Analysis and Application of GRC Curtain Wall to Main Structure Connection Methods

In modern architectural design, GRC curtain walls have become a key material for balancing architectural aesthetics with structural safety, thanks to their lightweight yet high-strength properties and flexible forms. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP, Qinglong Group deeply understands that the core technology connecting the curtain wall to the main structure plays a decisive role in project success. This article systematically analyzes the key design points of GRC curtain wall connection systems, from connection principles and technology selection to engineering practice, providing professional solutions for designers and owners.

Core Functions and Design Principles of GRC Curtain Wall Connection Systems

GRC curtain wall connection nodes are key hubs for transferring loads and accommodating deformation, and must simultaneously meet three major requirements: structural safety, architectural function, and construction feasibility. During the detailed design stage, Qinglong's technical team always follows the principles of "safety redundancy, flexible adaptation, and precise positioning": BIM technology is used to simulate temperature deformation, seismic loads, and other working conditions, ensuring the stability of connection nodes under dead weight, wind loads, and seismic actions; adjustable connectors are adopted to absorb settlement of the main structure and thermal expansion and contraction of curtain wall materials, avoiding cracking risks caused by rigid connections; and 3D laser scanning technology is combined to achieve millimeter-level installation accuracy, ensuring the overall sealing performance and durability of the curtain wall system.

Technical Characteristics and Application Scenarios of Mainstream Connection Methods

Currently, GRC curtain walls mainly adopt four types of connection systems, each with its own technical advantages and applicable conditions. Undercut anchor connection forms a rigid fixing through stainless steel undercut anchors and pre-embedded parts of the main structure, suitable for super high-rise projects exceeding 50 meters in height—Qinglong applied this technology in a landmark building in Nanjing, achieving safe hoisting of GRC curtain wall panels with a single panel area of up to 8㎡. Point-supported connection uses stainless steel spider fittings to suspend GRC panels on steel structure keels, making it particularly suitable for curved curtain walls—for example, the hyperbolic GRC curtain wall of a cultural center in Guangzhou adopted this scheme, achieving precise positioning of 1,200 connection points through parametric design. Channel connection works through the cooperation of aluminum profile clamping slots and reinforcing ribs at the edges of GRC panels, combining installation efficiency with adjustment allowance, and is widely used in standard curtain wall panels of commercial complexes. Embedded connection partially embeds GRC panels into reserved slots of the main structure, suitable for low-rise buildings or decorative curtain walls—for example, the GRC antique-style components of a garden landscape project in Suzhou adopted this process.

Connection System Optimization Strategies from a Full Life-Cycle Perspective

As a national-level high-tech enterprise, Qinglong always optimizes GRC curtain wall connection systems from a full life-cycle perspective. At the material level, a self-developed composite formula of alkali-resistant glass fiber and low-alkali cement is adopted, giving GRC components a flexural strength of over 25MPa and reducing the load on connection nodes by 30%. In the production stage, automated production lines control the embedding precision of connectors within ±2mm. During construction, innovative RFID chip tracing technology is applied to establish a quality traceability system for connection nodes. In the after-sales maintenance stage, specialized testing services are provided, with regular evaluation of key indicators such as connecting bolt torque and anti-corrosion coatings. This full-chain control model of "design-production-construction-maintenance" has enabled GRC curtain wall systems in projects undertaken by Qinglong, such as the Nanning Convention and Exhibition Center, to achieve 15 years of zero-fault operation.

Technical Innovation and Challenge Response in Engineering Practice

Faced with complex project requirements, Qinglong's technical team continues to break through bottlenecks in connection technology. In an airport project in Malaysia, addressing the characteristics of the tropical climate, the team innovatively developed a combined system of anti-corrosion stainless steel connectors and elastic seals, successfully solving the durability problem of nodes in high-temperature and high-humidity environments. In a historical building renovation project in Shanghai, a detachable connection node design was adopted, meeting both the rapid installation needs of the GRC curtain wall and retaining flexibility for future building maintenance. These practices not only verified the adaptability of GRC curtain wall connection technology but also demonstrated Qinglong's technical strength as a participant in industry standard setting—the Technical Standard for Building Applications of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018), compiled under the company's leadership, has become an important basis for connection system design.

As a leader in the field of UHPC/GRC/GRG/GRP architectural decoration materials, Qinglong Group firmly believes that technological innovation in curtain wall connection systems is the core driving force behind the coordinated development of architectural aesthetics and engineering safety. From material R&D to system integration, from standard setting to project practice, Qinglong will continue its mission of "creating beautiful architecture," providing more imaginative material solutions for designers worldwide and creating safer, more durable architectural works for owners. In the future development of architecture, GRC curtain wall connection technology will inevitably evolve toward lighter weight, greater intelligence, and greener solutions, and Qinglong is fully prepared to write a new chapter in architectural decoration together with its industry partners.