudinal reinforcements are placed along the first direction. Transverse reinforcements are placed perpendicular to the first direction and to enclose the longitudinal reinforcements. Longitudinal reinforcements and transverse reinforcements are embedded in the concrete to form a reinforced concrete coupling beam. The reinforced concrete coupling beam has first and second surfaces opposite to each other on web sides, and third and fourth surfaces opposite to each other on flange sides. The first web side steel plate is placed on the first surface of the reinforced concrete coupling beam. The second web side steel plate is placed on the second surface of the reinforced concrete coupling beam.

Provided are a hollow composite beam using a dual-web and a construction method thereof. The hollow composite beam using a dual-web can secure space efficiency using a tendon installed in an internal space of a dual-web and can efficiently adjust a tensioning force using the tendon anchored by an anchoring wedge and a separable bolt, wherein the dual-web is formed as a web of a steel beam having a bottom flange on which a deck plate is supported.

Provided are a hollow composite beam using a dual-web and a construction method thereof. The hollow composite beam using a dual-web can secure space efficiency using a tendon installed in an internal space of a dual-web and can efficiently adjust a tensioning force using the tendon anchored by an anchoring wedge and a separable bolt, wherein the dual-web is formed as a web of a steel beam having a bottom flange on which a deck plate is supported.

A structural member section is provided that may be comprised of horizontal top and bottom flange elements interconnected by one or more vertical web member. The top flange of the member is serrated such that a series of serrations protrude horizontally in at least one direction from a top of the one or more vertical web member or are cut-out from the flange of a rolled shape. In one embodiment, the serrated top flange and at least a portion of the web member are intended to be encased by a horizontal concrete slab or slab-on-deck assembly. The slab material is capable of encasing all exposed surfaces of and curing around each serration to transfer horizontal shear forces between the serrated top flange and the slab material such that the member and slab behave compositely without needing additional reinforcing located within the voids between serrations.

A steel beam and a supporting arrangement for supporting a steel beam at console, the steel beam including a base plate, two web parts, and an end plate at each end of the steel beam. The base plate, the two web parts and the end plates delimit a space. At least one of the ends of the steel beam includes a console supporting slot extending from the at least one end of the steel beam. The console supporting slot is laterally at least partly limited by side plates inside the space of the steel beam, and by the side plates are attached to the end plate and to the base plate.

A steel beam and a supporting arrangement for supporting a steel beam at console, the steel beam including a base plate, two web parts, and an end plate at each end of the steel beam. The base plate, the two web parts and the end plates delimit a space. At least one of the ends of the steel beam includes a console supporting slot extending from the at least one end of the steel beam. The console supporting slot is laterally at least partly limited by side plates inside the space of the steel beam, and by the side plates are attached to the end plate and to the base plate.

A steel beam and a supporting arrangement for supporting a steel beam at console, the steel beam including a base plate, two web parts, and an end plate at each end of the steel beam. The base plate, the two web parts and the end plates delimit a space. At least one of the ends of the steel beam includes a console supporting slot extending from the at least one end of the steel beam. The console supporting slot is laterally at least partly limited by side plates inside the space of the steel beam, and by the side plates are attached to the end plate and to the base plate.

A steel beam and a supporting arrangement for supporting a steel beam at console, the steel beam including a base plate, two web parts, and an end plate at each end of the steel beam. The base plate, the two web parts and the end plates delimit a space. At least one of the ends of the steel beam includes a console supporting slot extending from the at least one end of the steel beam. The console supporting slot is laterally at least partly limited by side plates inside the space of the steel beam, and by the side plates are attached to the end plate and to the base plate.

A fracture caused by fatigue of a connecting portion positioned at a corner of a reinforcing frame directly secured to a frame is avoided regardless of a relative displacement that occurs in the frame upon disposing the reinforcing frame made of steel, which has an elevational shape surrounding the frame along an inner circumferential surface of the frame and a cross-sectional shape with a flange on a side of the frame, in a structure plane of the frame of a column and a beam of reinforced concrete structure, and joining the reinforcing frame to the inner circumferential surface of the frame. A reinforcing frame is constituted of a column portion along a column of a frame, a beam portion along a beam, and a connecting portion that is joined to the column portion and the beam portion, and connects the column portion to the beam portion. The connecting portion has a flange with a part close to the column portion and the beam portion formed to be shaped along an inner circumferential surface of the frame, and a part of the flange facing a corner of the frame formed into a shape in which a void is formed between the part and the corner of the frame.