The present invention discloses a multi-dimensional eddy current tuned mass damper, which belongs to the technical field of structural vibration control. A main body of the multi-dimensional eddy current tuned mass damper is composed of two hollow cylinders, wherein an inner hollow cylinder is located in an outer hollow cylinder, ball grooves are formed in the opposite upper and lower walls of the inner and outer hollow cylinders, rolling balls are installed in the ball grooves, and the inner hollow cylinder is rotated in the outer hollow cylinder through the rolling balls; the inner hollow cylinder is provided with an inner cover plate, and the outer hollow cylinder is provided with an outer cover plate, forming a relatively closed box body structure; an orthogonal bidirectional mass element, a stiffness element and an eddy current damping element are arranged in the inner hollow cylinder, and a torsional stiffness element and an eddy current damping element are arranged between the inner hollow cylinder and the outer hollow cylinder. The multi-dimensional eddy current tuned mass damper of the present invention is not only convenient to adjust in terms of mass, stiffness and damping parameters, but also has regular and beautiful appearance, simple structure, and very simple connection with a main structure.

A wedge-shaped pushing device for bridge and construction method thereof includes a base, a lifter and a pushing mechanism. The top of the base has a platform with a wedge-shaped block; the wedge-shaped block has a top side formed into an upper slope; the top of the lifter has a pad; the pushing mechanism has an upper wedge-shaped seat, hydraulic cylinders and a support seat; the upper wedge-shaped seat has top with a cushion and a bottom formed into a lower slope; the hydraulic cylinder has a piston rod; the support seat has a top fixed and combined with the hydraulic cylinder by a pivot. By the wedge-shaped pushing device, the box girder can be displaced and pushed to achieve the effects of lowering the construction cost, facilitating the installation, and improving the stability and safety of the displacement and pushing of the box girder.

Disclosed is an oil pressure type seismic mitigation and isolation support and a use method thereof. An upper plate slot is arranged above a lower plate slot, the lower part of the upper plate slot and the upper part of the lower plate slot are both provided with grooves, and the upper part of the upper plate slot and the lower part of the lower plate slot are both provided with embedded bars; a steel cushion body has a shape of a cuboid and is arranged on the upper surface of a seismic mitigation layer, the seismic mitigation layer is arranged in the groove at the upper part of the lower plate slot, and the upper part of the steel cushion body extends into the groove of the upper plate slot and is in contact with the bottom surface of the groove one-direction double-direction.

Disclosed is an oil pressure type seismic mitigation and isolation support and a use method thereof. An upper plate slot is arranged above a lower plate slot, the lower part of the upper plate slot and the upper part of the lower plate slot are both provided with grooves, and the upper part of the upper plate slot and the lower part of the lower plate slot are both provided with embedded bars; a steel cushion body has a shape of a cuboid and is arranged on the upper surface of a seismic mitigation layer, the seismic mitigation layer is arranged in the groove at the upper part of the lower plate slot, and the upper part of the steel cushion body extends into the groove of the upper plate slot and is in contact with the bottom surface of the groove one-direction double-direction.

In one embodiment, a decking system provides a surface upon which traffic may travel. Drivable decking surfaces can support heavy vehicles, such as tanks. Exemplary decking systems include a first module, a second module, a first upper fastening assembly, a first lower fastening assembly, a second upper fastening assembly, and a second lower fastening assembly. These fastening assemblies can secure the first module and the second module together. Decking systems may also include side ramp assemblies and/or end ramp assemblies, and such ramp assemblies can be coupled with a decking platform. Fastening assemblies may include a pin, a first clip, and a second clip.

Support for decks (3) of bridges, viaducts and the like, comprising a first and a second surface (6, 7), for the application and countering of a load, respectively, which can slide relatively and an anti-friction bearing (8) arranged between said surfaces (6, 7), the bearing (8) comprising at least one electrical contact (11) which is embedded therein at a predetermined distance from at least one of said opposing sides (9, 10) and can close or open an alarm circuit (15) as a result of predetermined wear and tear of said bearing (8).

Support for decks (3) of bridges, viaducts and the like, comprising a first and a second surface (6, 7), for the application and countering of a load, respectively, which can slide relatively and an anti-friction bearing (8) arranged between said surfaces (6, 7), the bearing (8) comprising at least one electrical contact (11) which is embedded therein at a predetermined distance from at least one of said opposing sides (9, 10) and can close or open an alarm circuit (15) as a result of predetermined wear and tear of said bearing (8).

A first arch and second arch are produced in respective first and second structural portions. Each arch has a tie rod interconnecting the foot points of the arch, where a foot point of the arch is displaceably mounted. Each tie rod is tensioned so that horizontal forces caused by the weight of the arches at the foot points of the corresponding arch, are taken up by the tie rods. A first end point of the tie rod of the first arch is connected in a force-fitting manner to the first abutment, and a second end point of the tie rod of a last arch is connected in a force-fitting manner to the second abutment. The remaining adjoining end points of the tie rods are connected to one another in a force-fitting manner, and corresponding foot points of the arches are connected in a force-fitting manner to the abutments and pillar.

An arch foot maintaining device includes a plurality of supporting structures, and the supporting structure includes a base, two base supporting seats, a hydraulic jack, a roller, and a roller supporting seat. The base is a cuboid with equal length and width, a through hole running through side surfaces of the base is provided on the base. A vertical guide groove is provided on each of the two base supporting seats. The roller supporting seat is U-shaped and located between the two base supporting seats, and the roller is rotatably supported in the roller supporting seat. Two ends of a central axis of the roller are respectively located in the two guide grooves, the hydraulic jack is disposed within the base, and a top of the hydraulic jack abuts against a bottom of the roller supporting seat.

An arch foot maintaining device includes a plurality of supporting structures, and the supporting structure includes a base, two base supporting seats, a hydraulic jack, a roller, and a roller supporting seat. The base is a cuboid with equal length and width, a through hole running through side surfaces of the base is provided on the base. A vertical guide groove is provided on each of the two base supporting seats. The roller supporting seat is U-shaped and located between the two base supporting seats, and the roller is rotatably supported in the roller supporting seat. Two ends of a central axis of the roller are respectively located in the two guide grooves, the hydraulic jack is disposed within the base, and a top of the hydraulic jack abuts against a bottom of the roller supporting seat.