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Description of steel truss bridge
A truss bridge is a common bridge structure consisting of many small steel members that are connected to form a stable structure. Truss Bridges are widely used in various construction and engineering fields.
Pedestrian steel truss bridge design
We deliver customized preliminary design plans tailored to your project requirements, leveraging advanced tools like TEKLA, CAD, and BIM for precision and efficiency. The 3D modeling capabilities provide immersive visualizations, enabling seamless collaborations and real-time adjustments to meet your exact specifications.
Prefab steel truss bridge materials
Steel's excellent strength-to-weight ratio makes steel truss bridges an ideal choice for long-span transportation facilities. Structural steel is commonly used for the foundational construction of these bridges. For the prefabrication of large-span steel bridges, high-strength steel offers superior stability and safety. When it comes to steel bridges spanning seas or rivers, ASTM A709 steel is the ideal choice.
Q355 B/C/D/E
Q460, Q500, Q550, Q690
Q345q, Q370q, Q420q, Q460q
ASTM A36, ASTM A572
ASTM A572 Gr.50/ Gr.60
ASTM A709 50/ 50W/HPS 50W
S275, S355
S460, S500, S620, S690
S355 N/NL/M/ML, S460 N/NL/M/ML
Composition of steel truss bridge
Superstructure:
The upper structure of the trussed bridge is composed of main beams and cross beams. The main beam is usually made of steel and is responsible for carrying the load. The main beams are connected to each other to form a truss structure. The beam supports the main beam and is located on top, parallel to or at an Angle to the main beam.
Substructure:
The structure of the lower part of the truss bridge consists of two parts: a pier and an abutment. They bear the weight of the bridge and transfer it to the ground.
Steel truss bridge pros
Lightweight:
The truss bridge uses light materials such as steel, which is lighter than the traditional stone arch bridge structure. This kind of truss structure bridge reduces its weight, reduces the load on the bridge foundation, and improves the passing efficiency of vehicles.
High strength:
In the truss bridge structure, the Angle between the beam and the joint is mostly 45 degrees or 90 degrees. A reasonable frame structure design can effectively distribute the load and make the bridge more rigid.
Easy installation:
The steel truss bridge structure is prefabricated and can be manufactured in the factory and then transported to the site for assembly. This structural advantage greatly reduces the time and cost of site construction and shortens the construction period.
Long-span capability:
The cross-section of the steel truss structure is relatively small. Through reasonable design, the spanning capacity of the steel bridge is stronger and it is suitable for the construction of large-span bridges.
Cons of steel truss bridges
Anti-corrosion is necessary.
Steel bridges are constantly exposed to a damp and salt spray environment, making the steel highly prone to rust. Thus, surface treatments such as painting or hot-dip galvanizing are crucial in extending the service life of steel truss bridges.
Noise pollution:
Vibration and noise are generated when vehicles pass over steel truss bridges.
Steel truss bridge connection details
Bolted connections
High-strength bolted connections significantly streamline the on-site assembly of truss bridges. This not only reduces overall construction time but also allows bridges to be put into service much faster.
Bolting provides strong and reliable connections while enabling quicker project completion.
Welded connections
In our fabrication workshop, all individual structural components undergo precise welding performed by certified welding operators. This method ensures an exceptionally tight and robust bond between truss bridge components.
- AWS D1.1/D1.1M
- EN ISO 9606-1
- EN ISO 14732
Conclusion
As an efficient and economical form of bridge structure, prefab steel truss bridge occupies an important position in the field of architecture with its unique advantages. By combining cost reduction and efficiency with customer-specific requirements, SYNERGIA can provide you with prefabricated, durable, and efficient steel truss bridge solutions.
| Product Name | Steel Truss Bridge Fabrication | ||
| Design | TEKLA / BIM / CAD | ||
| Thickness | 8-100mm or customized | ||
| Width | 1600-3200mm or customized | ||
| Length | 8000-16000mm or customized | ||
| Standards | GB | ASTM | EN |
| Materials | Q355q C/D/E Q370q C/D/E Q420q D/E/F Q460q D/E/F Q500q D/E/F Q550q D/E/F Q620q D/E/F Q690q D/E/F Q355qNH D/E/F Q370qNH D/E/F Q420qNH D/E/F Q460qNH D/E/F Q500qNH D/E/F Q550qNH D/E/F |
A709 50[345] 50W[345W] HPS 50W[HPS345W] HPS 70W[HPS 485W] HPS 100W[HPS 690W] |
S355N/NL/M/ML S420N/NL/M/ML S460N/NL/M/ML S460Q/QL/QL1 S500Q/QL/QL1 S550Q/QL/QL1 S620Q/QL/QL1 S690Q/QL/QL1 |
| Surface Treatment | Sand(Shot) Blasting / Acid Washing | ||
| Coating | HDG Painting (INTERNATIONAL / JOTUN / HEMPEL) |
||
| Fasteners for Bridge | Heavy Hex Bolts Sockey Head Cap Screws U Bolts Eyebolts Threaded Rods Welding Studs Anchor Bolts |
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| Bolts standards | GB | ASTM | EN |
| GB/T 1228 GB/T 1231 GB/T 43151 |
ASTM A325(M) ASTM A490(M) ASTM A354 ASTM A574 ASTM F3125 ASTM F1554 |
EN 14399-3 EN 14399-4 DIN6914 DIN6915 DIN931 DIN933 |
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