Structural deformation control in bridge construction based on error analysis and correction.

Area of Science:

• Civil Engineering
• Structural Engineering
• Construction Management

Background:

• Bridge construction is susceptible to deviations from design due to environmental factors like temperature and time intervals.
• Maintaining structural alignment and safety is critical, necessitating precise deformation control during construction.

Purpose of the Study:

• To propose and validate a novel method for structural deformation control in bridge construction.
• To minimize elevation errors caused by temperature and time intervals using error analysis and correction.

Main Methods:

• Modeling cantilever deflection in the main girder, considering the influence of subsequent cantilevers.
• Calculating elevation errors due to temperature and time, employing linear minimum variance estimation for error reduction.
• Implementing the error analysis method through real-time measurement and comparison with design values during construction.

Main Results:

• The proposed method achieved elevation errors below 20 mm during construction.
• Post-completion elevation errors were reduced to less than 30 mm.
• The method ensured the bridge structure's linear shape and internal conditions met design requirements.

Conclusions:

• The developed error analysis and correction method effectively controls structural deformation in bridge construction.
• This approach enhances bridge safety and alignment by mitigating construction-induced errors.
• The technique provides a reliable framework for achieving design specifications in practical bridge engineering projects.