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

Load-bearing calculation for suspended GRC shapes is a core element in ensuring their long-term safety of use, requiring comprehensive consideration of multiple factors such as "self-weight, wind load, seismic action, temperature stress, and accidental loads." The calculation and analysis must be performed by professional structural engineers. When undertaking various large-scale suspended GRC projects, Qinglong Group strictly follows the process of "load calculation, connection design, and finite element verification" to ensure that every suspension system is safe and reliable.

The cornerstone of load-bearing calculation is accurately computing all types of loads. The first is dead load, i.e., the self-weight of GRC components, insulation layers, and supporting keels. The second is live load, mainly wind load, which must be calculated based on the basic wind pressure, building height, shape coefficient, and wind vibration coefficient at the project location; particular attention should be paid to the effect of negative wind pressure (suction), which is often the governing load. For seismic zones, horizontal seismic action must also be calculated. In addition, temperature stress caused by the difference in linear expansion coefficients between GRC and the main structure must be considered. Qinglong's technical team collects detailed base data and designs with the most unfavorable load combinations.

The design calculation of connection nodes is of vital importance. The weak points of a suspension system usually lie in the connections, and the following key positions must be verified: 1) Embedded parts in GRC panels: verify their load-bearing capacity under tension, shear, and combined tension-shear forces, as well as concrete cone failure. Qinglong typically uses certified high-strength stainless steel undercut anchors. 2) Connection between hangers and keels: verify the shear and tensile capacity of the hangers, and the bolt shear and bearing capacity at the slotted holes. 3) Connection between keels and the main structure: verify the pull-out capacity of post-installed anchors or embedded parts, taking into account the strength of the concrete substrate. The safety factor of all connections must meet code requirements (usually no less than 3.0).

Finite element analysis is an important means of design optimization. For suspended shapes with complex forms and unclear force conditions, Qinglong establishes three-dimensional finite element models for static analysis and modal analysis. The analysis allows intuitive visualization of the stress distribution, identification of potential danger points, and reinforcement of weak areas, such as locally increasing thickness, adding stiffening ribs, or adding embedded parts. At the same time, it analyzes whether the deformation of components is within the allowable range, avoiding excessive deformation that affects use or causes visual discomfort. Through precise calculation and simulation, Qinglong provides a solid safety guarantee for every suspended GRC shape.