The composite beam bridge combines steel members (plate beams, box beams, truss beams) with reinforced concrete components through shear connectors. This innovative design leverages the tensile strength of steel and compressive resistance of concrete, resulting in superior structural efficiency and load capacity.

Composite beams are categorized based on materials:

• Concrete Composite Beams: Integrated through in-situ casting with precast bridge floor slabs
• Steel-Concrete Composite Beams: Combine steel beam ribs with reinforced concrete bridge panels via shear connectors

• Combined section with increased stiffness and reduced steel quantity
• Lower noise levels compared to all-steel bridges
• Easy slope and superelevation adjustment
• Reliable shear transfer mechanisms between steel and concrete components

I-section steel beams for medium and small spans, offering cost-effective production and installation. Can utilize rolled or welded steel beams with asymmetric sections to optimize material usage.

Features higher torsional rigidity and stability than I-section bridges. Ideal for locations with clearance constraints and where traffic disruption must be minimized during construction.

Integrates steel-concrete composite beams with concrete piers for improved seismic performance and aesthetic appeal. Eliminates the need for supports while maintaining large under-bridge clearance.

• Reduced structural weight compared to concrete bridges
• Optimized material performance through steel tension and concrete compression
• Cost-effective solution for long-span applications
• Enhanced design flexibility for curved bridges and complex architectural features
• Improved stiffness, stability, and structural integrity

Reinforced concrete panels support both longitudinal bending moments and cross-bridge internal forces. Available in cast-in-place or precast configurations with straight or curved bottom surfaces.

Critical for joint operation between steel beams and concrete panels. Various types including welded nail, channel steel, and perforated plate connectors ensure effective shear transfer and slip resistance.