Structural Optimization of Steel Tubular Trusses in Smart Parking Garages

Steel tubular trusses in smart parking garages are lightweighted through topology optimization. A bidirectional grid system is constructed using Q355B steel tubes (e.g., ∅89x4). The member layout is optimized using the ground structure method, reducing redundant components by 15%-20% while meeting the load requirements (5kN/m²) for standard 8m×8m parking spaces. Truss nodes are fabricated using intersecting welding techniques, combined with BIM technology for pre-assembly, ensuring construction accuracy of ±2mm.

Lateral displacement resistance and modular design improve parking efficiency. Drawing on the bidirectional force transmission principle of plate trusses, V-shaped braces are installed around the core tube to control lateral displacement due to wind load (0.5kN/m²) within H/400. Standardized segmented trusses (each section ≤10m) are combined with a lifting and traversing system to achieve vehicle storage and retrieval times ≤90 seconds, increasing material utilization by 30%.