Specifications
Brand Name :
EVERCROSS
Model Number :
COMPACT-200; COMPACT-100; CHINA 321 ; PB 100; LSB; GWD; DELTA; 450,etc
Certification :
CNAS; COC; PVOC; SONCAP; CIDB;FORM E;FORM L; FORM M, etc
Place of Origin :
China
MOQ :
negotiation
Price :
1000USD ~ 2000USD Per ton
Payment Terms :
L/C, D/A, D/P, T/T, Western Union, MoneyGram
Delivery Time :
negotiation
Packaging Details :
According to detailed order
Product Name :
Composite beam bridge
Bridge Deck :
Concrete
Material :
Prefabricated Steel
Spans :
Small Spans, Medium Spans, Large Spans
Durability :
Long-lasting
Installation :
Easy and efficient installation process
Description

Composite Beam Bridge Truss Bridge Light Weight Railway Bridge

Composite beam bridge Description:

Composite beam bridge, it refers to a composite structural beam bridge which combines steel members such as steel plate beams, steel box beams, steel truss beams and reinforced concrete members to work together by using shear connectors.

The composite beam bridge is also a kind of assembled bridge span structure, which separates the beam rib part of the bridge from the bridge panel (wing plate) through the longitudinal horizontal joint, so that the overall section of the single beam becomes the combined section of the plate and the rib. During construction, beam ribs are first erected, prefabricated panels are installed (sometimes with slightly bent panels to save steel bars), and finally a portion of concrete is cast in place within the joints or along with the panels to make the structure a whole. Therefore, the composite beams are stressed in stages.

The increase of the amount of concrete in beam ribs leads to the unfavorable increase of dead load. Below picture shows the comparison of stress graphs between the prefabricated T-beam and the composite beam at two stages: permanent action Mg and variable action Mp.

Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

According to the materials used in the plates and ribs of the composite beams, the composite beams are divided into concrete composite beams and steel-concrete composite beams. The composite concrete beams are integrated by casting concrete in situ in the joints or together with the precast slab of the bridge floor. Steel-concrete composite beams are made of steel beams in the beam ribs and reinforced concrete slabs in the bridge panels, which are combined with each other through shear keys (also known as connectors) to participate in the structural force.

Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

2. Structural characteristics of composite beam bridge

The section is a combination section.

The section stiffness increases to reduce the quantity of steel.

Under the action of live load, the noise is less than that of all steel beam bridge.

Easy to adjust slope and external superelevation.

In order to ensure the joint force of steel beam and reinforced concrete road slab, a reliable shear transfer device must be set up to transfer the staggered shear force of the beam in bending deformation.

Rigid shear transfer.

Adopt short section steel, such as channel steel, angle steel.

Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

Flexible shear transfer

Diagonal reinforcement, if reliable, can also be used in other forms such as capped bolts.

The shear transfer shall be welded to the upper flange of the steel beam and welded to the steel bar of the bridge panel.

The structural form of composite beam bridge:

Composite plate girder bridge

For medium and small span composite girder Bridges, in order to reduce the production and installation costs, it usually use steel beams with I-section which also known as composite plate girder bridges.

The steel beams of composite plate girder bridges can be made of rolled section steel or welded steel beams.

It can adopt an asymmetric steel beam section to reduce the size of the upper steel beam flange attached to the concrete bridge panel.

Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

Composite box girder bridge

The box-type composite beam bridge has higher torsional rigidity and more stability than the I-section composite bridge.

Increase the crossing capacity, solve the problem of insufficient clearance under the bridge and avoid the interruption of traffic during construction.

Before concreting the bridge floor, concrete can be poured over the steel box girder bottom plate in the negative bending moment zone, which can not only play the role of compressive resistance, but also improve the stability of the steel box girder bottom plate and web plate.

Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

Material Combination: The combination of steel and concrete in a composite box girder bridge provides distinct advantages. The steel component provides high tensile strength and stiffness, while the concrete component contributes compressive strength and protection. This combination results in a lightweight yet robust structure that can efficiently carry heavy loads and span long distances.

Longitudinal Stiffeners: To enhance the stiffness and stability of the box girder, longitudinal stiffeners are often incorporated. These are typically steel plates or sections that are attached to the inner surfaces of the top and bottom slabs. Longitudinal stiffeners increase the resistance to bending and torsion, improve load distribution, and reduce deflections.

Composite truss bridge

Steel truss is used instead of solid steel beam and combined with concrete bridge panel.

It has better permeability and aesthetics.

Composite truss bridges are commonly used in various infrastructure projects, including highway bridges, railway bridges, and pedestrian bridges. Their combination of strength, efficiency, and long-span capabilities makes them suitable for addressing challenging bridge design requirements while ensuring durability and cost-effectiveness.

Composite rigid frame bridge

Steel-concrete composite beams are consolidated with concrete piers or composite piers. Reduce the load of bridge floor system and reduce the use of support.

Large headroom under the bridge, beautiful shape, good smoothness of the bridge floor. Compared with the simple supported beam bridge, its seismic performance is higher, and no falling beam accidents will occur.

The key problem to be solved in the design and construction is to ensure that the load of the bridge floor can be effectively transferred to the pier namely the structure of the beam-squat joint.

Steel beams are mainly subjected to tension in composite beams. For small and medium span steel-concrete composite beam bridges, steel plates are generally welded into I-shaped (I-shaped) steel beams. In order to give full play to the role of steel, I-shaped steel beams often use asymmetric cross sections with wide lower flanges. For steel-concrete composite beam bridges with large span, the cross-section form of closed or open steel box girder is mostly used, so it is also called box composite beam.

Steel-concrete composite beam bridge is a new type of bridge structure developed on the basis of steel structure beam bridge and concrete structure beam bridge.

Compared with the simple steel beam, it can reduce the use of the amount of steel, save the painting cost of the steel structure, reduce the noise pollution of the steel bridge, and increase the stiffness, stability and integrity of the structure.

Box-shaped composite beams have high torsional stiffness, which is especially suitable for curved bridges, and most of them are designed as continuous structures in the direction of the bridge.

Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

Reinforced concrete bridge panels supported by steel beams, in addition to the longitudinal bending moment shared by the upper flange of the composite beam and the steel beam. It also bears the internal forces in the direction of the cross bridge caused by local loads as the bridge panel. The bridge panel usually adopt two forms of cast-in-place concrete slabs and precast concrete slabs, and the bottom surface of the bridge panel can be designed in a straight or curved shape.

Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

The shear key on the top surface of the flange plate on the steel beam is the basis for the joint operation of the steel beam and the concrete bridge panel. The main function of the shear bond is to withstand the longitudinal shear force on the interface between the steel beam and the concrete bridge panel, and resist the relative slip.

There are many kinds of shear keys used in composite beams. In the current "Code for Design of Highway Steel Structure Bridges" (JTG D64), welded nail shear keys, channel steel shear keys and perforated plate connectors are adopted, as shown below, among which welded nail shear keys are the most widely used.

Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

Calculation characteristics of composite beams:

Scaffold construction: The overall section of the superimposed beam bears all the loads, and the section stress should be calculated according to the overall section of the superimposed beam.

Direct use of steel beams to support formwork and concrete.

In the first stage, the first part of the dead load (including steel beams, formwork, concrete and their construction equipment weight) is borne only by steel beams.

In the second stage, the second part of the dead load (including the bridge deck pavement layer, waterproof layer, road surface) and the live load are borne by the overall section composed of reinforced concrete slabs and steel beams, and finally superimposed to check the strength of the composite beam section.

Advantages of composite beam bridge:

Convenient for construction. Because of the strength of steel rod, light weight, easy to set up.

Alleviate the dead load. Compared with concrete bridges, the dead load is light, which is especially important for long-span beam Bridges, which can reduce the proportion of dead load and reduce the requirements on the lower structure and foundation.

Improve performance. By steel tensile, concrete compressive, give full play to the performance of the material. When concrete filled steel tube is used, the hoop effect of steel tube on concrete can be used.

Save cost. In long-span Bridges, it is a little more obvious.

Application of composite beam bridge:

Highway bridge and railway bridge.

Pedestrian Bridges: Composite beam bridges are commonly employed in the construction of pedestrian bridges. These bridges provide safe passage for pedestrians and cyclists over roads, rivers, railways, or other obstacles. The lightweight nature of composite beams allows for the creation of aesthetically pleasing and visually appealing pedestrian bridge designs.

Highway Bridges: Composite beam bridges are widely used in the construction of highway bridges. They provide efficient and cost-effective solutions for spanning long distances and carrying heavy loads. These bridges are essential for road networks, allowing for the smooth flow of traffic over highways, expressways, and interchanges.

Evercross Steel Bridges Overview:

EVERCROSS STEEL BRIDGE SPECIFICATION
EVERCROSS
STEEL BRIDGE
Bailey bridge (Compact-200, Compact-100, LSB, PB100, China-321, BSB)
Modular bridge (GWD, Delta, 450-type, etc.),
Truss Bridge, Warren bridge,
Arch bridge, Plate bridge, Beam bridge, Box girder bridge,
Suspension bridge, Cable-stayed bridge,
Floating bridge, etc.
DESIGN SPANS 10M TO 300M Single span
CARRIAGE WAY SINGLE LANE, DOUBLE LANES, MULTILANE, WALKWAY, ETC
LOADING CAPACITY AASHTO HL93.HS15-44, HS20-44, HS25-44,
BS5400 HA+20HB, HA+30HB,
AS5100 Truck-T44,
IRC 70R Class A/B,
NATO STANAG MLC80/MLC110.
Truck-60T, Trailer-80/100Ton, etc.
STEEL GRADE EN10025 S355JR S355J0/EN10219 S460J0/EN10113 S460N/BS4360 Grade 55C
AS/NZS3678/3679/1163/Grade 350,
ASTM A572/A572M GR50/GR65
GB1591 GB355B/C/D/460C, etc.
CERTIFICATES ISO9001, ISO14001, ISO45001, EN1090, CIDB, COC, PVOC, SONCAP, etc.
WELDING AWS D1.1/AWS D1.5
AS/NZS 1554 or equivalent
BOLTS ISO898, AS/NZS1252, BS3692 or equivalent
GALVANIZATION CODE ISO1461
AS/NZS 4680
ASTM-A123,
BS1706
or equivalent




Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge



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Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

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Brand Name :
EVERCROSS
Model Number :
COMPACT-200; COMPACT-100; CHINA 321 ; PB 100; LSB; GWD; DELTA; 450,etc
Certification :
CNAS; COC; PVOC; SONCAP; CIDB;FORM E;FORM L; FORM M, etc
Place of Origin :
China
MOQ :
negotiation
Price :
1000USD ~ 2000USD Per ton
Contact Supplier
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Composite Beam Steel Rigid Frame Bridge Truss Bridge Light Weight Railway Bridge

EVERCROSS BRIDGE TECHNOLOGY (SHANGHAI) CO.,LTD.

Verified Supplier
2 Years
shanghai, shanghai
Since 2005
Business Type :
Manufacturer, Trading Company, Seller
Total Annual :
50 Million-80 Million
Employee Number :
120~150
Certification Level :
Verified Supplier
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