A bridge assembly includes a plurality of platform members which may be secured to support beams via individual platform chassis which are configured to allow tool-less attachment bolt heads thereto. A plurality of specially configured clamps are attached to the free ends of the bolts and the clamps are used to secure the platform members to the platform chassis. The platform chassis are each secured to the outer support beams via L-brackets that are mounted between the chassis and support beams. The support beams include flanged channels wherein the heads of a plurality of bolts may be attached without the need for tools. The platform members may be laid in either a parallel or perpendicular orientation with respect to the outer support beams with two different clamp styles being used depending on the orientation selected.

The present disclosure belongs to the technical field of arch bridge structures, and particularly relates to a steel-concrete combined skewback structure and a construction method thereof. In the present disclosure, by arranging arch rib tubes, concrete sections in a main chord pipe, concrete blocks in a skewback, fixing steel tubes, a transverse diaphragm unit, and a vertical diaphragm unit, the steel-concrete combined skewback structure can achieve the following objectives that 1. the skewback structure can be fully connected with a bearing platform; and 2. the fixing steel tubes are fully filled with concrete. In addition, the present disclosure further provides the construction method of the above steel-concrete combined skewback structure. The construction method the skewback structure itself and its mounting manner both have sufficient structural stability.

A partially replaceable orthotropic steel bridge deck structure is provided, including a bridge deck laid on a top of a main girder along a longitudinal direction. The bridge deck includes a heavy-vehicle lane, a medium-vehicle lane, a light-vehicle lane and an emergency lane. A top plate structure of the bridge deck includes a first top plate and a second top plate. The heavy-vehicle lane includes a first diaphragm and the first top plate. A bottom of the first top plate is connected to a longitudinal rolled U-shaped rib arranged via a blind rivet. The medium-vehicle lane, the light-vehicle lane and the emergency lane each include a second diaphragm and the second top plate. A bottom of the second top plate is welded with a longitudinal cold-formed U-shaped rib. An erection method of such orthotropic steel bridge deck structure is also provided.

A method for erecting a portion of a transportation structure including a plurality of piers, a plurality of platforms forming a service pathway, a first plurality of girders forming a first assembly of tube segments, capable of being placed under low air pressure and through which pods may travel substantially free of air friction, and forming a first rooftop transportation pathway the method including conveying with vehicle(s) the girders and platforms along the first transportation pathway, positioning them and having the vehicle(s) return along the service pathway. A portion of a transportation structure is also provided.

Provided is a carbon fiber reinforced polymer (CFRP) strengthening system with reinforcement and cathodic protection functions for a steel bridge. The CFRP strengthening system with reinforcement and cathodic protection functions for a steel bridge includes a steel beam component, a CFRP plate, clamping plate assemblies, water swellable cotton, insulating friction plates, a current stabilized power source, and a connecting lead, where the CFRP plate is provided below a lower surface of the steel beam component; clamping plate assemblies are respectively detachably connected to two ends of the steel beam component; the insulating friction plate is provided between the clamping plate assembly and a clamping contact surface of the CFRP plate; the water swellable cotton is provided between the CFRP plate and the lower surface of the steel beam component; and the current stabilized power source is provided beneath the steel beam component.

Irradiation with a laser beam is performed along a welding bead, while the laser beam is aimed, as an irradiation point of the laser beam, at a contact point between a deck plate and a U-rib that is contained in a non-welded portion of a root part, from a side of the welding bead of the root part. Thereby, it is possible to remove a crack beginning at the non-welded portion of the root part generated at a joining portion between the deck plate and the U-rib of a steel floor slab, by the irradiation with the laser beam.

Provided is an anti-collapse buffer chain for bridge that enables the prevention of stress concentration on a contact portion between rings when an impact load acts. In an anti-collapse buffer chain for bridge 1 that includes a ring linked body 2 in which a plurality of rings are linked to one another, and a covering body 3 covering a peripheral area of the ring linked body 2, and prevents a bridge upper structure, such as a bridge girder, from collapsing by linking the bridge upper structure to a bridge lower structure, such as a bridge abutment and a bridge pier, excluding a part of an end ring 21a (21b) at an end portion, the ring linked body 2 is covered with a rubber elastic body, the end ring 21a (21b) is brought into contact with an adjacent ring 22a (22b) that is adjacent to the end ring 21a (21b), and a wire diameter of a ring steel material of one or both rings of the end ring 21a (21b) and the adjacent ring 22a (22b) is set to be larger than a wire diameter of a ring steel material of another ring of the ring linked body 2.

The present disclosure provides a rear-anchored V-shaped pier of a steel structure of a three-legged star-shaped pedestrian landscape bridge and a construction method. The rear-anchored V-shaped pier of a steel structure of a three-legged star-shaped pedestrian landscape bridge is applied to a main bridge arch that includes three arch legs connected into a star shape having three legs, and includes a deck-type arch-footed V-shaped pier, where the deck-type arch-footed V-shaped pier is disposed at a rear end of each arch leg. The deck-type arch-footed V-shaped pier has a top connected to the arch leg and a bottom hinged with a pile foundation of a bearing platform pre-poured on a construction ground. A tie rod is connected between the rear end of the arch leg and the pile foundation of the bearing platform, and an anchor cable tensioning structure configured to tension the tie rod is disposed on the pile foundation of the bearing platform. The present disclosure meets requirements for mounting a large-span bridge arch on a soft soil foundation, and implements mounting effect of the large-span bridge arch.