How to Test the Wind Pressure Deformation Performance of GRC Curtain Walls and Analysis of Key Testing Points

In modern building curtain wall projects, GRC curtain walls have become the material of choice for many landmark buildings thanks to their lightweight, high-strength, and flexible styling. However, as the "outer garment" of a building, a curtain wall's wind pressure deformation performance directly affects building safety and service life. As an industry leader with 28 years of full-chain experience in UHPC/GRC/GRG/GRP materials, Qinglong Group will provide professional insights for designers and owners from two aspects: testing methods and key points.

Standards and Methods for Testing the Wind Pressure Deformation Performance of GRC Curtain Walls

Testing of the wind pressure deformation performance of GRC curtain walls must strictly follow the Technical Standard for Building Applications of Glass Fibre Reinforced Cement (GRC) (JGJ/T423-2018). Testing is usually carried out in a professional laboratory, where a static pressure chamber simulates different wind pressure levels and displacement gauges measure the maximum deformation of curtain wall specimens under positive and negative pressure. Qinglong Group's production base in Nanning, Guangxi is equipped with advanced mechanical performance testing equipment, enabling full-process quality control of GRC components from raw materials to finished products and ensuring the accuracy and authority of test data.

Analysis of the Three Key Points in Wind Pressure Deformation Testing

1. Specimen Design and Installation Simulation: The test specimen must fully replicate the curtain wall structure in the actual project, including the connection method between the GRC panels and the supporting frame. Qinglong adopts BIM technology for joint simulation at the detailed design stage to ensure that the specimen's stress state is consistent with actual installation, avoiding distorted test results caused by differences in boundary conditions. For example, in a commercial complex project, by accurately simulating the stiffness of the bolted joints, the deviation between test data and on-site wind pressure testing was kept within 5%.

2. Graded Loading and Deformation Monitoring: Testing requires loading step by step according to wind pressure levels and recording the deformation curve at each pressure level. Particular attention should be paid to the critical point between elastic and plastic deformation, which is directly related to the long-term weather resistance of GRC materials. Qinglong's GRC curtain wall panels achieve a flexural strength of over 20MPa and retain elastic recovery even under 1.5 times the design wind pressure, far exceeding the industry average.

3. Sealing Performance and System Coordination: Wind pressure deformation involves not only the panels themselves but also the coordinated action of the sealing strips and the anchoring system. Qinglong uses customized sealing solutions in production, combined with 3D laser scanning technology to ensure installation precision, so that the curtain wall system maintains good water and air tightness under cyclic wind pressure loads.

As a National High-Tech Enterprise and a participant in formulating GRC industry standards, Qinglong Group has always been committed to its mission of "creating aesthetic architecture", integrating 28 years of engineering experience into every aspect of its GRC curtain walls. From material formulation optimization to construction process innovation, and from laboratory testing to on-site operation and maintenance support, Qinglong provides customers with full life-cycle solutions. Whether for super high-rise landmarks or complex irregular-shaped buildings, choosing Qinglong GRC curtain walls means choosing the dual guarantee of safety and aesthetics. Looking ahead, Qinglong will continue to deepen its expertise in the UHPC/GRC/GRG/GRP materials field, driving the high-quality development of the building decoration industry through technological innovation.