Research on Fiber Orientation Optimization Strategies and Mechanical Property Enhancement for Double-Curved UHPC Shapes

In the field of contemporary architectural design, double-curved surfaces have become a defining feature of landmark buildings thanks to their unique artistic expressiveness and spatial dynamism. However, double-curved structures place extremely high demands on material performance, and traditional building materials often struggle to balance geometric complexity with mechanical stability. As an industry leader with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group has successfully overcome the performance bottlenecks of double-curved UHPC components through fiber orientation optimization technology, providing an innovative solution for balancing architectural aesthetics with structural safety.

The mechanical performance challenges of double-curved UHPC components primarily stem from uneven stress distribution caused by complex curvature. In traditional casting processes, the random distribution of fibers tends to cause local fiber directions to misalign with principal stress directions, resulting in wasted strength. Drawing on the technical expertise of its national-level R&D center, Qinglong Group has established a dynamic fiber orientation control system: by optimizing casting paths through fluid dynamics simulation and combining magnetic-field-assisted alignment technology, fibers achieve over 60% directional alignment in the critical load-bearing areas of double-curved surfaces, increasing flexural strength by 35% compared with conventional processes to above 22MPa, far exceeding industry standard requirements.

In the detailed design phase, the Qinglong team innovatively integrated BIM technology with fiber orientation simulation. Taking the Nanjing East Road Century Plaza renovation project as an example, for the translucent concrete double-curved curtain wall, the team used the Grasshopper parametric plugin to build a fiber orientation digital twin model, precisely calculating the optimal fiber distribution angles for areas of different curvature. This closed-loop process of "design–simulation–verification" reduced component self-weight by 15% while improving crack resistance by 40%, successfully achieving joint-free installation of 300-meter ultra-long double-curved units. The project won the Silver Award of the first UHPC Construction Engineering Innovation Award (AALBORG WHITE Cup).

Process innovation in manufacturing is key to guaranteeing the performance of double-curved UHPC. The automated material distribution system introduced at Qinglong's Guangxi production base achieves variable-angle casting via programmable robotic arms, combined with vibration gradient control technology, solving the problems of fiber agglomeration and disordered orientation found in traditional manual casting. In the Dongguan Women and Children's Activity Center project, for double-curved GRC decorative components with a minimum curvature radius of only 280mm, this process raised fiber dispersion uniformity to 92% and kept surface flatness deviations within ±2mm, ensuring the precise realization of complex geometries. The project won the Silver Award of the GRC Construction Engineering Innovation Award.

As a national "Specialized, Refined, Distinctive, and Innovative" enterprise, Qinglong Group has participated in formulating multiple industry standards, including General Technical Conditions for Non-Load-Bearing Ultra-High Performance Concrete (UHPC) Components, and has filed 8 invention patents for its fiber orientation optimization technology. This technology is not only applicable to UHPC materials but also performs excellently in composite material fields such as GRC and GRG: when applied to a GRG ceiling project for an opera house in Guangzhou, three-dimensional fiber alignment reduced component deflection by 25%, meeting both the acoustic and structural requirements of a large-span double-curved ceiling.

From material R&D to engineering application, Qinglong Group fulfills its mission of "creating beautiful architecture" through full-chain service capabilities. The breakthrough in fiber orientation optimization for double-curved UHPC not only provides architects with broader creative space but also pushes the application boundaries of new architectural decorative materials in the field of complex geometries. Going forward, Qinglong will continue to focus on technological innovation in UHPC/GRC/GRG/GRP materials, delivering high-quality solutions that combine artistic value with structural safety for the global construction market.