There is a truss structure, assembly and method of manufacturing a truss with a span L and a beam depth H. The truss having a main part includes a substantially planar top chord with a longitudinal centerline and webs connecting between the top chord and a bottom chord. The top chord is separated from the bottom chord by the webs. There is a top chord node where each web intersects with the centerline of the top chord and a bottom chord node where each web meets the bottom chord. At least two of the top chord nodes coincide with one another along the top chord. In use, the elements of the main part are in compression and the bottom chord includes a tension member.

A variable assembly PC member includes: a plurality of hollow PC modules, each of which has an upper flange and a lower flange spaced apart from each other, and a pair of webs connecting both ends of the upper flange and the lower flange to form a hollow therein; and connectors connecting the plurality of hollow PC modules with each other in the width direction.

A concrete ceiling element for producing a concrete ceiling is disclosed. The concrete ceiling element has a flat basic structure that has an upper side and at least one FRC plate. The concrete ceiling element has at least one FRC ridge. The FRC ridge is arranged on the upper side and connected in sections to the basic structure. Furthermore, a concrete ceiling and a method for producing a concrete ceiling or a concrete ceiling element are provided.

A structural assembly utilizing a reinforced concrete support element with a flexibly-braided reinforcement sleeve and a cable system for building structures. The reinforced concrete BMASS element has an approximately cylindrical shape and includes a substantially solid concrete core. An outer reinforcement sleeve with a flexible multi-axially braided configuration is embedded on the perimeter, and an inner reinforcement sleeve is embedded within the outer sleeve. A cable tension system connected between the ends of the BMASS element transmits tensile force from the cable to the BMASS element. The structural assembly can be configured as a beam or a column. In a beam configuration, the tensioned cable can also provide beam curvature and greater strength. A multi-cable embodiment includes a second cable, providing additional strength and greater ability to control curvature. One or more of the braces may include an adjustable arm. The tension may be adjusted manually, or remotely.

A structural assembly utilizing a reinforced concrete support element with a flexibly-braided reinforcement sleeve and a cable system for building structures. The reinforced concrete BMASS element has an approximately cylindrical shape and includes a substantially solid concrete core. An outer reinforcement sleeve with a flexible multi-axially braided configuration is embedded on the perimeter, and an inner reinforcement sleeve is embedded within the outer sleeve. A cable tension system connected between the ends of the BMASS element transmits tensile force from the cable to the BMASS element. The structural assembly can be configured as a beam or a column. In a beam configuration, the tensioned cable can also provide beam curvature and greater strength. A multi-cable embodiment includes a second cable, providing additional strength and greater ability to control curvature. One or more of the braces may include an adjustable arm. The tension may be adjusted manually, or remotely.

The present invention relates to a precast concrete member using a PC member, which comprises a prefabricated plate and fixing channels, and is used as a linear member for a column which is an axial force member, as a planar member for a wall which is an axial force member, or as a linear member for a beam or a girder which is a flexural member. A preferred embodiment of the present invention provides a premade precast concrete member having a PC body formed at a predetermined length and multiple steel reinforcements embedded within the PC body along the longitudinal direction, the precast concrete member comprising: a plate assembly in which a pair of board-like plates having a pair of coupling holes formed to be penetrated at a regular interval are formed so as to be spaced apart from each other and to face each other, or two pairs of board-like plates are spaced apart from each other so as to face each other, with one end of each thereof being embedded into one or both longitudinal ends of the PC body, and the other ends thereof protruding, wherein the plate assembly comprises a connecting member of which a part embedded into the PC body of the plate is welded to one side of the steel reinforcement, and both ends are respectively bolt-coupled to the coupling holes of a pair of plates so as to connect a part embedded into the PC body of a pair of facing plates; and fixing channels which comprise a U-shaped channel having an opening formed on the top thereof and multiple anchor bodies coupled to the rear surface of the U-shaped channel, the opening of the U-shaped channel comprising a rib which is formed to be bent inwardly, wherein at least two rows of fixing channels are embedded at regular intervals into one side surface of the width direction of the PC body or into at least one pair of corresponding surfaces of the width direction of the PC body.

Disclosed invention comprises innovations in the fabrication process and the associated design methodology for producing refined prestressed concrete elements/components. The innovations disclosed are fabrication using multiple stages, the use of ultra high strength materials for only critical subcomponents, utilizing thinner sections made of ultra high strength materials, and a unique method of inducing and controlling camber. The embodiments of this invention enable the accelerated construction of concrete structures that are both durable and cost effective. This disclosure demonstrates the significant improvements to the prior art in the areas of durability, constructability, and cost reduction for prestressed concrete components. The embodiments presented in this disclosure are for bridge superstructure applications.

Disclosed invention comprises innovations in the fabrication process and the associated design methodology for producing refined prestressed concrete elements/components. The innovations disclosed are fabrication using multiple stages, the use of ultra high strength materials for only critical subcomponents, utilizing thinner sections made of ultra high strength materials, and a unique method of inducing and controlling camber. The embodiments of this invention enable the accelerated construction of concrete structures that are both durable and cost effective. This disclosure demonstrates the significant improvements to the prior art in the areas of durability, constructability, and cost reduction for prestressed concrete components. The embodiments presented in this disclosure are for bridge superstructure applications.

Constructive system comprising at least four modular elongated prefabricated floor elements, each floor element defining a longitudinal axis parallel to its long side and a transversal axis parallel to its short side, and being arranged coplanar in a 2×2 matrix configuration such that each floor element is adjacent to another element by one of its long sides and adjacent to another of the elements by one of its short sides, the ends of the short sides of the floor elements resting on linear supporting elements, the floor elements comprising in the vertical face of each of the long sides a longitudinal groove having the direction of the longitudinal axis such that a cavity is formed between each pair of adjacent floor elements, the cavities being filled with a grouting, the system including at least one duct extending continuously along the two cavities and a post-tensioned tendon within the duct.

The invention provides a prefabricated structural element including an elongate body (11) and at least one first tensioner (1) that is fastened in the elongate body in such a manner that it compresses the elongate body. The structural element includes at least one second tensioner (2) that is fastened to the elongate body at two distinct points by two fastener element so that it compresses the elongate body, at least one of the fastener element being removable so as to make it possible to relax the compression exerted on the elongate body by the second tensioner.