Connection Methods Between UHPC Decorative Components and the Main Structure and Key Technology Analysis

Under the dual pursuit of contemporary architectural aesthetics and structural safety, UHPC decorative components have become the material of choice for landmark buildings and high-end projects, thanks to their ultra-high strength, excellent durability, and versatile sculptural capabilities. However, the connection technology between components and the main structure, as the core element ensuring both building safety and artistic expression, has always been the focus of industry attention. As an industry leader with 28 years of deep expertise in the UHPC/GRC/GRG/GRP materials field, Qinglong Group will analyze solutions to this technical challenge for designers and owners from three dimensions: classification of connection methods, key technological breakthroughs, and engineering practice verification.

I. Five Connection Systems for UHPC Decorative Components: From Mechanical Load Transfer to Aesthetic Integration

The connection methods between UHPC decorative components and the main structure must balance load transfer, deformation compatibility, and architectural effects. Currently, five mainstream systems are in use. Mechanical anchoring connections achieve rigid fixation through stainless steel bolts or embedded parts, making them suitable for exterior wall cladding panels with heavy loads. In the Century Plaza renovation project on Nanjing East Road, Qinglong Group adopted customized stainless steel connectors to achieve precise alignment between light-transmitting UHPC components and the steel structure. Welded connections transfer shear force through welded section steel and are commonly used for large irregular components, such as the hyperbolic UHPC curtain wall of the Dongguan Women and Children's Activity Center, whose welded joints passed 2 million cycles of fatigue testing with a verified safety factor of 1.8.

Embedded part connections are a common solution for precast components. Qinglong's independently developed "sandwich"-style embedded system reinforces the UHPC and rebar framework with basalt fiber composites, increasing anchoring force by 40% compared with traditional processes. Adhesive bonding, with its advantage of eliminating stress concentration, performs outstandingly in lightweight applications such as GRG ceilings; Qinglong's special epoxy adhesive retained over 90% of its bonding strength after cyclic testing from -40°C to 80°C. Combined connections integrate the advantages of both mechanical and adhesive methods. For example, the UHPC sunshades of a commercial complex in Guangzhou adopted a dual fixation of "bolts + structural adhesive" and successfully withstood Force 12 typhoon loads.

II. Four Key Technological Breakthroughs: From Material Innovation to Smart Construction

The durability of connection joints is the technical core. Qinglong's anti-corrosion and anti-crack technology forms a ceramic protective film on the connector surface, achieving 5,000 hours of salt spray testing without rust. Addressing UHPC's high elastic modulus characteristics, the flexible damping joint design combines neoprene gaskets with spring buffers, allowing joint displacement of up to ±30mm and meeting the inter-story drift requirements of high-rise buildings.

In complex-shape construction, Qinglong's 3D scanning positioning technology achieves millimeter-level installation accuracy; combined with BIM model pre-assembly, it cuts traditional on-site adjustment time by 60%. Meanwhile, the full life-cycle monitoring system embeds fiber optic sensors at key joints to collect stress and strain data in real time, providing data support for after-sales maintenance. This technology has been applied to the UHPC curtain wall system of a landmark project in Malaysia.

III. Engineering Verification and Industry Contribution: From Standard Setting to Global Practice

As a principal drafting unit of the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)," Qinglong Group has distilled its 28 years of engineering experience into technical specifications, with the connection joint design chapter specifying structural requirements for different climate zones. Domestically, from the UHPC cornice lines of the Xiong'an New Area Convention and Exhibition Center to the GRG curved ceilings of the Shanghai International Financial Center, Qinglong's connection technology has been applied across more than 6 million m² in total. In overseas markets, the UHPC renovation components used in the Sydney Opera House renovation project in Australia have withstood the highly corrosive seaside environment, achieving 5 years of zero-maintenance operation.

From material selection to joint design, from construction techniques to later-stage monitoring, the connection technology of UHPC decorative components is a systematic, multidisciplinary undertaking. With the mission of "Creating Aesthetic Architecture," Qinglong Group, through full-chain technology integration and continuous innovation, is driving UHPC connection technology toward greater safety, greater economy, and richer aesthetic expression, providing the construction industry with expert-level solutions from design to maintenance.