How to Ensure Structural Strength at Perforated Sections of UHPC Components — Research on Design Methods and Technical Measures

In contemporary architectural design, UHPC (Ultra-High Performance Concrete) has become a key material for shaping landmark buildings thanks to its outstanding mechanical properties and design freedom. In particular, in the application of perforated components, how to balance artistic expression with structural safety has always been a core challenge for designers and engineering teams. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group has achieved the safe implementation of perforated components in hundreds of landmark projects through deepened design innovation and optimized technical measures, providing replicable solutions for the industry.

I. Structural Characteristics and Design Challenges of UHPC Perforated Components

UHPC material itself possesses ultra-high compressive strength (≥150MPa) and excellent toughness, but its perforated design can lead to problems such as stress concentration and cross-section weakening. In typical application scenarios such as grand theater curtain walls and commercial complex sunshades, perforated areas must simultaneously bear self-weight, wind loads, and temperature deformation, and traditional design methods are prone to risks such as cracking and excessive deflection. Through finite element simulation analysis, Qinglong's technical team found that when the perforation rate exceeds 30%, the stress distribution of components exhibits nonlinear characteristics, requiring targeted optimization of the topology.

II. Three Design Methods for Ensuring Structural Strength

1. Topology Optimization Design Technology: Parametric modeling software (such as Rhino+Grasshopper) is used, combined with genetic algorithms, to perform multi-objective optimization of perforation shapes. Taking the UHPC perforated curtain wall of a cultural center in Nanjing as an example, by simulating stress contours under different porosities, the traditional honeycomb structure was optimized into a bionic fishbone support system, raising the perforation rate to 45% while increasing structural stiffness by 28%.

2. Steel Reinforcement Cage Enhancement System: Three-dimensional spatial reinforcement technology is adopted for key load-bearing areas, with circumferential fiber bars and longitudinal load-bearing bars arranged along perforated edges to form a cage structure. Qinglong's proprietary UHPC fiber blending process (steel fiber volume content of 2.5%-3%) raises the flexural strength of components to over 35MPa, a 40% improvement over conventional designs.

3. Joint Detail Innovation: Detachable prefabricated molds were developed to achieve rounded corner transitions at perforated areas (minimum radius R5mm), avoiding sharp stress corners. In a commercial landmark project in Guangzhou, BIM technology was used to optimize anchoring joints, replacing traditional welded connections with mechanical interlocking fixings, controlling installation accuracy within ±2mm and effectively reducing secondary damage to the structure during construction.

III. Quality Control Through Full-Process Technical Measures

As a National High-Tech Enterprise, Qinglong has established a full-chain quality system covering everything from material R&D to after-sales maintenance. In production, an automated mixing system (error ≤±1%) and a steam curing process (constant-temperature curing at 90°C for 24 hours) ensure the uniformity of UHPC matrix strength; during installation, 3D laser scanning positioning combined with customized lifting fixtures achieves precise docking of perforated components. In an international airport project in Malaysia, these technical measures achieved a 100% installation pass rate for 1,200 perforated sunshade panels, which withstood the severe test of the typhoon season.

IV. Industry Applications and Standards Leadership

With its deep technical expertise in the UHPC field, Qinglong participated in drafting industry standards such as the “General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)”, promoting the standardization of perforated component design. From the GRC perforated relief at the Dongguan Women and Children's Activity Center to the UHPC light-transmitting components at Century Plaza on Nanjing East Road, Qinglong, guided by its mission of “creating aesthetically beautiful architecture”, has perfectly integrated material properties with structural safety. In the future, with the application of technologies such as 3D printing and intelligent monitoring, UHPC perforated components will showcase their unique charm in more high-end buildings, injecting new vitality into urban architectural aesthetics.