Analysis of Connection Methods Between GRC Curtain Walls and Main Structures and Discussion of Engineering Applications

As the "outer garment" of modern architecture, the safety and stability of a building curtain wall's connection system directly affect the overall quality and service life of a building. GRC (Glass Fiber Reinforced Concrete) curtain walls are widely used in high-end buildings thanks to their light weight, high strength, and flexible shaping, and the way they connect to the main structure is a core element of project implementation. As an industry expert with 28 years of deep involvement in the UHPC/GRC/GRG/GRP materials field, Qinglong Group will analyze the key points of GRC curtain wall connection systems from three dimensions—technical principles, engineering practice, and innovative applications—providing designers and owners with a full-chain solution.

Core Technology of GRC Curtain Wall Connection Systems: From Mechanical Balance to Detail Control

The connection between GRC curtain walls and the main structure must balance load-bearing capacity, deformation adaptability, and seismic performance. Common connection methods fall into three categories: pre-embedded part connections, post-installed embedded connections, and flexible connections. Pre-embedded connections achieve rigid fixing of GRC panels to the main structure by embedding steel components in the concrete structure in advance. They are suitable for heavy curtain walls with large loads; their advantages lie in direct force transmission and strong stability, but they demand extremely high construction precision and must be installed simultaneously with the main structure. Post-installed embedded connections fix connectors to the main structure via chemical anchors or expansion bolts, offering greater flexibility and being especially suitable for existing building renovation projects. In this field, Qinglong uses BIM technology simulation and 3D scanning positioning to keep installation errors within ±2mm.

Flexible connection technology is an innovative direction in recent years, absorbing thermal deformation and seismic loads through elastic supports or sliding joints to prevent component cracking caused by stress concentration. Take, for example, the Century Plaza renovation project on Nanjing East Road, in which Qinglong participated: its GRC curtain wall adopted "three-dimensionally adjustable flexible supports," successfully solving the deformation coordination problem of large-span curved curtain walls. This technology won the Silver Award of the First AALBORG WHITE Cup UHPC Construction Engineering Innovation Award. Practice shows that reasonable connection design can improve the seismic performance of GRC curtain walls by more than 30% while extending their service life to over 50 years.

Challenges in Engineering Applications and Qinglong's Solutions: From Detailed Design to Construction Implementation

In actual projects, GRC curtain wall connection systems often face three major pain points: connection joint design for complex shapes, compatibility between different materials, and on-site installation efficiency. For double-curved GRC curtain walls on irregular buildings, Qinglong achieves digital modeling of connection joints through parametric design (Rhino+Grasshopper platform), combined with factory-prefabricated modular connectors, shortening on-site installation time by 40%. For example, in the Dongguan Women and Children's Activity Center project, its twisted-surface GRC curtain wall adopted a "prefabricated connectors + on-site fine-tuning" process, which not only ensured shaping precision but also reduced steel usage by 30% through optimized connection joints, winning the Silver Award of the GRC Construction Engineering Innovation Award.

For combined applications of GRC with steel structures and glass curtain walls, Qinglong developed dedicated transitional connectors that solve stress problems caused by differences in thermal expansion coefficients between materials. In a certain international airport project, the connection joints between GRC sunshade panels and the glass curtain wall adopted stainless steel sliding assemblies, achieving seamless integration of architectural aesthetics while ensuring 20 years of maintenance-free service through anti-corrosion treatment. In addition, Qinglong's full-process quality traceability system (with embedded RFID chips) can monitor the production, transportation, and installation of connection components in real time, providing data support for later maintenance.

Industry Trends and Qinglong's Innovation: From Safety and Reliability to Green Efficiency

With the development of building industrialization and green construction, GRC curtain wall connection systems are being upgraded toward lightweight, prefabricated, and intelligent solutions. As a participating developer of the Technical Standard for Architectural Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018), Qinglong was the first to introduce UHPC materials into connection joints. Leveraging the high-strength properties of UHPC embedded parts (compressive strength ≥150MPa), it has achieved miniaturization and lightweighting of connection components, reducing weight by 50% compared with traditional steel connectors. Meanwhile, Qinglong's "GRC-insulation integrated connection system" integrates the insulation layer and connection structure in a unified design, reducing construction procedures and improving building energy efficiency. This technology has been applied in multiple green building demonstration projects.

As a national "specialized, refined, distinctive, and innovative" enterprise and a member of the International GRC Association, Qinglong has always upheld the mission of "creating aesthetic architecture." With 28 years of full-chain experience in detailed design, manufacturing, construction and installation, and after-sales maintenance, it provides customers with expert-level services from connection system design to project implementation. Going forward, Qinglong will continue to drive innovation in GRC curtain wall connection technology, empowering architectural aesthetics through technology and helping more landmark projects achieve a perfect fusion of safety and art.