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

In the field of contemporary architectural decoration, UHPC (Ultra-High Performance Concrete) has become a key material for shaping architectural aesthetics thanks to its outstanding mechanical properties and artistic expressiveness. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group understands that the connection technology between decorative components and the main structure is the core link in achieving the unity of building safety and aesthetics. This article systematically analyzes the mainstream connection methods for UHPC decorative components and their engineering applications, providing a professional reference for designers and building owners.

I. The Core Value of UHPC Decorative Component Connection Technology

The connection system of UHPC decorative components must simultaneously satisfy three core requirements: safety in load transfer, flexibility in shape realization, and durability in long-term use. Qinglong Group integrates BIM technology at the detailed design stage, using parametric modeling to simulate the stress distribution of different connection schemes, ensuring that connection joints work in coordination with the overall building structure. Compared with traditional GRC components, UHPC, with its compressive strength above 150MPa and excellent toughness, offers greater technical scope for connection design, making it particularly suitable for complex architectural forms such as large spans and irregular curved surfaces.

II. Four Mainstream Connection Methods for UHPC Decorative Components

1. Mechanical Anchoring Connection: Industrial-Grade Safety Assurance

Mechanical anchoring is currently the most widely used connection method, forming a rigid connection with the main structure through stainless steel bolts and embedded parts. Qinglong Group's Nanning production base is equipped with precision machining centers capable of customizing special-shaped inserts and adjustable connectors to resolve on-site installation tolerance issues. A typical application is the UHPC curtain wall system of a commercial complex in Guangzhou, where undercut anchor connections achieved the secure fixing of extra-large panels measuring 3.6m × 1.8m. Verified by a third-party testing agency, its wind pressure resistance meets the standard for Category 12 typhoons.

2. Wet Connection Technology: An Innovative Upgrade of Traditional Methods

For scenarios requiring concealed connections, such as classical-style gardens and European-style buildings, Qinglong developed a dedicated grout connection technology for UHPC. This process injects high-flow, non-shrink grout into the connection sleeves of precast components to form integrally loaded joints. In a cultural landmark project in Dongguan, this technology achieved a seamless connection between UHPC Roman columns and concrete bases, preserving the decorative details of classical architecture while enhancing structural durability. Accelerated aging tests have verified that the connection joints can last more than 50 years.

3. Welded Connection: A Rigid Choice for Large-Span Components

For heavy-load scenarios such as bridge landscape decoration and large sunshade canopies, welded connections demonstrate unique advantages. Qinglong uses ER308L stainless steel welding wire combined with digital welding robots to ensure weld strength reaches more than 85% of the UHPC base material. In a UHPC decorative parapet project for a river-crossing bridge in Nanjing, a combined solution of flange welding and shock-absorbing gaskets successfully resolved the structural stability problem under vehicle impact loads, and the related technology has been filed for an invention patent.

4. Flexible Connection System: An Adaptive Solution for Dynamic Loads

To address inter-story displacement in earthquake-prone areas or high-rise structures, Qinglong innovatively developed UHPC flexible connection joints. This system combines elastic rubber pads with adjustable sliders, allowing components to undergo relative displacement within a certain range. In a cultural tourism project in Yunnan, UHPC relief wall panels using this technology successfully passed a 0.3g seismic acceleration simulation test, becoming a benchmark case of domestic flexible connection technology in the field of decorative components.

III. Engineering Adaptation Strategies for Connection Technology

The selection of connection methods for different building scenarios requires comprehensive consideration of structural type, environmental factors, and cost control. Qinglong's technical team has summarized a "three-dimensional evaluation system": in marine climate regions, 316 stainless steel connectors are preferred; for super high-rise projects, a combined solution of mechanical anchoring and flexible connection is recommended; for historical building renovations, detachable wet connections are adopted to meet heritage protection requirements. This system has been validated in an airport project in Malaysia, successfully achieving a safe connection between the UHPC curtain wall and the existing steel structure.

As a national high-tech enterprise and a participant in the formulation of UHPC industry standards, Qinglong Group has always regarded connection technology innovation as its core competitiveness. From joint simulation at the detailed design stage, to precision control in production, and to full-process quality control in construction and installation, it has formed a full-chain service capability covering "design-production-installation-maintenance." In the future, as UHPC materials are widely applied in architectural decoration, connection technology will develop toward greater intelligence and modularization. Qinglong is willing to leverage its 28 years of professional experience to provide industry partners with safe and reliable system solutions, jointly advancing the progress of architectural decoration technology.