A steel-concrete composite bridge deck slab using inverted U-shaped shear connectors and a method for constructing the same. The steel-concrete composite bridge deck slab includes a bottom steel plate and a bridge deck concrete layer, wherein inverted U-shaped perforated steel plate units are arranged on an upper surface of the bottom steel plate, and bar-mat reinforcements are arranged at upper ends of the inverted U-shaped perforated steel plate units.

A cost-effective orthotropic deck bridge panel which is capable of being standardized to facilitate the use of orthotropic decks on short span bridges. Inclusion of a concrete deck in the panel simplifies fabrication details, thereby increasing the economic viability of the disclosed orthotropic deck panel in short span bridge projects. The present disclosure also overcomes shortcomings in fabrication of steel support ribs of the panel by using a cold roll-forming process instead of a press brake to form longitudinal bends in sheet material. The cold roll-forming process further allows camber to be introduced in the support ribs, thereby eliminating an extra manufacturing step.

Disclosed are a steel girder pavement structure (100) for high-speed road for bicycle, and a roadbed pavement method therefor. The pavement structure (100) includes a top plate (10), a bottom plate (20), a web (30), stiffening plates (40), and decorative plates (50). A composite roadbed is paved on a surface layer of the top plate (10). The composite roadbed includes, from bottom to top, a substrate, a primer coating and quartz sand (101), a waterproof coating (102), an anti-slip coating and quartz sand (103), a wear-resistant coating (104) and an anti-ultraviolet coating (105). The roadbed pavement method includes: paving various layers of materials on a surface of the steel plate from bottom to top. The high-speed road for bicycle is easy to seamlessly connect to a transportation hub, and has a high comfort degree.

The present invention provides a bidirectional energy-transfer system comprising: a thermally and/or electrically conductive concrete, disposed in a structural object; a location of energy supply or demand that is physically isolated from, but in thermodynamic and/or electromagnetic communication with, the thermally and/or electrically conductive concrete; and a means of transferring energy between the structural object and the location of energy supply or demand. The system can be a single node in a neural network. The thermally and/or electrically conductive concrete includes a conductive, shock-absorbing material, such as graphite. Preferred compositions are disclosed for the thermally and/or electrically conductive concrete. The bidirectional energy-transfer system may be present in a solar-energy collection system, a grade beam, an indoor radiant flooring system, a structural wall or ceiling, a bridge, a roadway, a driveway, a parking lot, a commercial aviation runway, a military runway, a grain silo, or pavers, for example.

A connection assembly includes a first concrete member, a second concrete member, and a cap formed of a concrete material. The first concrete member has an end surface and a plurality of reinforcing bars protruding from the end surface. The second concrete member has a plurality of opening walls defining an opening extending through the second concrete member. The second concrete member is disposed on the end surface of the first concrete member with the reinforcing bars disposed in the opening. The cap is cast in the opening around the reinforcing bars and is spaced apart from each of the opening walls.

During bridge construction, a form at the upper, outer edge of a bridge's outer girder, upper flange retains concrete slurry poured on the bridge's deck. The girder is cast with extended upper flanges, and the form is precast integrally with the flange. The improved girder may eliminate the need for a construction worker walkway.

A composite structural panel for use in bridge structures, and method of manufacturing same, comprises a top panel and a bottom panel separated by and attached to at least one, but preferably a plurality, of structural composite preforms which may be fabricated by a continuous manufacturing process and may be saturated by resin using a continuous wetting process. The composite preforms may take any cross-sectional shape but are preferably trapezoidal. The top and bottom panels may be fabricated from a plurality of layers of woven fabric layers and non-woven fabric layers which are saturated with a resin that is subsequently cured using cure processes known in the art. The composite structural panel of the invention is usable as a flat structural member for use as bridge decking, ramps, trestles, and any application requiring a structural panel.

A concrete structure body includes a first concrete member having a first facing surface; a second concrete member having a second facing surface and disposed such that the first facing surface and the second facing surface face each other; a connection portion that fills a gap between the first facing surface and the second facing surface; and a tendon disposed in the connection portion to extend along the first facing surface and the second facing surface and to which a tensile force is applied in a longitudinal direction.

A concrete structure includes a first concrete member, a second concrete member, a sheath that is disposed in a through hole extending from the first concrete member to the second concrete member, a tension part that is inserted over the entire length of the sheath and that is subjected to a tensile force, a fixing tool that fixes the tension part to the first concrete member or the second concrete member, and an anticorrosion part that covers the fixing tool. The tension part includes a stranded wire part and a first cover that covers an outer periphery of the stranded wire part. A space between the sheath and the tension part is not filled with a grout material.

A connection assembly includes a first concrete member, a second concrete member, and a cap formed of a concrete material. The first concrete member has an end surface and a plurality of reinforcing bars protruding from the end surface. The second concrete member has a plurality of opening walls defining an opening extending through the second concrete member. The second concrete member is disposed on the end surface of the first concrete member with the reinforcing bars disposed in the opening. The cap is cast in the opening around the reinforcing bars and is spaced apart from each of the opening walls.