1. Introduction: Welding Deformation Problems in Stereo Garage Construction
Stereo garages rely heavily on channel steel frame structures.
Channel steel beams act as key horizontal load-bearing components.
On-site assembly and welding are the main construction methods.
Welding heat inevitably causes beam bending and angular deformation.
Uncontrolled deformation leads to assembly deviation and safety risks.
Many construction teams ignore the importance of welding sequence.
Improper welding order increases correction workload and costs.
Reasonable sequence control is the low-cost way to reduce beam deformation.
2. Structural Characteristics of Stereo Garage Channel Steel Beams
2.1 Section Structural Features
Channel steel has asymmetrical open-section structure.
Uneven heat conduction during welding process.
Prone to lateral bending and torsional deformation.
2.2 Mechanical Working Conditions
Bear long-term vehicle load and equipment vibration.
High requirements for flatness and structural stability.
Minor deformation will affect overall frame assembly accuracy.
2.3 Welding Construction Difficulties
Multi-node and multi-directional welding connections.
Centralized heat input easily causes cumulative deformation.
3. How Welding Sequence Causes Beam Deformation
3.1 Local Heat Accumulation
Continuous single-side welding leads to concentrated high temperature.
Uneven thermal expansion produces unbalanced shrinkage force.
Finally causes beam bending toward the welding side.
3.2 Residual Stress Superposition
Disordered welding order accumulates internal residual stress.
Stress release after construction leads to later deformation.
Affects long-term stable operation of stereo garage frames.
3.3 Asymmetric Shrinkage Difference
Unsequenced welding causes inconsistent cooling speed.
Different shrinkage degrees on two sides of channel steel beams.
Produces torsion and horizontal deflection deformation.
4. Comparison of Different Welding Sequence Effects
4.1 Continuous Sequential Welding
Simple one-way continuous welding saves construction time.
But it causes the largest beam deformation and residual stress.
Worst flatness accuracy for stereo garage beams.
4.2 Jump Interval Welding
Adopt spaced jump welding for dispersed heat input.
Effectively reduces local temperature accumulation.
Controls bending deformation within small range.
4.3 Symmetrical Balanced Welding
Weld symmetrically on both sides of channel steel beams.
Balances thermal shrinkage force on left and right sides.
Obtains the minimum deformation and highest flatness.
5. Optimized Welding Sequence for Garage Channel Steel Beams
5.1 Overall Welding Principle
Follow symmetry, dispersion and balanced heat input rules.
Avoid continuous long-distance single-side welding.
Priority to balance stress rather than blind speed.
5.2 On-Site Operation Steps
Complete symmetrical positioning welding first to fix beam position.
Adopt jump welding for long-span channel steel beams.
Alternate welding on both sides to offset shrinkage stress.
Finish middle sections first, then weld two ends.
5.3 Auxiliary Deformation Control
Match low-current and fast welding parameters.
Cooperate with segmented cooling to reduce heat impact.
Fix beams with fixtures before formal welding.
6. Practical Engineering Benefits of Sequence Optimization
Greatly reduces beam bending and torsion deformation.
Minimizes manual correction and flame shaping work.
Improves frame assembly accuracy and installation efficiency.
Reduces residual stress and prolongs frame service life.
Guarantees stable bearing capacity of stereo garage structure.
Saves overall construction cost and shortens project cycle.
7. Common Construction Mistakes to Avoid
Pursuing speed and adopting one-way continuous welding.
Ignoring symmetrical welding for two-sided beam joints.
Overly concentrated welding seams in local beam sections.
Lack of positioning welding before formal welding construction.
8. Conclusion
Welding sequence is a key factor affecting channel steel beam deformation.
Disordered welding causes bending, torsion and residual stress problems.
Symmetrical, spaced and balanced welding sequence effectively controls deformation.
For stereo garage frame construction, sequence optimization is simple and efficient.
It improves installation accuracy and structural safety without extra investment.
Standardizing welding sequence is an essential technical upgrade for high-quality garage engineering construction.
The above content was generated by AI assistance.
