What Are the Reinforcement Design Principles for UHPC Load-Bearing Members? Structural Design and Qinglong Group Safety Standards

Reinforcement design for UHPC load-bearing components must follow three core principles—"strength matching, durability assurance, and rational detailing"—with key technical requirements including a minimum reinforcement ratio ≥0.8%, rebar spacing ≤100mm, and cover thickness ≥15mm. Drawing on 28 years of structural engineering experience, Qinglong Group optimized reinforcement schemes through finite element analysis in major projects such as the 8-meter cantilever slab of the Shenzhen Yirui Biotechnology Building and the 30-meter span roof of the Hainan International Convention and Exhibition Center, raising rebar utilization to over 85% and ensuring a structural safety factor ≥2.5. Reinforcement design affects not only load-bearing capacity but also component durability, requiring the combination of scientific calculation and practical experience.

Strength Matching Is the Design Foundation

Main rebar diameter is determined by bending moment (typically Φ6-12mm), with stirrups arranged to meet shear requirements (spacing ≤80mm). Qinglong Group uses HRB400 grade rebar with a yield strength ≥400MPa, working in coordination with the UHPC matrix (compressive strength ≥120MPa). In the Wuxiang China Resources MixC One project in Nanning, reinforcement optimization increased component load-bearing capacity by 20% and reduced weight by 15%.

Durability Design Ensures Long-Term Safety

A cover thickness ≥20mm (≥25mm in coastal areas) prevents rebar corrosion. Qinglong Group uses epoxy-coated rebar or stainless steel rebar with a chloride ion diffusion coefficient ≤2.0×10⁻¹² m²/s. In the coastal environment of the Wuhan Han Show Theatre, the rebar showed no corrosion after 10 years of use, verifying the reliability of the design.

Construction Details Determine Success or Failure

Anchorage length ≥15d (where d is the rebar diameter) and lap length ≥30d. Hooks and welded points should avoid stress concentration zones. Qinglong Group uses BIM technology to detect rebar clashes and optimize designs in advance. Scientific reinforcement is the guarantee for the safe application of UHPC load-bearing components.