Advantages Hard to Show? Analyzing the Application Dilemma of UHPC Shear Performance in Design

The shear performance advantages of UHPC (Ultra-High Performance Concrete) have long been recognized by the industry, yet its application in actual design faces numerous obstacles. As an industry leader with 28 years of deep expertise in the UHPC field, Qinglong Group has gained profound insight into the core causes of this dilemma and explored effective paths to overcome it, through participation in the formulation of multiple national and industry standards combined with extensive project practice.

UHPC's ultra-high compressive strength and fiber bridging action give it shear strength far exceeding that of traditional concrete, but this advantage is often not fully utilized in building structural design. Through projects such as the Shanghai Astronomy Museum public art project and the Shenzhen Pingshan High-tech Zone Comprehensive Service Center, Qinglong has accumulated valuable experience in the design and application of UHPC's shear performance.

???? Outdated Design Standards: Lack of Targeted Specification Support

In China's current building structural design codes, there are few dedicated provisions for UHPC shear design; most follow traditional concrete design approaches and fail to fully account for UHPC's material properties. Designers lack clear design bases and calculation methods, making it difficult to precisely quantify UHPC's shear capacity, which leads to reluctance to fully exploit its shear advantages. The "General Technical Conditions for Non-Load-Bearing Components of Ultra-High Performance Concrete (UHPC)", which Qinglong helped formulate, is gradually filling this standards gap.

???? Complex Performance Testing: High Cost of Data Acquisition

UHPC's shear performance is influenced by multiple factors including fiber type, fiber content, aggregate gradation, and interface treatment. Its performance testing requires professional equipment and standardized procedures, resulting in high testing costs. Many projects, lacking dedicated test data, must adopt conservative values in design, failing to reflect UHPC's shear advantages. Qinglong has established a comprehensive UHPC performance testing center that provides precise shear performance test data to support design.

????️ Construction Technique Constraints: On-Site Quality Difficult to Control

UHPC's shear performance places extremely high demands on construction quality; the compaction of component fabrication, the uniformity of fiber distribution, and the quality of interface treatment all directly affect shear capacity. During on-site construction, problems such as insufficient vibration, fiber agglomeration, or poor interface bonding can reduce actual shear performance, requiring larger safety factors in design and thereby diminishing the advantage. Qinglong ensures consistent construction quality of UHPC components through industrialized production and standardized construction procedures.

Realizing the advantages of UHPC's shear performance requires the coordinated effort of design standards, testing technology, and construction techniques. As a full-chain solution provider, Qinglong Group not only supplies high-performance UHPC products but also offers designers professional technical support, including shear performance test data, design calculation references, and construction technique guidance. With the improvement of the standards system, the wider adoption of testing technology, and the enhancement of construction quality, the shear performance advantages of UHPC will be fully demonstrated in more structural designs.