How UHPC Perforated Components Ensure Structural Strength of Perforated Areas: Research on Key Technologies and Design Methods

Empowering Art with Technology, Safeguarding Aesthetics with Structure — The Strength Code of UHPC Hollow-Out Components

At the intersection of contemporary architectural aesthetics and structural engineering, UHPC (Ultra-High Performance Concrete), with its outstanding mechanical properties and design freedom, is becoming the ideal material for designers to achieve a "light and translucent" visual effect. However, when UHPC is applied to hollow-out components, how to ensure structural safety while preserving aesthetic tension has always been a core concern of the industry. As a full-chain solution provider with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group, drawing on 600,000 square meters of production experience and 58 patented technologies, has built a systematic strength assurance system for hollow-out components through material optimization, structural innovation, and process upgrades.

1. Material Genes: The Strength Foundation of UHPC Hollow-Out Components

The inherent ultra-high strength of UHPC itself provides a natural advantage for hollow-out design. In Qinglong's UHPC formulation, steel fiber volume content reaches 2%-5%, combined with optimized quartz sand gradation and nanomaterial modification, pushing the matrix compressive strength beyond 150MPa and flexural strength over 30MPa—3 to 5 times that of conventional concrete. These material properties allow components to reduce cross-sectional thickness while unleashing artistic expression through hollow-out forms. In a cultural center project in Nanning, the Qinglong team used 80mm-thick UHPC hollow-out curtain wall panels, achieving a 30% hollow-out rate while meeting a wind pressure load requirement of 1.5kPa, with a 40% weight reduction compared to the GRC solution—demonstrating UHPC's ability to balance lightness and high strength.

2. Structural Topology: From Parametric Design to Mechanical Simulation

The structural safety of hollow-out components is essentially the optimized design of force flow paths. The correlation model of "hollow-out rate – stress distribution – structural thickness" established by Qinglong's R&D Center generates topological forms through the Rhino+Grasshopper parametric platform, combined with ABAQUS finite element analysis to verify the strength of key nodes. Differentiated reinforcement strategies are adopted for different hollow-out forms: regular grid hollow-outs use a "truss-style" rib layout, while irregular biomimetic hollow-outs use "skeleton-style" principal stress line reinforcement, ensuring a closed load-bearing frame forms around the hollow-out areas. In the translucent concrete project at Century Plaza on Nanjing East Road, this technology successfully controlled the maximum deflection of hollow-out areas within L/400, winning the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award.

3. Process Control: Manufacturing Assurance with Millimeter-Level Precision

Full-process quality control from detailed design to finished product installation is the last line of defense for strength assurance. The CNC engraving molds and automated material distribution systems at Qinglong's Guangxi production base achieve machining precision of ±0.5mm for hollow-out contours; the steam curing regime adopts three-stage temperature control (heating at 20°C/h → constant temperature at 80°C → gradient cooling) to ensure full bonding at the steel fiber–matrix interface; 100% acoustic flaw detection is performed before products leave the factory to eliminate internal defects. In the GRC/UHPC composite component project for the Dongguan Women and Children's Activity Center, this process system achieved a first-pass yield of 99.2% for hollow-out sections, and after installation, the structural performance remained stable through 3 typhoon seasons.

As a contributing unit to the industry standard "General Technical Conditions for Non-Load-Bearing UHPC (Ultra-High Performance Concrete) Components," Qinglong has always believed that strength assurance for UHPC hollow-out components is not the breakthrough of a single technology, but the systematic integration of materials science, structural engineering, and manufacturing processes. From the GRG hollow-out ceiling of the Guangzhou Opera House to the UHPC hollow-out exterior wall of a landmark building in Saudi Arabia, Qinglong, with the mission of "Creating Aesthetic Architecture," continues to explore the application boundaries of new building materials. In the future, with the integration of technologies such as 3D printing and intelligent monitoring, UHPC hollow-out components will achieve a perfect symbiosis of "safety and aesthetics" in more high-end buildings.