Efficient Construction Process Steel Truss Bridge For Railway Transportation

Steel Truss Bridge Description:
Introduction of the steel truss bridge:

The steel truss bridge is a structural system between beams and arches.Steel truss bridges are a significant and widely utilized type of bridge in the field of civil engineering. They possess a unique structure and a host of remarkable characteristics. It is a structure in which a bent upper beam structure and a pressure-bearing lower column are integrated together. Due to the rigid connection between the beam and the column, the beam is unloaded due to the flexural rigidity of the column. The entire system is a compression-bending structure as well as a thrust structure.

According to the different position of the bridge floor, it is divided into upper bearing steel truss bridge that the bridge floor is located in the upper part of the main truss and lower bearing steel truss bridge which the bridge floor is located in the lower part of the main truss.

The structure composition of rigid truss beam bridge: Main girder, Bracing, Bridge deck system, Bridge floor



In terms of structural components, a steel truss bridge mainly consists of trusses, which are composed of upper chords, lower chords, vertical members, and diagonal members. The upper and lower chords bear the majority of the bending moment, acting as the main load-bearing elements. The vertical members and diagonal members work together to transfer forces, ensuring the stability and integrity of the overall structure. These components are typically fabricated from high-strength steel, which provides excellent mechanical properties to withstand heavy loads.

(1) Main girder

It is the main load-bearing structure and bears vertical loads.

The main truss is composed of upper chord, lower chord and belly rod. The belly bar is divided into diagonal bar and vertical bar.

Nodes are divided into large nodes and small nodes.

Pitch refers to the distance between nodes.

(2) Bracing

1. Classification: longitudinal connection and horizontal connection.
2. Function: Connect the main truss, make the bridge span structure become a stable space structure that can withstand a variety of lateral loads.
3. The longitudinal connection system is divided into upper horizontal longitudinal connection system and lower horizontal longitudinal connection system. The main function is to withstand the transverse horizontal load, transverse wind, lateral rocking force and centrifugal force acting on the bridge span structure. In addition, the transverse support chord, reducing its free length outside the plane.
4. The transverse connection is divided into bridge frame and crosslink. The main function is to increase the torsional stiffness of steel girder. Properly adjust the uneven force of the two main stringer or two longitudinal links.

(3) Bridge deck system

1. Composition: the longitudinal beam, beam and the connection between the longitudinal beam.

2. Way of force transmission: the load first acts on the longitudinal beam, and then from the longitudinal beam to the beam, and then from the beam to the main truss.

(4) Bridge deck

The bridge deck is the part for vehicles and pedestrians to walk on. The form of the deck is similar to that of steel beam Bridges and combined beam bridges.

Geometric characteristics of the main truss:

Economy, simple structure, conducive to standardization and easy to manufacture and install.


The main truss categories:

Triangular truss: Triangular truss structure is simple, the design is fixed, easy to install and manufacture.



Diagonal bar truss:

Many bar specifications.
Many specifications and large internal force of the vertical rod.
All are large nodes.



The K-shaped truss:

The shear force of the same node is borne by two diagonal rods, which are small and short in section.
The bar has many specifications, many nodes, short intersections, and many crossbar beams and connections. For small and medium-sized spans, the structure is complex.
For large spans, the rods are short, light and suitable for mounting and dismounting Bridges.




Double-vented bar truss:

The same internode shear force is borne by two diagonal rods, which are small and short in section.
It is used for large span, short compression inclined rod, which is favorable for buckling stability.
The small section of the inclined rod makes the number of connecting pins on the joint plate less, and it is easy to arrange the joint.


Features of the steel truss bridge:

Durability: Steel is highly durable and resistant to environmental factors such as corrosion, weathering, and pests.

Rapid Construction: Steel truss bridges can be fabricated off-site, allowing for efficient and rapid construction.

Aesthetic Flexibility: Steel truss bridges offer architectural flexibility, enabling a wide range of aesthetic designs.


Application of the steel truss bridge:

Generally used for urban bridges or highway viaducts and overpasses with small spans, medium and small span reinforced concret, long span prestressed reinforced concrete, medium and small span straight-leg rigid frames (gate-style) and inclined leg rigid frames, large Span T-shaped rigid frame, continuous rigid frame.

Evercross Steel Bridges Overview :

Advantages of the steel truss bridge:

Wide application
Can be customized
Large span
Fast construction speed
Energy saving
Beautiful building appearance

One of the prominent advantages of steel truss bridges is their high load-carrying capacity. They can span considerable distances, making them suitable for crossing wide rivers, valleys, or other significant geographical barriers. Additionally, the modular design of trusses allows for easy modification and adaptation to different site requirements.

Production Factory:

Total Area: 47,000㎡

Production workshop: 22,000㎡

Lifting Capacity:100 tons

Annual output:100,000 tons

Main Products:

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

Certificates:

ISO9001, ISO14001,ISO45001,EN1090,

CIDB,COC,PVOC,SONCAP,etc

Experience:

40 sets of Bailey bridges to Colombia Government

4 Sets LSB (Logistics Support Bridge) to Ministry of Defence Malaysia

45 sets of Compact-200 and 100 bailey bridges to Myanmar Railway Ministry

23 sets of compact-200 bailey bridges to Ecuador Highway Department

110M Truss Bridge for Laos Mekong river

500m modular bridges for Phnom Penh capital of Cambodia

1,600m Steel bridge to Xuanmenwan bridge in Zhejiang province,China