How to Ensure Structural Stability of Large-Span GRC Shapes: Key Technologies and Practical Exploration

Key Technologies and Practical Discussion on Ensuring Structural Stability of Large-Span GRC Shapes

The ultimate pursuit of architectural aesthetics is often accompanied by severe engineering challenges. As an important form of expression in modern architectural skin art, the structural stability of large-span GRC shapes directly relates to building safety and design realization. Qinglong Group, an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, has developed a systematic solution for large-span GRC structural stability control, drawing on its full-chain technical accumulation and practical experience from hundreds of landmark projects.

Core Technology System for Large-Span GRC Structural Stability

Structural stability of large-span GRC shapes requires coordinated control across three dimensions: material performance, structural design, and construction technology. At the material level, Qinglong adopts its self-developed crack-resistant GRC formulation. By adjusting the glass fiber content (typically 4.5–5%) and the cement-based material mix ratio, the flexural strength of components reaches over 20 MPa and the elastic modulus is increased by 30%, solving the deformation control challenge of large-span components at the source. In the Dongguan Women and Children's Activity Center project, 12-meter-span GRC sun louvers achieved a 25% reduction in self-weight through this material formulation, with deflection controlled within L/2000.

Practical Approach to Structural Optimization Design

Addressing the load-bearing characteristics of large-span GRC, Qinglong innovatively applies BIM parametric design and finite element analysis technology. In the Nanjing East Road Century Plaza renovation project, a digital model of the double-curved GRC curtain wall was built with Rhino+Grasshopper to simulate stress distribution under different load conditions, optimizing a “main rib + secondary rib” grid structural system, which enabled 8-meter-span translucent GRC wall panels to achieve a breakthrough weight of only 85 kg per square meter. At the same time, a composite construction of built-in steel skeleton and GRC material was adopted, which both meets the shape requirements and relies on the steel structure to bear the main loads, forming a dual safety guarantee.

Precision Control Plan for Construction and Installation

The installation precision of large-span GRC directly affects structural stability. Qinglong's 3D laser scanning positioning technology can control installation error within ±3mm. In a convention and exhibition center project, for an 18-meter-span GRC arched roof, the construction method of “segmental prefabrication + on-site hoisting + stress release” was adopted, and through adjustable temporary supports, precise control with cumulative settlement of less than 5mm was achieved. In addition, an RFID chip traceability system was innovatively applied to record data throughout the production, transportation, and installation of each GRC component, establishing a full life-cycle quality archive.

Technical Insights from Industry Cases

Comparing the technical solutions of peers such as Guangdong Shiji Shangpin and Shantaixin Industrial in large-span projects, Qinglong's core advantage lies in its full-chain integration capability. From structural optimization in the detailed design stage, to standardized mold-table production in factory prefabrication, and to construction method innovation in on-site installation, a closed-loop technical guarantee has been formed. For example, in a 36-meter-span GRC ceiling project at an airport terminal, the combination of BIM technology and modular construction shortened the construction period by 40% compared with traditional methods, while controlling the overall flatness after installation to the high standard of 5mm/2m.

As a national high-tech enterprise and a drafting unit of the GRC industry standard, Qinglong has always taken “creating aesthetic architecture” as its mission, organically unifying structural safety with aesthetic expression. The structural stability technology of large-span GRC shapes is not only a fusion of materials science and engineering mechanics, but also a collaborative innovation of design creativity and construction technology. In the future, with the development of UHPC and GRC composite technology, Qinglong will continue to push large-span building skin systems toward lighter, thinner, and more expressive directions, providing solid technical support for architects to realize “impossible shapes”.