Why UHPC Shear Performance Advantages Are Hard to Realize in Design: Cause Analysis and Optimization Paths

In the field of contemporary building materials, UHPC (Ultra-High Performance Concrete), with its outstanding mechanical properties—especially a shear strength 5-10 times that of ordinary concrete—should by rights be the ideal choice for large-scale public buildings and complex structures. Yet in actual engineering design, this advantage is often left "on the shelf". As an industry-leading enterprise with 28 years of deep expertise in UHPC/GRC/GRG/GRP materials, Qinglong Group will analyze, from a technology implementation perspective, the real-world obstacles to translating shear performance advantages, and propose optimization paths drawing on its full-chain service experience.

**I. The "Cognition-Application" Gap in UHPC Shear Performance** Through the synergistic action of steel fibers distributed randomly in three dimensions and the matrix, UHPC achieves shear strength above 30MPa, offering significant safety redundancy at critical load-bearing locations such as bridge bearings and curtain wall connectors. However, surveys show that more than 60% of construction projects still follow traditional concrete design thinking and fail to fully activate UHPC's shear potential. This gap stems from a dual contradiction: on one hand, the disconnect between laboratory data and engineering practice; on the other, the lack of synchronization between material properties and existing design codes. Take a landmark project as an example: although the design team adopted UHPC curtain wall panels, they lacked a shear performance calculation model and still installed redundant supports according to ordinary concrete construction requirements, resulting in the structural waste of the material's advantages.

**II. Three Core Bottlenecks Preventing Shear Advantages from Being Realized** In the detailed design stage, the lag of technical standards is the primary obstacle. The current Code for Design of Concrete Structures contains no clear provisions for UHPC shear calculation, leaving designers in the predicament of having "no basis to rely on" and forced to conservatively adopt traditional safety factors. At the production and manufacturing level, practice at Qinglong Group's production base in Nanning, Guangxi shows that the uniformity of fiber dispersion in UHPC components directly affects shear performance, while process defects at some manufacturers (such as fiber agglomeration) can cause actual shear strength to decline by more than 30%. In the construction and installation stage, traditional anchoring methods do not match UHPC material properties; in one municipal project, connections made with ordinary expansion bolts caused stress concentration at shear load-bearing points, ultimately forcing rework and rectification.

**III. Full-Chain Collaboration: Qinglong's Shear Performance Optimization Practices** As a national-level high-tech enterprise, Qinglong Group addresses the transformation challenge through an integrated "design-production-construction" solution. On the design side, the BIM parametric shear module developed at its provincial engineering technology center enables force simulation of complex nodes; in the Nanjing East Road Century Plaza renovation project, this technology improved the shear design efficiency of UHPC light-transmitting components by 40%. In production, automated material distribution systems and ultrasonic testing technology ensure that fiber volume content remains stable above 2%, with product shear strength standard deviation controlled within 5%. In the construction stage, a dedicated UHPC anchor bolt system was innovatively developed; verified through mechanical performance testing, its shear bearing capacity is 60% higher than traditional solutions, and it has been successfully applied in benchmark projects such as the Dongguan Women and Children's Activity Center.

**IV. Industry Breakthrough: The Leap from Material Advantages to System Value** For UHPC shear performance to truly empower building safety, the industry must work together to build a new technological ecosystem. As a participating unit in drafting the industry standard General Technical Conditions for Ultra-High Performance Concrete (UHPC) Non-Load-Bearing Components, Qinglong Group is promoting the establishment of a full life-cycle evaluation system that includes shear performance. For designers, it is recommended to lower the application threshold through a "material performance database + typical detail atlas" approach; for owners, they can draw on Qinglong's experience in overseas projects (such as an airport terminal in Malaysia) and incorporate shear performance into the core criteria for material selection. In the future, with the development of smart manufacturing technologies such as 3D printing, the shear performance of UHPC components will achieve more precise digital control.

The release of the value of UHPC shear performance is essentially the deep integration of material innovation and engineering practice. With 28 years of full-chain experience as its foundation, Qinglong Group is driving the transformation of this high-performance material from "laboratory star" to "engineering weapon" through technological R&D and joint standard development. In the field of new architectural decorative materials manufacturing, only by turning material properties into systematic solutions can the industry mission of "creating beautiful architecture" truly be fulfilled.