How UHPC Perforated Components Ensure Structural Strength of Openwork Sections: Analysis of Key Technologies and Design Strategies

Empowering aesthetics with technology, safeguarding lightness with structure—the secret to the strength of UHPC hollow components lies in the dual refinement of material innovation and engineering wisdom.

In contemporary architectural design, UHPC (Ultra-High Performance Concrete) has become a "star material" for creating landmark buildings thanks to its ultra-high strength, excellent durability, and outstanding modeling capability. Among its applications, UHPC hollow components are highly favored in cultural venues, commercial landmarks, landscape installations, and other settings for their light and airy visual effects. However, while hollow designs endow buildings with artistic appeal, they also pose severe challenges to structural strength. As an industry leader with 28 years of experience in detailed design, manufacturing, and construction of UHPC/GRC/GRG/GRP materials, Qinglong Group has accumulated systematic technical solutions and practical experience in this field. This article provides an in-depth analysis of the key technologies and design strategies for ensuring the strength of UHPC hollow components.

### 1. Material Essence: UHPC's "Innate Advantages" Lay the Foundation for Strength

The strength assurance of UHPC hollow components stems first from the exceptional performance of the material itself. Compared with traditional concrete, UHPC incorporates steel fibers or active admixtures such as ultra-fine silica fume to form a dense microstructure, achieving compressive strength of 150-200 MPa, flexural strength exceeding 30 MPa, and fracture toughness more than 10 times that of ordinary concrete. These "innate advantages" allow UHPC to maintain sufficient structural load-bearing capacity even when cross-sections are reduced and hollow forms are created. As a national-level high-tech enterprise, Qinglong Group has further optimized UHPC's fiber dispersion and interfacial bonding strength through its independently developed proprietary formulations, providing a solid material foundation for hollow components. For example, in the Nanjing East Road Century Plaza renovation project, its translucent UHPC components achieved a 30% hollowing rate while successfully withstanding long-term loads and temperature variations in outdoor environments.

### 2. Structural Optimization: The "Acquired Wisdom" of Topology Design and Stress Relief

Beyond the material itself, scientific structural design is central to ensuring the strength of hollow areas. During the detailed design phase, Qinglong's technical team typically adopts three key strategies: First, topology optimization of hollow patterns using finite element analysis software (such as ANSYS) to avoid sharp angles or narrow bridge structures in stress concentration zones, keeping the hollowing rate within a reasonable range of 20%-40%; second, setting "reinforcing ribs" or "graduated thickness" at hollow edges—for example, transitioning the component edge thickness from 30mm at the center to 50mm—to form a mechanical buffer zone; third, combining BIM technology with parametric modeling to ensure coordination between complex hollow forms and structural load-bearing. This full-process control of "design-simulation-optimization" enabled the GRC/UHPC composite component project for the Dongguan Women and Children's Activity Center, undertaken by Qinglong, to achieve complex hollow reliefs while passing rigorous wind pressure resistance and seismic performance tests.

### 3. Process Control: "Full-Chain Assurance" from Production to Installation

Achieving the strength of UHPC hollow components depends on refined production and construction processes. In production, Qinglong uses automated material distribution and vibration molding technology to ensure steel fibers are evenly distributed in hollow areas, preventing localized strength weaknesses caused by fiber clustering or absence; for highly complex hollow forms, 3D printing mold technology is introduced to replicate cavities with millimeter-level precision. During installation, the "modular hoisting + 3D laser positioning" process reduces secondary damage to components from on-site welding, while elastic connection joints release thermal stress. This "factory prefabrication + precision assembly" model not only safeguards the strength of the components themselves but also ensures the stability of the overall structure—just as Qinglong achieved the safe installation of UHPC hollow sunshades with an 8-meter span in an overseas project (such as a commercial complex in Malaysia) using this process.

### 4. Industry Practice: The "Qinglong Solution" for Balancing Aesthetics and Safety

As Vice Chairman Unit of the China GRC Association and a participant in drafting the industry standard "General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components," Qinglong Group has always upheld the mission of "creating beautiful architecture" and formed an integrated "material-design-process" solution in the field of UHPC hollow components. Whether for the facade decoration of landmark buildings or the artistic expression of landscape installations, Qinglong leverages its 28 years of full-chain experience to provide designers and owners with expert services ranging from design development to after-sales maintenance. Looking ahead, as UHPC materials become more widespread in architecture, Qinglong will continue exploring the balance between the extreme forms of hollow components and structural safety, driving innovative development in the new decorative building materials industry.

[Summary] The strength assurance of UHPC hollow components is a comprehensive achievement of materials science, structural engineering, and construction technology. From precise control of material formulations, to intelligent optimization of topology design, to strict control of full-process techniques, every stage embodies the technical expertise of an industry leader. Guided by the values of "honesty, perseverance, trust, and collaboration," Qinglong Group will continue to provide the architectural decoration field with UHPC solutions that combine aesthetic value with structural safety, allowing the light beauty of hollow designs to shine with enduring charm on city skylines.