Large Span Steel Bridge Structure Heavy Loading Bridge Steel Truss

Introduction of the steel structure:

The steel structure can be processed into various steel structure bridges, such as steel truss bridge. Steel truss bridge is a structural system between beams and arches. 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
 
 
(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.
 
 

Application of the steel structure:

Highway and Road Bridges: Steel truss bridges are frequently used in the construction of highway and road bridges. They are suitable for a wide range of span lengths, from short to long, making them versatile for accommodating different road widths and crossing various terrains.

Pedestrian Bridges
 

Advantages of the steel structure:

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

Evercross Steel Bridges Overview :