How Many Connection Methods Are There Between UHPC Decorative Components and Main Structure? An Application Analysis

In the field of contemporary architectural decoration, UHPC (Ultra-High Performance Concrete) has become the material of choice for high-end building facade design 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 deeply understands that the connection technology between decorative components and the main structure is a core element in ensuring both building safety and aesthetic realization. This article systematically analyzes the mainstream connection methods for UHPC decorative components and their engineering applications, providing professional technical reference for designers and owners.

**I. Core Classification of UHPC Decorative Component Connection Technologies**

The connection system for UHPC materials must balance three dimensions: structural safety, construction efficiency, and architectural effect. Currently, mainstream technologies can be divided into four categories:

1. **Mechanical Anchoring Connection**: Rigid fixation to the main structure through stainless steel bolts and embedded parts, suitable for large exterior wall cladding panels and irregularly shaped shading components. The CNC drilling technology adopted at Qinglong's Nanning production base achieves installation hole position accuracy of ±0.5mm, and combined with customized metal connectors, meets the wind pressure resistance and seismic requirements of high-rise buildings.

2. **Wet Connection Technology**: Uses UHPC-specific grouting material to achieve a seamless connection between components and the structure, commonly used for small landscape components such as benches and flower beds. This process requires strict control of grout fluidity and curing conditions. The shrinkage-compensating grout developed by Qinglong achieves a 28-day compressive strength of up to 120MPa, ensuring the durability of connection joints.

3. **Dry-Hung Connection**: Drawing on the stone curtain wall system, a flexible connection between components and keels is achieved through aluminum alloy hangers, particularly suitable for the curved exterior walls of commercial complexes. The "General Technical Conditions for Non-Load-Bearing Ultra-High Performance Concrete (UHPC) Components", which Qinglong participated in drafting, clearly specifies the load-bearing capacity calculation methods and joint construction requirements for dry-hung systems.

4. **Composite Connection System**: Combines mechanical anchoring and bonding technology, used for ultra-long-span UHPC components (such as airport terminal overhangs). In the Nanjing East Road Century Plaza renovation project, Qinglong adopted a "bolt + epoxy resin" composite connection solution, successfully achieving the safe installation of translucent UHPC components weighing up to 800kg each.

**II. Connection Technology Selection Strategies for Different Scenarios**

The selection of connection methods requires comprehensive judgment based on building type, component dimensions, and environmental conditions:

• **Landmark Building Exterior Walls**: Prioritize mechanical anchoring + dry-hung composite systems. For example, in a provincial grand theater project undertaken by Qinglong, three-dimensionally adjustable stainless steel hangers were used to achieve the precise installation of double-curved UHPC curtain wall panels, with joint deviation controlled within 2mm.

• **Municipal Landscape Projects**: Wet connection technology is more economical. In a city cultural park project, Qinglong combined prefabricated UHPC planters with on-site grouting, ensuring both installation efficiency and landscape integrity.

• **Overseas High-Temperature and High-Humidity Environments**: Material corrosion resistance requires special consideration. In a commercial complex project exported to Malaysia, Qinglong used 316 stainless steel connectors treated with fluorocarbon coating to ensure a service life of more than 20 years.

**III. Core Advantages of Qinglong's Connection Technology**

As a national high-tech enterprise, Qinglong has established three major technical barriers in connection system R&D: first, BIM parametric design capability, enabling advance simulation of the stress state of connection joints; second, in-house metal processing workshops, capable of customizing connectors for special working conditions; third, full-process quality control, executing 18 inspection procedures from material entry to installation acceptance. These advantages have been validated in the UHPC projects undertaken by Qinglong for major works such as the Canton Tower and the Shenzhen World Exhibition & Convention Center.

**IV. Industry Trends and Technological Innovation Directions**

With the development of building industrialization, UHPC connection technology is evolving toward modularity and intelligence. The "RFID smart connectors" currently being tested at Qinglong's R&D center can monitor stress changes at joints in real time, providing data support for smart operation and maintenance. Meanwhile, in response to the needs of ultra-low energy consumption buildings, a new integrated insulation connection system has entered the engineering pilot stage.

Choosing the appropriate connection technology is key to achieving both aesthetic value and structural safety for UHPC decorative components. With 28 years of engineering practice experience, Qinglong Group can provide full-cycle services for all types of building projects, from connection solution design to on-site installation guidance. To learn more about UHPC/GRC/GRG/GRP material application technologies, welcome to follow Qinglong's official technical column.