Erection Of Steel Bridges/types Of Steel Bridge
Load-bearing capacity of Type 200 Bailey Bridge
The design load-bearing capacity of Type 200 Bailey Bridge can meet the traffic needs of various heavy vehicles. The following are the specific technical parameters and applicable loads:
1. **Design load**
- **Automobile load**: Type 200 Bailey Bridge is suitable for automobile-10, automobile-20, HS15, and HS20 load designs.
- **Track load**: It can carry a crawler load of 50 tons.
- **Special vehicles**: When special loads need to pass, the Type 200 Bailey Bridge can pass a maximum load of 60 tons per vehicle.
2. **Specific parameters**
- **Single lane bridge deck clear width**: 4.2 meters.
- **Dual lane bridge deck clear width**: 7.4 meters.
- **Combined span range**:
- Single lane: 9.14 meters to 76.2 meters. - Two-lane: 9.14m to 57.9m.
3. **Technical improvements**
The Type 200 Bailey Bridge has undergone a number of improvements in design and structure to improve its load-bearing capacity and stability:
- **Truss height**: 2.134m, higher than the 1.76m of the Type 321, providing greater structural strength and stability.
- **Connection method**: The joints between the reinforcing chords and the joints between the trusses are staggered to reduce the inelastic deformation caused by the pin hole gap, and the pre-arch method is used to reduce the vertical deflection of the bridge mid-span.
- **Bolt connection**: The guide sleeve positioning and fixing method is used to improve the connection accuracy and the service life of the bolts.
- **Wind-resistant tie rod**: Made into an integral type and connected to the crossbeam, it improves the overall stability of the bridge.
Summary
The Type 200 Bailey Bridge can meet the traffic needs of a variety of heavy vehicles with its high load-bearing capacity, flexible design and structural improvements. Its design loads include automobile-10, automobile-20, HS15, HS20, and crawler loads of 50 tons, and it can even pass special vehicles with a maximum load of 60 tons per vehicle. These features make it an ideal choice for various complex engineering requirements.
Specifications:
| CB321(100) Truss Press Limited Table |
| No. | Lnternal Force | Structure Form |
| Not Reinforced Model | Reinforced Model |
| SS | DS | TS | DDR | SSR | DSR | TSR | DDR |
| 321(100) | Standard Truss Moment(kN.m) | 788.2 | 1576.4 | 2246.4 | 3265.4 | 1687.5 | 3375 | 4809.4 | 6750 |
| 321(100) | Standard Truss Shear (kN) | 245.2 | 490.5 | 698.9 | 490.5 | 245.2 | 490.5 | 698.9 | 490.5 |
| 321 (100) Table of geometric characteristics of truss bridge(Half bridge) |
| Type No. | Geometric Characteristics | Structure Form |
| Not Reinforced Model | Reinforced Model |
| SS | DS | TS | DDR | SSR | DSR | TSR | DDR |
| 321(100) | Section properties(cm3) | 3578.5 | 7157.1 | 10735.6 | 14817.9 | 7699.1 | 15398.3 | 23097.4 | 30641.7 |
| 321(100) | Moment of inertia(cm4) | 250497.2 | 500994.4 | 751491.6 | 2148588.8 | 577434.4 | 1154868.8 | 1732303.2 | 4596255.2 |
| CB200 Truss Press Limited Table |
| NO. | Internal Force | Structure Form |
| Not Reinforced Model | Reinforced Model |
| SS | DS | TS | QS | SSR | DSR | TSR | QSR |
| 200 | Standard Truss Moment(kN.m) | 1034.3 | 2027.2 | 2978.8 | 3930.3 | 2165.4 | 4244.2 | 6236.4 | 8228.6 |
| 200 | Standard Truss Shear (kN) | 222.1 | 435.3 | 639.6 | 843.9 | 222.1 | 435.3 | 639.6 | 843.9 |
| 201 | High Bending Truss Moment(kN.m) | 1593.2 | 3122.8 | 4585.5 | 6054.3 | 3335.8 | 6538.2 | 9607.1 | 12676.1 |
| 202 | High Bending Truss Shear(kN) | 348 | 696 | 1044 | 1392 | 348 | 696 | 1044 | 1392 |
| 203 | Shear Force of Super High Shear Truss(kN) | 509.8 | 999.2 | 1468.2 | 1937.2 | 509.8 | 999.2 | 1468.2 | 1937.2 |
| CB200 Table of Geometric Characteristics of Truss Bridge(Half Bridge) |
| Structure | Geometric Characteristics |
| Geometric Characteristics | Chord Area(cm2) | Section Properties(cm3) | Moment of Inertia(cm4) |
| ss | SS | 25.48 | 5437 | 580174 |
| SSR | 50.96 | 10875 | 1160348 |
| DS | DS | 50.96 | 10875 | 1160348 |
| DSR1 | 76.44 | 16312 | 1740522 |
| DSR2 | 101.92 | 21750 | 2320696 |
| TS | TS | 76.44 | 16312 | 1740522 |
| TSR2 | 127.4 | 27185 | 2900870 |
| TSR3 | 152.88 | 32625 | 3481044 |
| QS | QS | 101.92 | 21750 | 2320696 |
| QSR3 | 178.36 | 38059 | 4061218 |
| QSR4 | 203.84 | 43500 | 4641392 |
Advantage
Possessing the features of simple structure,
convenient transport, speedy erection
easy disassembling,
heavy loading capacity,
great stability and long fatigue life
being capable of an alternative span, loading capacity
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