Research on Design Methods and Key Technologies for Connection Joints Between UHPC Curtain Wall Panels and Steel Frame Keels

In contemporary building curtain wall technology, connection node design is the core element in ensuring structural safety and aesthetic presentation. As an industry player with 28 years of full-chain experience in the UHPC/GRC/GRG/GRP materials field, Qinglong Group deeply understands the technical essentials of connection nodes between UHPC curtain wall panels and steel frame keels. This article will systematically analyze professional solutions in this field from two dimensions: design method innovation and key technology breakthroughs.

Design Logic and Load Transfer Paths of UHPC Curtain Wall Panel Connection Nodes

UHPC (Ultra-High Performance Concrete), with its ultra-high strength (compressive strength up to 150MPa and above) and excellent durability, has become an ideal choice for curtain wall systems. The design of its connection nodes with steel frame keels must balance three core elements: load transfer efficiency, deformation compatibility, and construction operability. In practical engineering, common connection forms include mechanical anchoring, channel-type embedded part connections, and back-bolt connections; different solutions must be selected comprehensively according to building height, seismic grade, and curtain wall styling. For example, in the Nanjing East Road Century Plaza renovation project, the Qinglong team adopted an integrated casting process combining customized stainless steel embedded parts with UHPC panel bodies, achieving a technical breakthrough of a 30% increase in node load-bearing capacity.

Material Property Matching: Collaborative Design of UHPC and Metal Connectors

The high elastic modulus and low shrinkage of UHPC materials place special requirements on the stiffness matching of connection nodes. The design must focus on resolving two major contradictions: first, the risk of brittle fracture of UHPC panels, and second, the electrochemical corrosion of metal connectors. By using basalt fiber composite rebar to reinforce node areas and applying hot-dip galvanizing to treat steel keels, Qinglong successfully extended the fatigue life of nodes to more than 50 years in a landmark project in Nanning. It is worth noting that in similar node designs, GRC (Glass Fiber Reinforced Concrete) and GRP (Glass Reinforced Thermosetting Plastic) require particular attention to thermal stress issues caused by differences in material thermal expansion coefficients.

Construction Process Innovation: From Digital Pre-assembly to Modular Installation

Modern curtain wall engineering demands precision control at the millimeter level. Qinglong's digital pre-assembly system, built on BIM technology, enables three-dimensional clash detection of nodes before construction, keeping on-site installation errors within ±2mm. In a commercial complex project in Guangzhou, the innovatively adopted "factory prefabrication + on-site dry hanging" process increased UHPC curtain wall panel installation efficiency by 40% while reducing on-site wet work by 80%. This full-process management model is a concentrated embodiment of Qinglong's full-chain advantages as a national high-tech enterprise in detailed design, manufacturing, and construction installation.

Durability Assurance and Full Life-Cycle Maintenance Strategy

The durability of curtain wall nodes directly relates to building safety. Qinglong has built a protective system through three key technologies: first, filling node gaps with silicone structural sealant to achieve dual assurance of water tightness and air tightness; second, establishing a component identity traceability system using RFID chip implantation technology; third, developing specialized testing equipment for online monitoring of node stress. Through the application of these technologies, a cultural center project in Shenzhen undertaken by Qinglong has maintained a 15-year zero-maintenance record in a typhoon-prone environment. As a participating unit in drafting the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)", Qinglong has always carried durability design throughout the product's full life cycle.

From material property research to construction process innovation, the connection node design between UHPC curtain wall panels and steel frame keels is an integrated application of multidisciplinary technologies. With 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group, guided by the mission of "creating beautiful architecture", provides designers and owners with expert-level solutions from conceptual design to after-sales maintenance through 58 patented technologies and full-chain service capabilities. Today, as building envelope technology continues to evolve, only by adhering to professional innovation and the constant pursuit of excellence can one continue to lead industry development in the field of new decorative building materials.