How Do UHPC Hollow-Out Components Ensure Structural Strength in Openwork Areas? Reinforcement Design and Qinglong Group's Innovative Techniques

The structural strength of UHPC hollow components is ensured through a triple-technology approach of "optimizing the hollow ratio, strengthening the frame design, and directional fiber enhancement." In the hollow panel project at Hainan Changying Paradise, Qinglong Group controlled the hollow ratio between 30-50%, set the frame width at ≥80mm, and directionally placed steel fibers (3% volume fraction) in stress concentration zones, achieving component flexural strength above 12MPa and meeting the 1.0kN/m² wind pressure requirement. Finite element analysis was used to optimize the hollow patterns, avoiding stress concentration at sharp angles and ensuring that hollow areas do not develop cracks under long-term loads.

Hollow Ratio and Structural Balance

When the hollow ratio exceeds 50%, additional stiffening ribs or thicker frames are required. Through topology optimization, we enhance strength while maintaining aesthetics. The frame width is generally ≥100mm, with curved transitions (R≥20mm) at corners.

Fiber Reinforcement Technology

In hollow edge areas, robotic arms spray fibers directionally, raising the fiber content along the principal stress direction to 4%. Steel fibers are 12-20mm long and provide excellent anchoring performance.

Connection and Installation Assurance

During hollow panel installation, connection points are kept away from hollow areas, and embedded parts provide pull-out resistance ≥8kN. Qinglong Group's hollow components have been proven safe and reliable in practice.