I. Core Wind Resistance Advantages

Aerodynamic optimization design

Streamlined cross-section: flat multi-chambered steel box girder is adopted, with wind resistance coefficient Cd ≤ 0.25 (verified by wind tunnel test), which reduces the wind load by 30% compared with the traditional H-beam;

Wind guide plate design: Curved wind guide plate is set at the end of the beam to inhibit vortex-excited vibration, and the critical wind speed is ≥80m/s (EN 1991-1-4 standard).

Ultra-high strength materials

Q420qE bridge steel: yield strength ≥420MPa, tensile strength ≥540MPa, -40℃ impact work ≥47J (GB/T 714 standard);

Weathering-resistant steel (Q355qNH): salt spray test ≥5,000 hours without red rust, 50 years free of painting and maintenance (ISO 9223).

Structural rigidity and stability

Closed section torsion: torsional stiffness ≥5×10^6 kN-m²/rad, suppressing wind-induced torsional vibration;

Internal stiffening ribs: transverse diaphragm spacing ≤3m, longitudinal stiffening rib height ≥1/10 of web height, preventing local buckling.

Fast construction and long life

Modular prefabrication: Maximum single section length is 40m, weight is 1,200 tons, and it can be installed once by floating crane at sea;

Anti-corrosion and fire protection double guarantee: hot dip galvanized (zinc layer ≥85μm) + intumescent fireproof coating (3 hours fire resistance limit), design life ≥100 years.

II. the core product series and technical parameters

III. Key Wind Resistance Technologies

Wind load simulation and optimization

CFD fluid simulation: optimize the cross-section shape based on ANSYS Fluent to reduce the uneven distribution of wind pressure;

Wind tunnel test: 1:50 scaled-down model test to verify wind-induced vibration performance such as chattering and vortex vibration.

Dynamic Damping System

Tuned mass damper (TMD): mass block 50-500t, frequency matching error ≤2%, damping efficiency ≥40%;

Viscous dampers: output force 1,000-10,000kN, displacement ±300mm, reduce wind vibration response by 30%.

Connection and node technology

High-strength bolt connection: 10.9S grade bolts, preload error ≤±5%, anti-slip coefficient ≥0.45;

Full-penetration weld: robot narrow gap welding, UT flaw detection Ⅰ qualified rate ≥ 99.5%.

Contact

Mobile number: 13848510731

Landline number: 0471-6490861

Address: Inside the courtyard of the Outer Transport Company, diagonally opposite the government of Haoqinying Town, Xincheng District, Hohhot City, Inner Mongolia (National Highway 110)