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

The load-bearing calculation of suspended GRC shapes requires comprehensive consideration of self-weight, wind load, seismic action, and thermal stress. Based on experience from multiple cantilevered projects, Qinglong Group recommends a safety factor of 2.5, deflection control ≤L/250, and tensile pull-out force at connection points ≥10kN.

Load combinations form the basis of calculation. Dead load (GRC self-weight) is calculated at a density of 20kN/m³, and live load is taken as 0.5kN/m². Wind load is based on a 50-year return period, with the shape coefficient determined through wind tunnel testing. In a pedestrian bridge project in Shenzhen, Qinglong Group used finite element analysis to optimize a GRC canopy structure cantilevered 6m, keeping the maximum stress below 8MPa.

Connection design is a critical element. Suspension points use post-installed undercut anchors with a tensile pull-out force ≥15kN. In the lobby ceiling project of the Liyuan Hotel in Nanning, the point load was reduced to below 5kN by increasing the density of suspension points. A combination of rigid and flexible connections is adopted to accommodate thermal deformation. A regular inspection system ensures long-term safety.