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Grand And Magnificent Steel Arch Bridge Solid Shot Blasting Surface Finish

Categories Steel Arch Bridge
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: Steel Arch Bridge
Bridge Deck: Concrete Deck
Material: Prefabricated Steel
Surface Finish: Shot blasting ,painted
Type: Upper bearing type, Middle bearing type, Lower bearing type
Application: Highway, Railway, Pedestrian Bridge
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    Grand And Magnificent Steel Arch Bridge Solid Shot Blasting Surface Finish


    Instrction:


    The main structural form of steel arch bridge


    The upper structure of steel arch bridge is mainly composed of arch ring, suspension rod (or arch column), tie rod, bridge beam and other components.


    Arch Shape: Steel arch bridges are characterized by their arch-shaped structure, which provides strength and stability. The arch shape allows the bridge to distribute the load of the bridge and its traffic forces to the abutments or piers at the ends of the bridge. The arch transfers the load primarily in compression, which is a highly efficient way to resist forces.


    1. According to the structure of the form of classification:

    (1) According to the section form of the main arch ring, it is divided into: steel box arch, steel pipe arch, steel truss arch.

    (2) According to the position of the carriageway system, it is divided into: upper bearing type, middle bearing type and lower bearing type arch bridge.

    (3) According to the space posture of the two arch ribs: parallel arch ribs, basket arch ribs, butterfly arch ribs.

    (4) According to the layout of the boom classification: parallel vertical boom, inclined boom, mesh boom.


    According to the structural system classification

    Steel arch bridges have both composite system arch bridges and simple system arch bridges. There are several kinds of combined system arch bridges, such as tie arch, loser arch, lange arch and other combined system arch bridges.


    (1) Simple system arch bridge: only the arch ring is the main force component, and the simple system is a thrust arch structure, and the thrust of the arch is directly borne by the pier or foundation.

    (2) Combined system arch bridge: carriageway beam and arch combination, common force.



    Main arch structure

    Steel arch can be designed into truss arch, box arch, plate arch. Many truss arch bridges are built in foreign countries, and more than ten steel box arch bridges are built in China. Truss arch bridge is an important form of rigid arch bridge with large span.

    The main arch of truss arch bridge along the span direction: equal height, variable height.


    The overall design parameters of long-span steel truss arch bridge are:

    ① Layout of arch rib truss.

    ② Arch axis.

    ③ Vector span ratio.

    ④ The selection of the height of the vault and arch foot.

    ⑤ Boundary conditions.

    ⑥ Bar section form.

    ⑦ Bar section area.


    Trussed arch rib can be divided into Pratt truss, Warren truss, K truss, sub-truss and other forms according to the main truss frame classification.

    The mechanical properties of K-type truss are the best.

    Structural construction and aesthetics, P-type truss has advantages.

    Economical, W-type truss with the least amount of steel.


    Features of Steel arch bridge


    Arch Shape: The most prominent feature of steel arch bridges is their arch-shaped design. The arch shape provides inherent strength and stability by efficiently transferring the load from the bridge deck to the abutments or piers at the ends of the bridge.

    The steel arch has magnificent appearance, large span capacity and high carrying capacity. The maximum span of steel arch bridge is 552m which has been built.


    First, the structural characteristics of the main components of steel arch bridge.



    1. Arch rib

    The main load-bearing members of the structure mainly bear axial pressure, but also bear part of the bending moment, and the eccentric compression members are mainly compressed.

    According to the form of section is divided into: box, pipe, truss type.

    Trussed arch rib has light weight, greater span capacity and good economy.


    2. Boom

    It is a force transfer component, which transfer the deck load to the arch rib of the bearing member, the boom is mainly an axial tension member. The rigid boom is made of multi-purpose steel pipe or section steel and can withstand pressure. The flexible boom is made of high-strength steel wire bundle or steel strand, which can only be stretched, convenient construction and beautiful appearance.


    Elevation arrangement of the boom

    Boom spacing is the span length of the longitudinal beam of the carriageway, and it usually takes equal spacing.

    According to its layout in the arch plane, the boom is divided into: parallel vertical boom, inclined boom, mesh boom.

    According to the placement quantity the boom is also divided into single boom, double boom.



    3. Tie bar (beam)

    For the non-thrust arch, the thrust of the arch is borne by the tie rod, and the tie rod bears the larger axial tension.

    Divided into: rigid tie rod, flexible tie rod.




    4. Cross brace

    In order to ensure the transverse stiffness and stability of the two arch ribs and withstand the transverse horizontal forces acting on the arch ribs, bridge deck and boom, it is necessary to set the transverse supports.

    The cross brace can greatly improve the out-of-plane stiffness and torsional stiffness of the whole bridge, but basically do not improve the in-plane stiffness.


    Basic requirement

    It is arranged on the arch section outside the scope of the clearance height of the bridge floor.

    The structural form of the cross brace:

    The common ones are "one-word brace", "K-shaped brace", "X-shaped brace", "meter-shaped brace".

    The position of the cross brace corresponds to the position of the lifting point, and is symmetrical to the odd arrangement of the arch roof.

    The width of the brace should not be less than 1/15 of the length.

    The arch is generally set up "one-word support", and the arch ribs near 1/4L are generally set up "K-shaped support".

    The long span wide bridge is usually equipped with "meter-shaped supports" on the arch roof and "K-shaped supports" on both sides.



    5. Arch post


    The stand column is used for the upper bearing part of the upper bearing arch bridge or the middle bearing arch bridge, and is the force transfer structure between the bridge floor system and the main arch rib.


    Second, the overall design parameters of arch rib


    The main design parameters of long-span steel truss arch bridge are as follows: beam span ratio, selection of arch axis, choice of vault and arch height.


    Rise span ratio

    Mainly according to the topography of the bridge site, geological conditions, bridge clearance requirements and other factors to determine.

    The common range of arch rib span ratio is 1/4~1/7, the span ratio of steel truss arch bridge is usually 1/4~1/5.

    The smaller the span ratio is, the greater the horizontal thrust of arch foot is. When geological conditions are poor, a larger vector to span ratio can be used to reduce horizontal thrust.


    Arch rib vault and arch foot height selection

    According to the variation of arch rib height, it can be divided into equal height arch rib and variable height arch rib.

    When the span is large, the variable height arch rib is used to adapt to the internal force distribution of arch rib and save the engineering amount.


    Axis of arch

    The ideal arch axis is consistent with the pressure line on the arch, and the section only bears the pressure without bending moment, which can make full use of the material strength.

    Common forms of arch axis: arc line, quadratic parabola, catenary.


    Applications of steel arch bridge:


    Pedestrian Bridges: Steel arch bridges are also popular for pedestrian bridges. Their elegant arch shape not only provides a safe and stable passage for pedestrians but also adds visual interest to parks, urban areas, or scenic locations.

    Railway Bridges: Steel arch bridges have been used for railway bridges, especially for spans that exceed the capabilities of other bridge types.


    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 SPANS10M TO 300M Single span
    CARRIAGE WAYSINGLE LANE, DOUBLE LANES, MULTILANE, WALKWAY, ETC
    LOADING CAPACITYAASHTO 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 GRADEEN10025 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.
    CERTIFICATESISO9001, ISO14001, ISO45001, EN1090, CIDB, COC, PVOC, SONCAP, etc.
    WELDINGAWS D1.1/AWS D1.5
    AS/NZS 1554 or equivalent
    BOLTSISO898, AS/NZS1252, BS3692 or equivalent
    GALVANIZATION CODEISO1461
    AS/NZS 4680
    ASTM-A123,
    BS1706
    or equivalent






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