What Are the Reinforcement Design Principles for UHPC Load-Bearing Members?

The reinforcement design of UHPC load-bearing components is the core of ensuring structural safety and must follow the principle of balancing strength, toughness, and durability. Based on finite element analysis and project verification, Qinglong Group believes that quality reinforcement should achieve a flexural strength of ≥15MPa and a crack width of ≤0.1mm, realizing a safe and economical design through the synergistic reinforcement of fibers and steel bars.

Fiber reinforcement is the foundation. Steel fibers with a volume fraction of 2%-3% and a length of 12-20mm form a three-dimensional network. In Qinglong Group's Hainan project, fiber reinforcement improved crack resistance by 50%. The steel reinforcement ratio is 0.8%-1.2%, with diameters of 6-12mm, calculated according to loads. Collaborative design brings out the material's advantages.

Durability design is essential. A protective cover thickness of ≥20mm prevents corrosion. Through optimization, Qinglong Group achieved component lifespans of over 50 years. Reinforcement design must be combined with construction to ensure feasibility. Scientific design safeguards load-bearing safety.