Connection Joint Design Essentials and Engineering Application Analysis for UHPC Curtain Wall Panels and Steel Frame Keels

In contemporary building curtain wall design, node connection technology is the key link that achieves both structural safety and aesthetic expression. As the core element of ultra-high performance concrete (UHPC) curtain wall panel applications, the design of connection nodes with steel frame keels directly affects the overall safety, durability, and economy of a building. Drawing on 28 years of full-chain experience in the UHPC/GRC/GRG/GRP materials field, Qinglong Group has been deeply involved in node technology innovation for many landmark buildings across China. This article systematically analyzes the design essentials and engineering practice value of connection nodes between UHPC curtain wall panels and steel frame keels.

I. Design Logic and Core Parameters of UHPC Curtain Wall Panel Connection Nodes

With its ultra-high strength (compressive strength ≥150MPa), excellent durability, and good toughness, UHPC material provides a lightweight solution for curtain wall systems. In node design, three core elements must be carefully balanced: load transfer efficiency, deformation adaptability, and construction feasibility. Through BIM parametric modeling and structural mechanics simulation, Qinglong's technical team established the composite design principle of "rigid connection + flexible adjustment"—using stainless steel embedded parts to secure the main structure while absorbing thermal deformation stress through elastic gaskets. This technical solution has been successfully applied in the Nanjing East Road Century Plaza renovation project, achieving precise alignment between light-transmitting UHPC curtain wall panels and steel structural keels.

II. Innovative Node Construction Practices in Engineering Applications

To meet the needs of different building scenarios, Qinglong has developed diversified node solutions. In the Dongguan Women and Children's Activity Center project, to address the installation requirements of curved UHPC curtain walls, the innovative "three-dimensionally adjustable connector" technology was adopted, eliminating construction errors through X/Y/Z three-direction adjustment mechanisms and ensuring seamless splicing of hyperbolic components. This technology won the Silver Award of the AALBORG WHITE Cup GRC Construction Engineering Innovation Award. In super high-rise projects, the developed "vibration-damping connection node" achieves buffering and absorption of seismic loads through built-in disc springs, with third-party testing showing its seismic performance improved by more than 40%.

III. Full-Chain Service Ensures Implementation Quality of Node Systems

As a national-level high-tech enterprise integrating detailed design, manufacturing, and construction installation, Qinglong has built a full-process quality control system from node design to finished product delivery. In the detailed design phase, the Rhino+Grasshopper parametric platform is used for node optimization; robot welding is adopted in production to ensure embedded part precision (error ≤0.5mm); and 3D laser scanning technology is introduced for on-site installation to achieve millimeter-level positioning. This full-chain service model enabled Qinglong's UHPC curtain wall project for a Malaysian international airport to set an industry benchmark with zero accidents in the installation of 3,000 special-shaped panels.

IV. Industry Standard Leadership and Technology Innovation Directions

As a chief drafting unit of the industry standard "General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components," Qinglong has been deeply involved in formulating UHPC connection node technical specifications. Looking ahead, as carbon neutrality goals advance, node design will develop toward greener and smarter directions—R&D of recyclable composite material connectors, intelligent monitoring nodes with integrated sensors, and 3D-printed node components have already been included as key research projects at Qinglong's provincial-level R&D center.

From material properties to structural innovation, and from standard formulation to engineering practice, the design of connection nodes between UHPC curtain wall panels and steel frame keels embodies the perfect fusion of precision and artistry in building technology. Qinglong Group will continue its mission of "creating beautiful architecture," providing designers and owners with safe, reliable, economical, and efficient node solutions through technological innovation and full-chain service capabilities, promoting the high-quality application of UHPC materials in the field of architectural decoration.