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CB200
ZHONGHAI
ZHQL-CB200
Steel-concrete bridges, also known as composite bridges, represent a smart fusion of two key construction materials—steel and concrete—leveraging the unique strengths of each to create structures that are stronger, more durable, and more cost-effective than single-material alternatives. This hybrid design has become increasingly popular in modern bridge engineering, suitable for highways, railways, and urban crossings where performance and longevity are top priorities.
The core advantage of steel-concrete bridges lies in the complementary roles of steel and concrete. Steel excels at resisting tension (stretching forces), making it ideal for supporting dynamic loads like heavy traffic or vibrations. Concrete, by contrast, is strong in compression (squeezing forces) and offers excellent durability against weathering and wear. In a composite bridge, steel girders or plates form the tensile framework, while a concrete deck sits atop them. The two materials are bonded together—often via shear connectors (like steel studs welded to the steel beams)—ensuring they act as a single, cohesive structure. This synergy eliminates weaknesses of individual materials: steel prevents concrete from cracking under tension, while concrete protects steel from corrosion and reduces the need for excessive steel reinforcement.
Common types of steel-concrete bridges include composite beam bridges and composite truss bridges. Composite beam bridges use steel I-beams or box girders with a concrete deck, ideal for medium spans (20–100 meters) in urban areas. Composite truss bridges combine steel trusses (for tensile strength) with concrete decking, suitable for longer spans and heavier loads, such as railroad bridges. Both types benefit from reduced material usage: compared to all-steel bridges, they require less steel (lowering costs), and compared to all-concrete bridges, they need less concrete (reducing weight and construction time).
Steel-concrete bridges also offer notable performance benefits. The concrete deck provides a smooth, non-slip surface for traffic and absorbs noise, making them ideal for residential or busy urban areas. Their hybrid structure resists fatigue from repeated loads (critical for high-traffic highways) and has good seismic resistance—steel’s ductility helps the bridge flex during earthquakes, while concrete’s stiffness maintains stability. Additionally, construction is often more efficient: steel components can be prefabricated off-site, and the concrete deck can be cast on-site or using precast panels, minimizing on-site disruption.
From city overpasses to long-span river crossings, steel-concrete bridges balance strength, durability, and efficiency. By combining the best of two materials, they meet the demands of modern infrastructure while offering long service lives—often 70 years or more with minimal maintenance—making them a sustainable choice for future-focused engineering projects.
| 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 |
Steel-concrete bridges, also known as composite bridges, represent a smart fusion of two key construction materials—steel and concrete—leveraging the unique strengths of each to create structures that are stronger, more durable, and more cost-effective than single-material alternatives. This hybrid design has become increasingly popular in modern bridge engineering, suitable for highways, railways, and urban crossings where performance and longevity are top priorities.
The core advantage of steel-concrete bridges lies in the complementary roles of steel and concrete. Steel excels at resisting tension (stretching forces), making it ideal for supporting dynamic loads like heavy traffic or vibrations. Concrete, by contrast, is strong in compression (squeezing forces) and offers excellent durability against weathering and wear. In a composite bridge, steel girders or plates form the tensile framework, while a concrete deck sits atop them. The two materials are bonded together—often via shear connectors (like steel studs welded to the steel beams)—ensuring they act as a single, cohesive structure. This synergy eliminates weaknesses of individual materials: steel prevents concrete from cracking under tension, while concrete protects steel from corrosion and reduces the need for excessive steel reinforcement.
Common types of steel-concrete bridges include composite beam bridges and composite truss bridges. Composite beam bridges use steel I-beams or box girders with a concrete deck, ideal for medium spans (20–100 meters) in urban areas. Composite truss bridges combine steel trusses (for tensile strength) with concrete decking, suitable for longer spans and heavier loads, such as railroad bridges. Both types benefit from reduced material usage: compared to all-steel bridges, they require less steel (lowering costs), and compared to all-concrete bridges, they need less concrete (reducing weight and construction time).
Steel-concrete bridges also offer notable performance benefits. The concrete deck provides a smooth, non-slip surface for traffic and absorbs noise, making them ideal for residential or busy urban areas. Their hybrid structure resists fatigue from repeated loads (critical for high-traffic highways) and has good seismic resistance—steel’s ductility helps the bridge flex during earthquakes, while concrete’s stiffness maintains stability. Additionally, construction is often more efficient: steel components can be prefabricated off-site, and the concrete deck can be cast on-site or using precast panels, minimizing on-site disruption.
From city overpasses to long-span river crossings, steel-concrete bridges balance strength, durability, and efficiency. By combining the best of two materials, they meet the demands of modern infrastructure while offering long service lives—often 70 years or more with minimal maintenance—making them a sustainable choice for future-focused engineering projects.
| 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 |
