How to Ensure Structural Stability of Large-Span GRC Shapes? — Qinglong Group's Large-Span Structure Technology

The structural stability of large-span GRC shapes (span ≥6m) must be ensured jointly through material strengthening, support design, and computational verification. Qinglong Group employs ultra-high-strength GRC, prestressing technology, and precise analysis to achieve thin-walled structures with spans exceeding 12m.

Material performance is the foundation of stability. GRC with compressive strength ≥60MPa and elastic modulus ≥30GPa is used. Qinglong Group increases material toughness 3-fold by adding steel fibers (3% volume fraction) and optimizing the mix gradation. Large-span panel thickness is controlled at 30-50mm, with stiffness enhanced by stiffening ribs.

The support system optimizes load transfer. A spatial grid structure is adopted, with joint stiffness carefully designed. In the Hainan Convention and Exhibition Center project, Qinglong Group developed a flexible support system that accommodates thermal deformation while ensuring stability. Support spacing is determined by calculation to prevent local instability.

Computational verification is indispensable. Buckling loads are verified through finite element analysis, with a safety factor of ≥4. Wind tunnel tests determine the wind pressure distribution and optimize the aerodynamic performance of the shape. These measures ensure that large-span GRC structures are safe and reliable.