Abstract: The invention concerns a reinforced concrete or prestressed concrete part stressed by shearing forces with layers of reinforcement (22, 24) provided at its upper and lower sides. For shear protection at least one sheet metal reinforcing part (30, 32, 34, 36) is provided between these layers of reinforcement which mainly extends at right angles to a surface of the reinforced concrete part and mainly over the entire distance between the layers of reinforcement (22, 24) and crosswise to at least one crack (50) occurring in the reinforced or prestressed concrete part under transverse load.

Abstract: The clamping element is supported in a positive fit on the base plate in the direction of traction of the traction element in the anchoring for pre-stressed strip-shaped traction elements on supporting structures. The traction element is received between a base plate which is fixed to the supporting structure and a clamping plate which can be clamped against the base plate and is fixed by adhesion and clamping. The clamping plate can include, on each side of the traction element, a retaining cam plate which projects in a downward manner and which engages in a retaining recess of the base plate, or can include a retaining projection which supports a stop which is connected to the base plate. The stops on the upper side of the base plate are welded push blocks which are arranged on both sides and/or in the region of the front side of the clamping plate.

Abstract: A tie anchor for strip-type tension members includes an anchor body disposed on at least one side of the tension member. The anchor body includes a plurality of clamping blocks arranged at a distance from each other in a longitudinal direction of the tension member. The clamping blocks are connected to tension member by adhesive and/or friction (clamping friction). An end-most (final) one of the clamping blocks is attached to a fixed abutment. Adjacent clamping blocks are interconnected by expansion members whose spring stiffness becomes progressively stronger toward the end-most clamping block.

Abstract: Pre-stressed, strip-type tension members are applied to supporting structures, especially concrete supporting structures. To this end, a clamping device is used to pre-stress the tension member at least at one end, at a distance from the surface of the supporting structure, by a temporary clamping element which is fixed to the tension member, and the tension member is then pressed onto the surface by at least one permanent brace. The two temporary clamping elements are removed from the surface once the tension member has been pressed onto the surface.

Abstract: The clamping element is supported in a positive fit on the base plate in the direction of traction of the traction element in the anchoring for pre-stressed strip-shaped traction elements on supporting structures. The traction element is received between a base plate which is fixed to the supporting structure and a clamping plate which can be clamped against the base plate and is fixed by adhesion and clamping. The clamping plate can include, on each side of the traction element, a retaining cam plate which projects in a downward manner and which engages in a retaining recess of the base plate, or can include a retaining projection which supports a stop which is connected to the base plate. The stops on the upper side of the base plate are welded push blocks which are arranged on both sides and/or in the region of the front side of the clamping plate.

Abstract: A tensioning device for strip-shaped tension members on supporting structures, especially concrete supporting structures, exhibits a tensioning traverse, which is detachably fastened to a base plate that is permanently fastened to the supporting structure. A prestressing ancho), which is connected to the strip-shaped tension member by means of clamping, may be displaced by means of pressing elements for the purpose of applying tension to tension member and supported against the tensioning traverse or the base plate. A guide body, which supports the tension member so that it may glide, at least upward, is arranged between the tensioning traverse and the prestressing anchor so as to be stationary. The guide body exhibits a guide slit that accommodates the tension member so that it can glide, and it is mounted on a guide support that is connected to the tensioning traverse so as to be deflection resistant.

Abstract: Pre-stressed, strip-type tension members are applied to supporting structures, especially concrete supporting structures. To this end, a clamping device is used to pre-stress the tension member at least at one end, at a distance from the surface of the supporting structure, by a temporary clamping element which is fixed to the tension member, and the tension member is then pressed onto the surface by at least one permanent brace. The two temporary clamping elements are removed from the surface once the tension member has been pressed onto the surface.

Abstract: The invention relates to a tie rod for a strip-type tension member (1), used in the building trade, and consisting especially of fibre-reinforced plastic lamellae. Said tie rod comprises at least one anchoring body (2) which is positively connected to the tension member (1) by means of adhesion and/or friction, and can be supported on a fixed abutment. The anchoring body (2) comprises a plurality of clamping blocks (3) which are arranged at a distance from each other in the longitudinal direction of the tension member and are connected to said tension member (1) by means of adhesion and/or friction. One of said clamping blocks is supported on the fixed abutment (7), and the clamping blocks are interconnected by extension sections (9) having different spring stiffnesses, the spring stiffnesses of said extension sections (9) increasing towards the end of the tension member (1).

Abstract: The invention concerns a reinforced concrete or prestressed concrete part stressed by shearing forces with layers of reinforcement (22, 24) provided at its upper and lower sides. For shear protection at least one plane reinforcing part (30, 32, 34, 36) is provided between these layers of reinforcement which mainly extends at right angles to a surface of the reinforced concrete part and mainly over the entire distance between the layers of reinforcement (22, 24) and crosswise to at least one crack (50) occurring in the reinforced or prestressed concrete part under transverse load.

Abstract: A concrete tensioning band is disposed on a surface of unhardened concrete and tensioned by being attached to a clamp disposed on the base, and then displacing the clamp by a drive mechanism disposed on the clamp. Such displacement serves to tension the band. Spacers are positioned between the clamp and the base to hold the clamp in the displaced state while the drive mechanism is removed and an anchor device is fixed to the band to anchor the band to the base. Then, the clamp is removed.

Abstract: A reinforced or prestressed concrete structure is strengthened and/or restored by attaching a strip-shaped tensional member thereto. Prior to attaching the tensional member, a central portion thereof is prestressed. Then, the tensioned central portion is bonded to a concrete surface of the concrete structure by a first adhesive having a high deformation modulus. Thereafter, the non-prestressed end portions of the tensional member are bonded to the concrete surface by a second adhesive having a low deformation modulus, whereby the second adhesive is substantially less deformable than the first adhesive.

Abstract: A dowel member for reinforcing concrete structures includes a metal strip and a plurality of dowels projecting perpendicularly from the strip. Each dowel includes a dowel shank welded at one of its ends to the strip, and a dowel head disposed at the other of its ends. The dowel shank includes a center section having ribs on its outer periphery, and a pair of end sections having smooth cylindrical outer peripheries.

Abstract: A height adjustable pot bearing is provided having a pot, a steel cover plate and an elastic plate of substantially incompressible elastomeric material disposed in and completely filling the pressure chamber defined between the cover plate and the pot. A circumferential slot is provided in the base of the elastic plate radially inwardly from the outer wall of the plate so that a circumferential lip is formed. The pressurized fluid supplied to the pressure chamber of the pot bearing presses against the base of the elastic plate to lift the elastic plate and the cover plate and forces the circumferential lip radially outwardly against the wall of the pot to seal thereagainst.

Abstract: A concrete slab is connected to a column passing therethrough. Embedded in the slab are insert parts each having a first recess. The slab also carries a ridge-like reinforcement which includes bars that project through the first recesses and into second recesses carried by the column. The recesses correspond to the cross-sectional shape of the bars and tightly engage same.