Introduction of the steel structure:
Steel structures, such as those used in buildings, bridges, and
industrial facilities, undergo a series of processing steps to
transform raw steel materials into the final assembled components.
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.
Key Considerations in Steel Structure Processing:
Material selection and quality control
Dimensional accuracy and tolerances
Welding techniques and joint design
Corrosion protection and maintenance
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
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
|
