How do steel structure buildings withstand extreme weather?

Release time:

2026-09-15

Enabling steel structure buildings to withstand extreme weather is a systematic undertaking that spans their entire lifecycle—from design and material selection to construction, operation, and maintenance......

Responding to low temperatures, rain, snow, and freezing conditions

Design Considerations:

Snow load values should be appropriately increased; for instance, regions like Heilongjiang have based their basic snow pressure calculations on a 100-year return period and—for the first time—introduced snow load amplification factors ranging from 1.2 to 1.7, categorized by load effect ratios.
Roof slopes should be increased, and snow-melting systems installed, to prevent structural deformation caused by the accumulation and weight of snow.
Thermal stresses resulting from significant temperature fluctuations—whether seasonal (winter vs. summer) or diurnal (day vs. night)—must be fully accounted for; design parameters should be based on daily maximum and minimum temperatures recorded over the past five years.

Operations and Maintenance:

Upon the issuance of extreme weather warnings, promptly organize scientific de-icing and snow removal operations to prevent excessive snow accumulation or the cumulative buildup of ice resulting from repeated freeze-thaw cycles.
Conduct snow removal in a balanced and orderly manner to avoid asymmetrical snow loads, prioritizing areas prone to accumulation such as eaves and gutters.
Pay close attention to structural members for severe corrosion and to roof supports for signs of loosening or deformation; immediately suspend use and evacuate the area if unusual noises or significant deformations are detected.

Coping with extreme heat

The impact of high temperatures on steel structures is primarily manifested in thermal stresses caused by thermal expansion and contraction.

Mitigation Measures:

Expansion joints and sliding bearings: Incorporate passive compensation devices—such as expansion joints, sliding bearings, and sliding connections—into the structure to allow for free deformation. For instance, the roof of the National Stadium ("Bird's Nest") features multi-directional sliding connections capable of accommodating thermal displacements of several centimeters.
Joint fatigue monitoring: Conduct regular inspections of critical connection points, such as welds and high-strength bolts, to prevent fatigue-related degradation caused by repeated thermal cycling.
Heat resistance of anti-corrosion coatings: Select high-temperature and UV-resistant anti-corrosion coating systems to prevent accelerated aging or peeling of the coating under high-temperature conditions.

Coping with Typhoons and Strong Winds

Wind-resistant design:

Increase structural cross-sections, enhance the overall wind resistance rating, and strengthen connection joints.
Utilize secure roofing attachment methods to prevent the roof from being torn off by typhoons.
Select door and window profiles with high wind-load resistance, such as thermal-break aluminum alloy systems.
Deepen and reinforce foundations to prevent loosening caused by wind and sand erosion.

The safety of steel structure buildings can be fully guaranteed provided that extreme weather conditions are adequately considered during the design phase—with appropriate materials and protective measures selected—and that regular inspections and emergency response protocols are effectively implemented during the operation and maintenance phase.

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