677 results about "Composite girder" patented technology

A modular reinforced structural beam and connecting member system that includes at least one composite beam having two oppositely oriented triangular closed head portions and a transversally extending web interposed between said two closed head portions, each of said beams consisting of two separate members arranged such that corresponding head portions of said two members are nested one within the other and adjacent elements of the two members are in mutual stabilizing contact. A plurality of connecting members are connected to, and are in force transmitting contact with, one of the composite beams and another structural element.

A composite thermal insulation member of building is provided. It relates to the composite thermal insulation member of the building, especially the composite thermal insulation wall body and the composite roof aimed to solve the problem of high cost of the existing energy-saving wall body and the inconvenience of construction, the first structure is the core layer bonded inside the frame with the outer protecting layer provided on the surface of the core layer and the alkali-resistant netting fabric bonded to the outer protecting layer and the load-carrying component, the second structure is the core layer provided between the indoor and outdoor outer protecting layers and bonded each other, also the steel hoop fixed with the steel bars inside the indoor and outdoor outer protecting layers, the third structure is the outer protecting layer provided on two sides of the core layer and its upper side and bonded to it, also the core layer and the steel bars arranged inside the outer protecting layer as well as the outer protecting layer wrapped and surrounded by the alkali-resistant netting fabric, the fourth structure is the composite pillar anchored to the main structure and the core layer bonded to the main structure and the light composite pillar with the composite girder supported on the composite pillar and the plastered outer protecting layer on the composite pillar, composite girder and the outer side of the core layer, the fifth structure is the core layer provided between the upper and lower outer protecting layers with the lower outer protecting layer fixed to the girder or wall of the main structure, the invention has the advantages of low cost, convenience of construction etc. which is beneficial to the energy-saving of the construction and the reform of the wall body.

The invention relates to a replaceable prefabricated combined beam structure which comprises a steel beam, prefabricated concrete plates and high strength bolt connectors. The prefabricated concrete plates are located on upper wing edge plates which are parallelly arranged on the steel beam, and adjacent prefabricated concrete plates in a span direction are connected through an external prestressing tendon; lower holes corresponding to the high strength bolt connectors are formed in the upper wing edge plates of the steel beam, reserved holes corresponding to the connectors are formed in the prefabricated concrete plate, and the high strength bolt connectors are connected through the reserved holes and the lower holes from top to bottom. The invention also provides a manufacturing process of the replaceable prefabricated combined beam structure. The invention provides the replaceable prefabricated combined beam structure which is simple to construct and relatively high in assembling efficiency, and the manufacturing process.

A PSSC complex girder in which a section shape steel structure is formed by joining one or more section shape steel. The PSSC complex girder includes a tension means for tensioning the section shape steel structure with a tensional member so that the structure has a predetermined camber. Concrete is poured in an inner space portion of the section shape steel structure. A strengthening plate for supporting buckling and compression is joined to the section shape steel. A sheer prevention member and steel reinforcement are joined to the section shape steel and the concrete is poured therein. The camber of the PSSC complex girder can be adjusted before or after construction for new bridges and conventional bridges. Deflection of the slab can be easily decreased and cracks caused by flexural deformation can be prevented.

The invention relates to a main girder of a steel box composite girder with long cantilever arms for a single-plane cable stayed bridge. The two sides of a steel box girder in the middle of the main girder are respectively provided with a steel cantilever arm, and the steel box girder and the steel cantilever arms are connected by high strength bolts in bolting and welding modes; and the end part of each steel cantilever arm is provided with a longitudinal side beam, the tops of the steel box girder and the steel cantilever arms are paved with concrete bridge decks or cast-in-situ bridge decks, traffic lanes are arranged on the steel cantilever arms, the steel box girder is in a single-box single-chamber structure or multi-chamber structure, and a steel anchor box is arranged at the anchor point of a stayed cable. By adopting the steel box composite girder with long cantilever arms, the stress problems of the main girder, such as the torsion resistance and the like of the single-plane cable stayed bridge, are solved, and the horizontal dimension of the main girder is reduced; the main girder can be transported to the bridge location to carry out erection and installation, thereby solving the problem that the sectional dimension of the appearance is limited; and because most of the components of the main girder are prefabricated ones, the in-situ workload is reduced, and the construction quality and construction period can be effectively guaranteed. The main girder provided by the invention is specially adapted to the construction conditions in severe cold districts, for example, the main girder is applied to the construction of the Wusu Bridge in HeiXiazi Island of Heilongjiang Province, and achieves a good application effect.

The invention discloses a secondary tensioning prestressed assembly-type corrugated steel web composite beam. The composite beam comprises a composite beam unit which is formed in a way that a plurality of prefabricated corrugated steel web beam bodies are connected, each prefabricated corrugated steel web beam body comprises a corrugated steel web, a concrete top plate and a concrete base plate, the concrete top plate is connected with the corrugated steel web through an upper connecting piece, and the concrete base plate is connected with the corrugated steel web through a lower connecting piece; the transverse connecting end of each of the concrete top plate and the concrete base plate is provided with a transverse connecting steel bar, vertical connecting steel bars are arranged in the concrete top plate and the concrete base plate in balance, primary tensioning prestressed channels and secondary tensioning prestressed channels are arranged in the concrete base plate symmetrically, primary tensioning prestressed steel beams are arranged in the primary tensioning prestressed channels in a penetrating manner, and secondary tensioning prestressed steel beams are arranged in the secondary tensioning prestressed channels in a penetrating manner. The invention also provides a construction method of the composite beam. According to the invention, the prestressed steel beams are tensioned twice, inflected arch phenomena, of the prefabricated corrugated steel web beam bodies, caused by concrete shrinkage and creep can be reduced, the erection precision of the bridge is improved, and the usage performance of the prestressed assembly-type corrugated steel web composite beam can be improved.

Disclosed herein are a prestressed composite girder with steel plates, a continuous prestressed composite girder structure with steel plates and methods of fabricating and connecting the same. The prestressed composite girder includes shear reinforcing bars and main reinforcing bars, sheaths, sole plates, and steel plates. The shear reinforcing bars and main reinforcing bars are arranged across the prestressed composite girder. The sheaths are adapted to contain steel wires arranged across the prestressed composite girder. The sole plates are placed at ends of the prestressed composite girder and provided with shear connecting members. The steel plates are placed in upper and lower flanges of the prestressed composite girder and provided with shear connecting members.

The invention discloses a method for the secondary combination of a deck slab and a steel girder for an entire hole prefabricated steel-concrete combined continuous box girder, which comprises the following steps: firstly, performing the primary combination of the deck slab and the steel girder for the middle section of a composite girder in a precast field, wherein two ends of the composite girder are not combined with the deck slab; secondly, erecting the composite girder to the top of a bridge site pier through the transportation of a large floating crane, and finishing the concrete casting for a bottom plate of a dual-combination section between composite girder supporting point composite girders by a supporting point roof fall girder method after the composite girder is erected and simple beams are arranged continuously; and thirdly, performing the secondary combination of the deck slab and wet joint seam steel-concrete on the two ends of the composite girder to achieve the secondary combination of the deck slab and the steel girder. The method avoids limitations for the erection of the steel girder of the composite girder by adopting an incremental launching method to construct a large-span composite girder, reduces time-consuming, laborious and costly temporary rest piers to be constructed on a temporary support for segmental hoisting construction, and reduces the cumbersome segmental transportation of the steel girder.

Provided is a pre-tensioned prestressed composite beam, which is an I-shaped beam composed of H-shaped steel and concrete, the web plate of the H-shaped steel is provided with trapezoidal holes (14) at intervals, the upper flange and the lower flange of the H-shaped steel are welded with shearing nails, the outer periphery of the lower flange is enclosed with concrete to form a steel-concrete lower flange (4), and the inside of the steel-concrete lower flange is embedded with prestressed steel twisted wire by pretensioning method. The manufacturing method of the composite beam is that: a steel plate is cut into two tooth-shaped plates along tooth-shaped line to be respectively as the trapezoidal hole plates of the H-shaped steel flange, the trapezoidal hole plates are welded with steel plates to form the web plate, the web plate is welded with the upper flange and the lower flange to form the H-shaped steel (1) having trapezoidal holes, the H-shaped steel is put on a base surface with the lower flange downward, the two sides of the lower flange are provided with side molds, a stirrup (7) is arranged and steel twisted wires (3) are longitudinally fastened between the two side molds, the steel twisted wire is tensioned to tensioning state, the concrete for enclosing the H-shaped lower flange is poured and tamped between the two side molds, the steel-concrete lower flange (4) is formed after demolding, and the steel twisted wire at tensioning state is loosened after the concrete reached to predetermined strength and is cut off at predetermined position. The invention is suitable for beams of buildings.

The invention relates to a partial filling type steel box concrete continuous composite girder bridge and a construction method thereof. The construction method comprises the following steps of (1) erecting steel box continuous girders; (2) filling concrete in a middle support area portion; (3) pouring a first reinforcement concrete bridge deck in a midspan area; and (4) pouring a second reinforcement concrete bridge deck in the middle support area. By the method, the deck of the bridge is subjected to section construction, so that the anti-cracking ability of the reinforcement concrete bridge deck of the middle support area is improved, the bridge deck of the midspan area is assembled after being subjected to a pouring procedure, tensile stress cannot be generated in the bridge deck of the middle support area which is subjected to the pouring procedure later by the weight of the bridge deck of the midspan area, and the anti-cracking ability of the reinforcement concrete bridge deck of the middle support area is improved.

The invention relates to an ultra-low frequency acoustic transducer comprises a first grade bending girder, a second grade bending girder, a first projection, and a second projection, the first and the second projection are provided on an inner wall of the first grade bending girder, a T-shape quality yoke is arranged between the two projections and composes a composite girder bending-opening shell together with the first grade bending girder, a bow-shape closed curved face is composed by the first grade bending girder and the second grade bending girder and has a sturcture of symmetrical upper and lower portions, both two end faces of a translation body are not closed; a driving member, a first transition block and a second transition block compose an inner chamber assembling unit of the transducer, the size of the assembling unit in a length direction is larger than a distance between the projections and the T-shape quality yoke; the first transition block and the second transition block are arranged at two outer side of the driving members of each assembling unit, respectively, at least a driving member and the transition blocks arranged at left and right sides of the driving member are mounted between the first grade bending girder and the T-shape quality yoke. The transducer of the invention has a structure format which is better for realizing an ultra-low frequency and high power radiation.

The invention discloses a prefabricated building main body structure, and relates to the technical field of constructional engineering structures. The prefabricated building main body structure comprises an independent foundation; at least one layer of floor slabs is fixedly arranged above the independent foundation; a supporting structure is arranged under each layer of the floor slabs; a roof frame structure is fixedly arranged above the top layer of the floor slabs; the floor slabs comprise a plurality of combination beam plates; the supporting structure of each layer comprises a plurality of square pipe columns; tenon pipes connected with the combination beam plates in an inserting manner are arranged on the square pipe columns; a stairway is arranged between every two vertically adjacent layers of floor slabs; the combination beam plates comprise four-corner components; steel beams are fixedly connected between the adjacent four-corner components; the upper edges of the steel beams are spaced from the top ends of the four-corner components by a certain distance; concrete slabs are poured on the steel beams; reinforcement meshes are arranged in the concrete slabs; reserved pipeline holes are formed in the side surfaces of the steel beams; and the four-corner components are sleeves matched with the tenon pipes in an inserting manner. The beam and column connection is reasonable, the mounting is convenient and the flexural capacity is high.

The invention relates to a method for setting a longitudinal stiffening rib of a high web of an elastic rotation constrained boundary steel-concrete composite beam. The method comprises the following steps: firstly building a displacement function equation with the elastic rotation constrained boundary and the boundary condition, deriving buckling stress calculation expression of the stiffening rib under two states of the rigid stiffening and flexible stiffening based on an energy method, and obtaining a calculation formula of the elastic rotation constrained boundary longitudinal stiffening rib critical rigidity; and then, considering external work and a minimum potential energy principle, presenting a critical buckling stress calculation formula of a non-uniform pressing plate under the elastic rotation constrained boundary; and finally, according to a buckling safety degree equal principle, obtaining the optical position of setting the longitudinal stiffening rib under the elastic rotation constrained boundary. The method is capable of, according to the actual stress situation, accurately setting the longitudinal stiffening rib of the high web of the steel-concrete composite beam, solving the problems of the current steel-concrete composite bridge bream stiffening rib that the design is conservative and the amount of the steel products is large, and remarkably improving the rationality and economy of the stiffening rib setting of the high web.

The invention discloses a manufacturing method for a composite profile steel-concrete combined beam, the combined beam and a monitoring device. The composite profile steel-concrete combined beam comprises a reactive powder concrete (RPC) flange plate. The lower surface of the RPC flange plate is fixedly connected with an I-steel beam through shear connecting pieces. A plurality of grooves are formed in the central line of the upper surface of the upper flange of the I-steel beam in the span direction. A piezoelectric ceramic piece is fixed into each groove. Piezoelectric smart aggregate is embedded into the portions, on the two sides of the shear connecting pieces, of the RPC flange plate, and the lower surface of the aggregate smart aggregate is flush with the lower surface of the RPC flange plate. By adoption of the manufacturing method for the composite profile steel-concrete combined beam, the combined beam and the monitoring device, the span of the profile steel-concrete combined beam is increased, mechanical performance of the profile steel-concrete combined beam is improved, and therefore the profile steel-concrete combined beam can be used for the newly-built construction of a civil engineering structure. The monitoring device is high in sensitivity, rapid in response, easy and convenient to operate, low in price and capable of being applied to slipping monitoring of the composite profile steel-concrete combined beam.

The invention discloses an ultra-high performance concrete composite beam bridge deck slab wet joint continuous structure with a template, which comprises a prefabricated section, a wet joint sectionand a steel bottom template; the prefabricated section bridge deck slab is made of an ultra-high performance concrete material; the steel bottom template is an extension section of the prefabricated section bridge deck slab bottom template, butt welding is conducted in the middle of the wet joint, and the steel bottom template serves as a bottom template of the wet joint section; the wet joint section is supported on the steel bottom template and connected with the steel bottom template and the prefabricated section in a pouring mode, the wet joint section is laid continuously, the thickness of the wet joint section is equal to that of the bridge deck slab, and the wet joint section is made of ultra-high performance concrete materials the same as those of the bridge deck slab. The wet joint is provided with the template, is high in tensile strength and compressive strength and good in durability, can effectively guarantee the performance continuity of the ultra-high performance concrete at the wet joint interface, has the advantages of being effective in steel bar connection, convenient to construct and easy to maintain, and can solve the problem of the connection quality of the ultra-high performance concrete wet joint.

The invention discloses a carbon fiber fabric reinforced resin matrix composite girder cap for a fan blade and a manufacturing method thereof. The carbon fiber fabric reinforced resin matrix composite girder cap is composed of a carbon fiber stitch-bonded fabric reinforcing material and a glycidyl ester epoxy resin system. The requirements for laying efficiency and pouring efficiency of a vacuum absorption process are met, the requirement of the girder cap for carbon fiber dynamic performance utilization is well taken into consideration, and mechanical performance of a carbon fiber stitch-bonded fabric composite and structural strength of the carbon fiber fabric reinforced resin matrix composite girder cap are remarkably improved. By means of the vacuum absorption process and a solidification rule that process auxiliary materials are removed after medium-and-low-temperature pre-solidification and then medium-and-high-temperature solidification is carried out, the hidden risk that the process auxiliary materials are not resistant to medium and high temperature is overcome, and structural mechanical performance of the girder cap is effectively guaranteed.

The invention relates to a shear wall, in particular to a steel truss-steel plate combined shear wall and a manufacturing method thereof. The shear wall comprises a frame beam, a frame pillar fixedly combined with the frame beam and a steel plate arranged between the frame beam and the frame pillar; wherein, the frame beam comprises a profile steel beam and concrete poured outside the profile steel beam to form a profile steel-concrete compound beam; the frame pillar is a profile steel-concrete pillar composed of the profile steel and the concrete poured outside the profile steel; the profile steel in the profile steel-concrete pillar is fixedly connected with the steel plate and the profile steel beam in the frame beam; a profile steel raking prop is fixedly combined on the plane of the steel plate along the oblique direction, and is distributed in a herringbone, an X shape or a reverse V shape. The profile steel beam, the profile steel-concrete pillar, the profile steel raking prop and the steel plate are combined with each other to form a steel truss-steel plate combined structure. Compared with the existing shear wall, the steel truss-steel plate combined shear wall has higher initial rigidity and carrying capacity, slower attenuation of carrying capacity and rigidity, better whole shakeproof and energy consumption performance as well as comparatively stable later period shakeproof performance, and can effectively relieve the damage caused by cutting and gliding at the bottom.

The invention discloses a fiber reinforced composite material rib and concrete composite beam which comprises fiber reinforced composite material ribs and concrete wrapping the peripheries of the fiber reinforced composite material ribs. The concrete wrapping the peripheries of the fiber reinforced composite material ribs in a composite beam stress area is an engineering cement-based composite. According to the composite beam, the reinforcing steel bar consumption is lowered, and the structural durability is high.

The invention relates to a bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge and a construction method thereof and belongs to a novel bridge structural system applied to a continuous composite girder bridge or a composite rigid frame bridge. The bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention is composed of super-high-performance concrete, ordinary concrete and steel beams. According to the ridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention, shear-resisting connection components and upper concrete plates are connected with each other so as to form an integrated body and work jointly, and therefore, the strength and rigidity of the bridge can be improved, and the quantity of steel consumption of the whole bridge can be decreased. The bridge deck slab longitudinal unequal strength steel-concrete composite structure bridge of the invention has respective advantages of an ordinary composite bridge deck system and super-high-performance concrete, and the advantages of high strength, high rigidity, excellent anti-cracking performance, high durability, easiness in construction and the like, and has a broad application prospect in composite structure bridges on which negative moment regions exist, such as a continuous girder bridge and a rigid frame bridge.

The invention belongs to the field of structural engineering of civil engineering and particularly relates to a combined flat beam which structurally comprises a steel beam, pressing steel plates, concrete and shear reinforcements, wherein the steel beam is inverted T-shaped and composed of a steel beam bottom flange and a steel beam web; the upper part of the steel beam web is provided with saw toothed shear connectors; the pressing steel plates are placed on the steel beam bottom flange; the concrete is poured in a closed space formed by the steel beam, the pressing steel plates and end sealing plates; the shear reinforcements are arranged among the saw toothed shear connectors, and one or more shear reinforcements can be placed in each interval. The combined flat beam is greatly shorter than a traditional combined beam, so that the cost in structure, maintenance, equipment and labor is also reduced; the steel beam is coated with concrete, so that the fire-resistant performance of the combined structure is greatly improved, effective transmission of shearing force between steel and concrete is ensured, the construction technology is simplified, and excellent economy is realized.

The composite girder partially reinforced with carbon fiber reinforced polymer is a composite steel-concrete beam partially reinforced with a sheet of carbon fiber reinforced polymer bonded to a concrete slab secured to a flange of the steel beam by shear studs, the sheet of CFRP extending across the length and width of the negative moment region of the beam. The negative moment region may be centered about a point of interior support of the composite steel-concrete beam. The carbon fiber reinforced polymer may have a thickness of about 0.25 mm.

The invention relates to a separate double-deck cable-stayed bridge, which is characterized by comprising an upper layer of main girders, a lower layer of main girders, a main tower simultaneously connected to the upper layer and the lower layer of main girders and a main tower foundation under the main tower, wherein the upper layer of main girders is provided with an upper layer of the bridge surface, the lower layer of main girders is provided with a lower layer of the bridge surface, the upper layer or the lower layer of main girders are respectively provided with stay cables to connect to the main tower. The upper layer and the lower layer of main girders respectively adopt steel box girders, concrete box girders or composite girders according to needs, which reduces steel usage quantity, obtains good sight line of the lower layer of the bridge surface, avoids the steel girder bars disturbance on the driving sight line, and facilitates the operation management and maintenance. The invention provides a double-deck bridge design which is totally different from the steel girder stiffening system, has high application value in aspects of utility, economy, bridge appearance, driving comfort and the like, and has potential application for future projects of the same kind.