Accelerated Bridge Construction
CSS ABC (Accelerated Bridge Construction)
Bridges are rapidly transitioning to rapid construction methods based on factory prefabrication and modularization. Rapid bridge construction is a key value for both users and clients. CSS ABC is a solution applicable to a variety of short-span bridges, utilizing prefabricated components for fast and efficient on-site installation. This simultaneously improves construction convenience, shortens construction periods, reduces costs, and minimizes maintenance.
Additionally, CSS ABC single-span bridges can be designed, manufactured, and installed from a minimum of 2 m to a maximum of 20 m based on insulation standards, and can be pre-stocked and quickly installed as a modular system in containers in preparation for floods or emergency recovery situations.
DSABridge® (Deck Slab Arch Bridge)
Unlike arch-type CSS structures, conventional box-type CSS bridges are significantly affected by bending moments. Maintaining the box-shaped cross-section results in a concentrated change in curvature at the edges (the haunches), where negative moments dominate. In contrast, the upper crown section is structurally characterized by positive moments.
The crown section features shear connectors connecting the CSS and slab, ensuring structural stability and responding to the positive moments generated from above. Furthermore, the stress range of the hem was reviewed, and the interior of the sidewall was designed with high-quality soil and concrete fill to ensure the rigidity of the backsoil section.
This structure applied the recently revised domestic road bridge design standards (LSD method), and reflected the required load (KL-510, HS) and design conditions through analysis based on actual structures using MIDAS GTS NX.
Hunch Moment
Solution.1
Hunch Moment reduced by 66%
The DSABridge reduces superstructure weight by over 30% compared to conventional frame-type concrete bridges, reducing stress transferred to the foundation and enabling a more economical overall structural design. Furthermore, the superior rigidity of CSS ensures safety during concrete pouring and curing. Furthermore, by eliminating the need for a separate slab during pouring, DSABridge improves constructability. Furthermore, compared to conventional methods, it offers greater resilience to river disasters that may occur during construction.
Solution.2
The design unit price for the bridge superstructure is USD 830/m² (based on a 20-meter span), representing a construction cost savings of approximately 40% compared to a conventional concrete frame bridge (USD 1,350/m²). However, unit prices may vary depending on country-specific circumstances.
Additionally, based on the optimal cross-section library database, the span can be selected at 0.4m intervals and the height (rise) at 0.2m intervals, enabling the application of a wider range of economic cross-sections than existing precast frame bridges (standard span unit: 1m).
Bridge Construction Advantage Comparison
Serviceability Comparison
Case Study
Box Shape & DSABridge Specifications
Round & Pipe arch pipe Specifications
Case Study
