2025-03-14    292

While reinforcement of reinforced concrete structures is common, steel structure reinforcement focuses on industrial facilities like cooling towers, factory buildings, and mezzanine floors. Primary methods include:

1. Load Reduction: Decrease structural stress by redistributing or reducing loads.

2. Structural Redesign: Modify the structural analysis model to optimize force distribution.

3. Section Strengthening: Increase cross-sectional dimensions or enhance connection strength of existing members.

4. Crack Control: Halt crack propagation through reinforcement or repair techniques.

5. Alternative Methods: Apply proven solutions tailored to specific damage scenarios.

Reinforcement Types

• Partial Reinforcement: Targets individual members or joints with insufficient capacity. Methods include:
  • Section enlargement
  • Member length reduction
  • Joint reinforcement

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• Comprehensive Reinforcement: Strengthens the entire structure through:
  • Original structural model adjustments
  • Support system enhancements (most effective and cost-efficient)
  • Cross-sectional upgrades (material- and labor-intensive but reliable)

Construction Approaches

1. Load-Bearing Reinforcement

• Applied when member stress < 80% of steel design strength and damage is minimal.

• Temporary load removal may be required for new components to engage.

• Ensures no disruption to adjacent structures.

2. Load-Removal Reinforcement

• Used for severely damaged structures or highly stressed components.

• Limits movable loads (e.g., crane beams) to simulate partial unloading.

3. Component Replacement

• For critical damage or inadequate original capacity.

• Requires temporary supports during removal and guarantees structural stability post-replacement.

Reinforcement strategies are determined through collaboration between designers and contractors, prioritizing safety, quality, and site-specific conditions.