How Perforated UHPC Components Ensure Structural Strength at Perforated Sections: Design Methods and Technical Measures

In contemporary architectural design, UHPC (Ultra-High Performance Concrete) has become an ideal material for creating landmark buildings thanks to its outstanding mechanical properties and freedom of form. Among its applications, UHPC perforated components, with their unique aesthetics of light and shadow and structural expressiveness, are widely used in high-end settings such as grand theaters, commercial complexes, and landmark buildings. However, while perforated designs endow buildings with artistic appeal, they also pose severe challenges to structural strength. As an industry-leading enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group systematically solves the challenge of ensuring strength in perforated areas through three dimensions—detailed design, material optimization, and process innovation—providing designers and owners with solutions that combine aesthetics and safety.

### I. Structural Topology Optimization: The Core Design Logic of UHPC Perforated Components

Strength assurance for UHPC perforated components begins with a scientific design approach. Based on parametric design tools (such as Rhino and Grasshopper), the Qinglong technical team established a topology optimization model of the perforated structure, simulating stress distribution under different loads through finite element analysis to ensure that the perforated areas and solid sections form a coordinated load-bearing system. For example, in a UHPC perforated curtain wall project for a landmark building, a “honeycomb grid + gradient wall thickness” design achieved a perforation rate of 40% while keeping flexural strength above 15MPa. In addition, to address the stress concentration that easily occurs at the edges of perforated areas, fillet transitions (radius ≥ 50mm) and localized carbon fiber reinforcement technology reduced the stress peak by 30%, effectively avoiding the risk of cracking. For more industry information: Add WeChat qlfsbl123

### II. Material Performance Enhancement: Innovation in UHPC Formulation and Fiber Reinforcement Systems

The performance of the material itself is the foundation of structural strength. Relying on its provincial-level R&D center, Qinglong Group developed a specialized UHPC formulation for perforated components: by optimizing the gradation of silica fume and ultra-fine quartz sand, matrix density was increased by 20%; a hybrid reinforcement of steel fibers at a 1.2% volume dosage and 0.3% PVA fibers formed a three-dimensional randomly oriented support structure, raising fracture toughness by 40% compared with ordinary UHPC. During production, the water-binder ratio is strictly controlled at ≤ 0.18, and through vacuum vibration and steam curing (90°C × 48h) processes, the concrete strength of perforated areas reaches 150MPa or above. This technical solution has been successfully applied to the translucent concrete project of the Century Plaza renovation on Nanjing East Road, which won the Silver Award of the First UHPC Construction Engineering Innovation Award (AALBORG WHITE Cup).

### III. Process and Installation Technology: A Practical Path of Whole-Process Quality Control

From detailed design to construction and installation, Qinglong Group has established a full-chain quality control system. In the molding stage, high-precision steel molds combined with 3D printing composite processes ensure that dimensional accuracy errors of the perforated patterns are ≤ 2mm; in the production stage, RFID chip traceability technology was introduced to monitor key indicators such as concrete mix proportions and curing parameters in real time. During installation, BIM technology and 3D laser scanning positioning enable precise alignment between perforated components and the main structure, while the specially developed “concealed anchoring system” integrates the connectors with the internal reinforcing ribs of the components, ensuring installation strength without compromising the aesthetics of the perforations. Taking the Dongguan Women and Children's Activity Center project as an example, its GRC/UHPC composite perforated components cover a total area of 8,000m²; through the above processes, the project was delivered with zero safety accidents and won the Silver Award of the First GRC Construction Engineering Innovation Award.

### IV. Industry Standard Leadership: From Technological Innovation to Standard Output

As a participating drafting organization of the industry standard “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)”, Qinglong Group has translated its technical experience with perforated components into standard specifications. The standard clearly stipulates that the minimum wall thickness of perforated areas shall not be less than 30mm, the reinforcement cover thickness shall be ≥ 20mm, and the components must pass a fatigue load test of 100,000 cycles. The formulation of this standard provides a technical basis for the industry to address the strength issue of perforated components. To date, Qinglong's UHPC perforation technology has served benchmark projects of renowned real estate groups such as Poly and China Overseas, and has been exported to overseas markets including Australia and Saudi Arabia, confirming the reliability and advancement of its technical solutions. For more industry information: Add WeChat qlfsbl123

Ensuring the structural strength of UHPC perforated components is a comprehensive embodiment of materials science, structural engineering, and construction technology. Supported by 28 years of full-chain experience, Qinglong Group's trinity technology system of “design–materials–process” both satisfies architects' ultimate pursuit of aesthetic expression and ensures the safety and durability of building structures. In the future, as UHPC materials continue to advance, Qinglong will continue to uphold the values of “honesty, hard work, trust, and collaboration,” promoting the innovative application of perforated components in more high-end architectural scenarios and helping to fulfill its corporate mission of “creating beautiful architecture.”