Key Points for Load-Bearing Calculation of Suspended GRC Shapes?

In the field of modern architectural decoration, suspended GRC shapes, with their lightweight high-strength properties and rich design versatility, have been widely applied in high-end projects such as grand theaters, commercial complexes, and landmark buildings. However, their load-bearing safety directly affects the overall structural stability and safe use of the building, making it a core consideration in both design and construction. As an industry leader with 28 years of experience in detailed design, manufacturing, and construction of UHPC/GRC/GRG/GRP materials, Qinglong Group draws on its practical experience participating in the formulation of the Technical Standard for Building Application of Glass Fiber Reinforced Cement (GRC) (JGJ/T423-2018) to provide you with a systematic analysis of the key technologies for load-bearing calculation of suspended GRC shapes.

### 1. Core Elements and Load Analysis of Load-Bearing Calculation for Suspended GRC Shapes

The load-bearing calculation of suspended GRC shapes must be based on a precise understanding of material properties and load types. GRC material is composed of glass fibers and cement-based composites, with a flexural strength of over 20MPa and a density only 1/4 that of traditional stone, which provides the foundation for large-span and complex suspended installations. The loads to be considered in the calculation mainly include: permanent loads (self-weight of GRC components and weight of connectors), variable loads (wind loads, seismic action, and temperature stress), and accidental loads (construction and maintenance loads). For example, in typhoon-prone areas, wind loads should be taken as 0.5-1.5kPa according to the Load Code for the Design of Building Structures, while seismic action requires dynamic analysis based on the seismic fortification intensity of the project location. The component testing center at Qinglong Group's Nanning production base can simulate structural responses under various load conditions with professional equipment, providing data support for the calculations.

### 2. Component Self-Weight Calculation: From Material Mix to Structural Optimization

Component self-weight is the starting point of load-bearing calculation for suspended GRC shapes and must be precisely calculated in light of shape complexity and material formulation. Standard GRC panels typically have a density of 1800-2200kg/m³; by adjusting the glass fiber content (usually 4-6%) and aggregate grading, self-weight can be reduced while maintaining strength. For special-shaped components (such as double-curved surfaces and openwork reliefs), 3D modeling software (such as Rhino and Grasshopper) must be used for volume segmentation calculations to avoid load superposition risks caused by estimation errors. Qinglong Group's BIM detailed design team can achieve refined breakdown of component self-weight through parametric modeling, ensuring that the weight data of each GRC unit is accurate to the kilogram level, providing a reliable basis for subsequent anchoring design. For more industry information: +WeChat qlfsbl123

### 3. Anchoring System Design: Ensuring the Safety of Connection Nodes

The anchoring system is the key load transfer path for the load-bearing of suspended GRC shapes, and its design must balance load-bearing capacity with deformation adaptability. Common anchoring methods include back-bolt, embedded insert, and combined types. The calculation must verify the tensile load-bearing capacity of connectors (e.g., the tensile strength of stainless steel back bolts should be ≥30kN), the pull-out failure load of the concrete substrate, and the local compressive strength of GRC components at the joints. In the Dongguan Women and Children's Activity Center project, Qinglong Group innovatively adopted a "three-dimensionally adjustable embedded insert + elastic gasket" design, using finite element analysis software to simulate the displacement response of joints under wind vibration loads, ensuring that the anchoring system maintains stable load-bearing within a deviation range of ±50mm. In addition, for suspended shapes exceeding 50m in height, additional stress caused by temperature deformation must also be considered, with constraints released by installing sliding joints.

### 4. Structural Verification and Engineering Practice: Full-Process Control from Theory to Implementation

The load-bearing calculation of suspended GRC shapes must be verified through multi-level calculations to ensure safety, including verification of the flexural load-bearing capacity of components (according to the GRC Decorative Products JC/T940-2022 standard), verification of the overall stability of the anchoring system, and verification of the fatigue strength of connection joints. As a national high-tech enterprise with a provincial-level engineering technology center, Qinglong Group relies on its self-developed structural calculation software to achieve full-process simulation from material performance parameters to overall structural response. In the Nanjing East Road Century Plaza renovation project, for the suspended system of the translucent GRC curtain wall, a 1:1 full-scale model loading test verified the structural safety under 1.2 times the design load, and the related technical achievements won the Silver Award of the AALBORG WHITE Cup UHPC Construction Engineering Innovation Award. For complex projects, it is recommended to carry out collaborative design together with structural engineers and, where necessary, engage third-party testing institutions to verify load-bearing capacity, ensuring consistency between calculation results and engineering practice.

### 5. Industry Experience Summary: Three Principles of Load-Bearing Calculation

Drawing on 28 years of industry practice, Qinglong Group has distilled three principles for the load-bearing calculation of suspended GRC shapes: "safety redundancy, dynamic adaptation, and full life cycle". Regarding safety redundancy, the design load-bearing capacity of critical components should be no less than 1.5 times the calculated value; regarding dynamic adaptation, factors such as construction tolerances and material shrinkage must be considered, with a 5-10% load adjustment margin reserved; regarding the full life cycle, regular inspection (such as annual torque re-checking of anchoring parts) and maintenance ensure long-term stable load-bearing performance. As a vice-chairman unit of the China GRC Association, Qinglong Group, with an attitude of "meticulousness and constant refinement", is committed to providing designers and owners with full-chain, expert solutions from detailed design to after-sales maintenance, helping suspended GRC shapes achieve a perfect balance between safety and aesthetics. For more industry information: +WeChat qlfsbl123