Connection Methods Between UHPC Decorative Components and the Main Structure: Types and Application Analysis

The beauty of architecture begins with connection — the connection technology between UHPC decorative components and the main structure is the golden bond that unites architectural artistry with structural safety.

In the field of contemporary architectural decoration, UHPC (Ultra-High Performance Concrete) has become the preferred material for high-end projects such as landmark buildings and commercial complexes, thanks to its ultra-high strength, excellent durability, and outstanding formability. However, the aesthetic presentation and structural safety of UHPC decorative components largely depend on how they are connected to the main structure. As an industry leader with 28 years of experience in detailed design, manufacturing, and construction of UHPC/GRC/GRG/GRP materials, Qinglong Group will systematically analyze the connection technology of UHPC decorative components from the perspectives of technical principles, application scenarios, and engineering practice.

I. Core Categories and Application Scenarios of UHPC Decorative Component Connection Technology

The connection methods between UHPC decorative components and the main structure must balance load transfer, deformation adaptability, and construction convenience, and are mainly divided into three categories:

1. Rigid Connection: Suitable for Static Scenarios with Stable Loads
Rigid connection achieves rigid fixing between components and the main structure through embedded part welding, bolt fixing, and other methods, and is commonly used for planar components such as exterior wall panels and sunshades. For example, in a commercial complex project, Qinglong Group adopted an "embedded parts + stainless steel bolts" connection system to rigidly fix UHPC cladding panels to the steel structure, ensuring wind load resistance of over 1.5kPa. The advantages of this type of connection lie in direct force transmission and efficient construction, making it suitable for components with regular shapes and well-defined loads, but its adaptability to deformation of the main structure is relatively weak.

2. Flexible Connection: Addressing Dynamic Loads and Structural Deformation
Flexible connection absorbs structural displacement through elastic gaskets, sliding supports, or spring assemblies, and is widely applied to curved shapes, long-span components, and earthquake-prone areas. Taking the UHPC curtain wall of a grand theater as an example, the Qinglong team innovatively adopted a combined solution of "PTFE sliding supports + stainless steel tie rods," allowing components to produce horizontal displacement of ±30mm under temperature changes while meeting the requirement of seismic fortification intensity 8. The key to flexible connection lies in balancing "rigid fixing" with "dynamic adaptation," and refined calculations are required to ensure the fatigue strength of connection nodes.

3. Combined Connection: Technical Integration for Complex Scenarios
For irregular components and oversized decorative pieces (such as UHPC reliefs over 6 meters in height), combined connection (rigid + flexible) becomes the optimal solution. In a cultural landmark project in Nanjing, Qinglong adopted a "back bolt fixing + elastic limiting device" connection system: the back bolts bear the main vertical loads, while the elastic devices absorb horizontal seismic forces, ensuring both the installation precision of the 3.5m × 8m UHPC relief (error ≤2mm) and the durability required for a century-long service life.

II. Key Considerations for Selecting Connection Technology

The connection method for UHPC decorative components requires comprehensive decision-making based on project characteristics:
1. Load Conditions: Select a connection form with matching load-bearing capacity based on parameters such as component self-weight, wind loads, and seismic loads;
2. Structural Deformation: High-rise and long-span buildings should give priority to flexible connections to prevent component cracking caused by settlement or thermal deformation of the main structure;
3. Construction Feasibility: Components with complex shapes should adopt modular connection designs, such as Qinglong's "pre-embedded parts + on-site splicing" technology, which improved installation efficiency by 40%;
4. Durability Requirements: Coastal and high-humidity environments call for 316 stainless steel connectors and anti-corrosion coatings; the "hot-dip galvanizing + fluorocarbon spraying" treatment adopted by Qinglong in a coastal project in Malaysia extended the service life of connection nodes to more than 50 years.

III. Qinglong Group's Connection Technology Innovation and Engineering Practice
As a national-level high-tech enterprise, Qinglong Group holds 12 patents in the field of UHPC connection technology and participated in formulating the industry standard "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)." In the Dongguan Women and Children's Activity Center project, the "BIM parametric node design + 3D scanning positioning" technology achieved millimeter-level precise alignment between UHPC decorative lines and the steel structure, winning the "GRC Construction Engineering Innovation Award"; the Century Plaza renovation project on Nanjing East Road adopted a combined connection system of light-transmitting UHPC and glass curtain walls, pioneering the technology of "light-transmitting integration of the building skin."

From rigid fixing to flexible adaptation, and from single connections to system integration, the connection technology of UHPC decorative components represents a deep integration of material properties, structural safety, and architectural aesthetics. Backed by 28 years of full-chain experience, Qinglong Group provides designers and owners with "one-stop" connection solutions from detailed design to after-sales maintenance through technological innovation and engineering practice, making every UHPC component a perfect carrier of architectural safety and artistic expression.