What Are the Reinforcement Measures for Hollow GRC Shapes? Opening Reinforcement and Qinglong Group's Structural Innovation

Reinforcement measures for hollow GRC designs require differentiated design based on hollow-out ratio (20-50%), panel dimensions, and stress conditions. The core solution comprises three key technologies: "edge reinforcement, fiber orientation, and local thickening." In projects such as the hollow screens at Hainan Changying Global 100 Theme Park and the translucent partitions at the Shenzhen Yirui Biotechnology Building, Qinglong Group used finite element analysis to identify stress concentration zones, installed 20-30mm wide reinforcement strips at hollow edges (with fiber content increased to 5%), employed robotic directional spraying to distribute fibers along the principal stress direction, and added reinforcement ribs on the back of critical areas (height ≥ 1.5 times panel thickness). In large 2.4m×1.2m panels with a 40% hollow-out ratio, these measures increased flexural strength from the baseline 8MPa to 12MPa, meeting safety requirements.

Edge Reinforcement and Stress Dispersion

Hollow edges are prone to stress concentration. We address this by adding rounded corner transitions (R≥20mm) and optimizing hole shapes (avoiding sharp angles). In the Nanning Wuxiang China Resources MixC project, Qinglong Group thickened hole edges locally to 1.5 times panel thickness, reducing the stress concentration factor from 3.0 to 1.8. Scientific reinforcement prevents brittle failure.

Fiber Orientation and Distribution Optimization

Fibers are directionally sprayed along hollow contours using robotic arms, increasing fiber content in the principal stress direction to 4%. We developed a fiber trajectory algorithm to ensure reinforcement effectiveness. In the Hainan project, directional fiber technology increased the impact resistance of hollow panels by 50%.

Structural Reinforcement and Connection Design

Large hollow panels feature cross-rib lattices with rib width ≥ 60mm. Connection points avoid hollow areas and use distributed hangers. Qinglong Group verified the reinforcement effectiveness through physical testing to ensure absolute reliability. Reinforcing hollow designs is an art of balancing aesthetics and safety.