How to Ensure Structural Stability of Large-Span GRC Shapes?

In contemporary architectural design, large-span GRC forms have become the preferred decorative solution for high-end projects such as landmark buildings and cultural venues, thanks to their unique artistic expressiveness and structural advantages. However, how to achieve spans of over 30 meters while ensuring structural stability has always been a core concern in the industry. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has developed a systematic technical solution through material innovation, structural optimization, and engineering practice, providing professional assurance for the safe implementation of complex forms.

The structural stability of large-span GRC forms depends first on breakthroughs in material performance. To address the insufficient flexural strength of traditional GRC in large-span applications, Qinglong's R&D team innovatively adopted a composite system of high-dosage alkali-resistant glass fibers and low-alkalinity cement, raising the flexural strength of GRC components to over 20MPa, with an elastic modulus of 25GPa—30% higher than the industry average. These material properties ensure that components maintain structural integrity under self-weight and wind loads. For example, in a cultural center project, a 28-meter-span curved GRC curtain wall achieved a lightweight design weighing only 85kg per square meter through material optimization, greatly reducing the load on the main structure. For more industry information: +WeChat qlfsbl123

A scientific structural design system is the key support for large-span GRC safety. Qinglong introduced BIM technology and parametric design tools to establish a full-process digital twin system spanning from form modeling to mechanical simulation. During the detailed design stage, engineers used finite element analysis software to simulate stress in GRC components, focusing on optimizing reinforcement density and anchoring joints at cantilevered sections to ensure maximum deflection is controlled within L/250 (L is the span). Taking an exhibition center project as an example, its 16-meter cantilevered GRC sunshades adopted a composite structure of "truss-style internal framework + GRC facing layer", dispersing support reactions to the main steel structure. Verified by a third-party testing agency, the structural safety factor reached 1.8 times the design load.

Innovation in construction techniques provides assurance for the installation precision of large-span GRC. Qinglong's original "modular prefabrication + 3D positioning installation" method breaks large-span forms down into standard modules weighing no more than 500kg, prefabricated in the factory, while laser scanning positioning technology on site achieves millimeter-level control of installation errors. In an airport terminal project, for a circular GRC ceiling 45 meters in diameter, the construction team used BIM model pre-assembly and real-time adjustments to keep joint errors between adjacent modules within 2mm, ensuring the geometric stability of the overall structure. In addition, Qinglong's "wind pressure monitoring - temperature compensation - dynamic reinforcement" trinity maintenance system can monitor the structural response of large-span GRC under extreme weather in real time, providing data support for long-term safe operation.

As an enterprise that participated in drafting the Technical Standard for Building Applications of Glass Fibre Reinforced Cement (GRC), Qinglong Group has always placed structural safety at the core of technological innovation. From material formula optimization to construction technique innovation, and from early-stage scheme verification to later-stage maintenance services, full-chain technical capability ensures a perfect balance between aesthetic expression and structural stability in large-span GRC forms. In the future, Qinglong will continue to leverage the technical strength of its national-level R&D center to explore the possibilities of UHPC and GRC composite applications in larger-span scenarios, providing more innovative decorative solutions for the construction industry. For more industry information: +WeChat qlfsbl123