According to the method, at least one carbon fibre-reinforced polymer band is joined to the steel structure at the end regions thereof, capable of transferring tensile forces. Subsequently, at least one lifting element (7) disposed between the carbon fibre-reinforced polymer band (4) and the steel girder (3) to be reinforced in a region between these end anchorages (5), is extended substantially perpendicular to the carbon fibre-reinforced polymer band (4). So, a tensile force stress is generated between the end regions of the carbon fibre-reinforced polymer band (4). Then, a steel girder treated in such a manner includes at least one carbon fibre-reinforced polymer band, which is each joined to the steel structure (1) at the end regions thereof, capable of transferring tensile forces. In the region between these end regions, a lifting element (7) is disposed between the carbon fibre-reinforced polymer band (4) and the steel girder (3) to be reinforced, by means of which the carbon fibre-reinforced polymer band (4) is subjected to tensile stress by lifting away from the steel girder (3). The tensile force is transferred to the steel girder (3) via the anchoring elements (5).

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 structure including a first hollow-section Fibre Reinforced Polymer (FRP) member, and a second hollow-section FRP member arranged at an angle to the first member. A rod extends through the second member. The rod also has a threaded end section extending through or into the first member. The opposed end of the rod is fixed to a further member. A nut secures the threaded end section to the first member, and screwing of the nut and threaded end section together exerts a compressive force on the second member and a tensile force on the rod.

A structure including a first hollow-section Fibre Reinforced Polymer (FRP) member, and a second hollow-section FRP member arranged at an angle to the first member. A rod extends through the second member. The rod also has a threaded end section extending through or into the first member. The opposed end of the rod is fixed to a further member. A nut secures the threaded end section to the first member, and screwing of the nut and threaded end section together exerts a compressive force on the second member and a tensile force on the rod.

The present invention is a steel beam (10) having a steel profile (20) comprising a lower head (23) and an upper head (21) which is substantially parallel to said lower head (23), characterized by comprising cables (42) provided under the steel profile (23) along the length of the steel profile (20) and to which tensioning process is applied, and a lower reinforcing concrete (40) embodied by the steel profile (20) lower head (23) in the form of a layer in a manner covering the cables (42) so as to fix said cables (42) at their positions and tensions.

The present invention is a steel beam (10) having a steel profile (20) comprising a lower head (23) and an upper head (21) which is substantially parallel to said lower head (23), characterized by comprising cables (42) provided under the steel profile (23) along the length of the steel profile (20) and to which tensioning process is applied, and a lower reinforcing concrete (40) embodied by the steel profile (20) lower head (23) in the form of a layer in a manner covering the cables (42) so as to fix said cables (42) at their positions and tensions.

A structural support that can be used as a truss girder bridge crane, or the like. The support includes one or more rows 13 of segments 15, that are arranged in side by side relation along the length of the support. Each row 13 has extending there through at least one tensioning element 14 which is anchored at opposite ends of the row and is pretensioned with respect to the row in order to hold the segments of the row together. A support preferably includes one row 13 of segments 15 in a lower chord 11 of the support and another row 13 of segments in an upper chord of the support. Vertical framework is mounted between the chords with ends secured adjacent the segments 15 by the tensioning element. The individual segments and the tensioning elements may be directed to a construction site at the location of use and assembled into rows and the appropriate structural construction.

This invention refers to a structural system for floor and roof construction, based on a parallel arrangement of a set of composite pre-tensioned girders to provide support to a deck formed by layers of any given material. The composite girders are components formed by lengths of bamboo culms, steel components and fillings of mortar or other materials, arranged in such way that a maximum mechanical efficiency is obtained.

A structure including a first hollow-section Fibre Reinforced Polymer (FRP) member, and a second hollow-section FRP member arranged at an angle to the first member. A rod extends through the second member. The rod also has a threaded end section extending through or into the first member. The opposed end of the rod is fixed to a further member. A nut secures the threaded end section to the first member, and screwing of the nut and threaded end section together exerts a compressive force on the second member and a tensile force on the rod.

A tensioned construction beam comprises a main longitudinal body defining a beam length and opposite longitudinal ends. The main longitudinal body includes a tubular part extending along the beam length and defining a cavity therein that is circumscribed by an inner wall of this tubular part. One or more steel cables extend within the cavity along the beam length and are embedded therein via grout filling the cavity. The one or more steel cables have been submitted to a tension force prior to being embedded and released from this tension force such that the tension force is applied to the main longitudinal body.