How to Test the Wind Pressure Deformation Performance of GRC Curtain Walls: Methods, Standards and Key Implementation Points Explained

As the "outer garment" of modern buildings, the wind pressure deformation performance of architectural curtain walls directly affects the safety and durability of buildings. Particularly for GRC curtain walls, which are widely used in high-end buildings, scientific testing methods are the key to ensuring structural stability under strong wind loads. As an industry-leading enterprise with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group draws on its practical experience in participating in the formulation of the Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings (JGJ/T 423-2018) to systematically explain the key testing points for the wind pressure deformation performance of GRC curtain walls.

Core Methods and Standard Basis for Wind Pressure Deformation Testing of GRC Curtain Walls

Testing of the wind pressure deformation performance of GRC curtain walls must strictly comply with the requirements of the national standard Curtain Wall for Building (GB/T 21086-2007) and the industry standard Technical Standard for Application of Glass Fiber Reinforced Cement (GRC) in Buildings. The test simulates actual wind load effects to evaluate the deformation, deflection, and structural integrity of the curtain wall under positive and negative wind pressures. Qinglong Group's laboratory employs a dynamic wind pressure testing system capable of accurately simulating typhoon wind pressure environments of Beaufort force 0-12. Through multi-point displacement monitoring technology, it records in real time the stress and deformation data of GRC components under different wind pressure levels, ensuring that test results closely match actual engineering conditions.

Key Technical Points in Test Implementation

During test implementation, specimen preparation must strictly replicate the actual construction details of the project, including GRC panel thickness, reinforcement configuration, and installation joints. Leveraging its detailed design capabilities, Qinglong Group can reproduce curtain wall units 1:1 according to project drawings, ensuring consistency between specimens and the actual project. The loading process is carried out in graded increments, starting from 1.5 times the design wind pressure and rising step by step to 3 times the design wind pressure, while simultaneously monitoring the maximum panel deflection, anchoring system stress, and the interfacial bonding performance between glass fibers and the cement matrix. Notably, for double-curved GRC curtain walls with complex shapes, additional modal analysis is required to prevent fatigue failure caused by airflow resonance.

Industry Practice of the Full-Chain Quality Control System

As a National High-Tech Enterprise, Qinglong Group has established a full-process quality control system spanning from raw material testing to finished product acceptance. In the GRC curtain wall production stage, automated production lines enable precise control of fiber content (typically 4-5% by volume), ensuring a panel flexural strength of ≥12MPa. During the construction stage, BIM technology is used for pre-assembly simulation, combined with 3D laser scanning positioning, keeping installation errors within ±2mm. In recent years, projects Qinglong has participated in, such as the Century Plaza renovation project on Nanjing East Road, have all had their GRC curtain walls' wind pressure deformation performance certified by national-level testing institutions, with stable performance in long-term use in typhoon-prone regions, demonstrating the synergistic value of scientific testing and high-quality production.

Industry Trends and Technology Innovation Directions

With increasing building heights and more complex shapes, wind pressure deformation testing of GRC curtain walls is developing toward greater refinement and intelligence. Qinglong Group is developing a digital twin-based wind pressure simulation system that couples finite element analysis with physical test data to enable full life-cycle prediction of curtain wall performance. Meanwhile, drawing on the ultra-high strength properties of UHPC materials, it is developing a GRC-UHPC composite curtain wall system that reduces self-weight by 30% while increasing wind pressure load capacity, providing better solutions for super high-rise buildings. In the future, the industry will place greater emphasis on integrating testing standards with actual engineering scenarios, driving GRC curtain walls toward a higher level of balance between safety and economy.