Temperature sensitivity analysis and service performance evaluation of aqueduct arch ring beam structures based on...

Area of Science:

• Civil Engineering
• Structural Engineering
• Materials Science

Background:

• Aqueduct arch ring beam structures are critical infrastructure.
• Understanding their temperature sensitivity is vital for long-term performance and durability.
• Environmental temperature fluctuations pose a significant risk to structural integrity.

Purpose of the Study:

• To investigate the temperature sensitivity and service performance of aqueduct arch ring beam structures.
• To develop and apply a thermal-structural coupling model for analysis.
• To provide quantitative assessment frameworks and engineering recommendations.

Main Methods:

• Comprehensive finite element analysis (FEA).
• Development of a thermal-structural coupling model.
• Evaluation of temperature field distributions and structural responses.
• Service performance assessment using a comprehensive model.

Main Results:

• Temperature-induced stresses reach 40-60% of allowable limits, concentrated at arch-beam connections.
• Seasonal temperature variations (58°C) cause significant thermal cycling, affecting durability.
• Arch crown experiences maximum temperature fluctuations and peak thermal stresses (4.5 MPa).
• Overall service performance rated as Good (73.0), with thermal fatigue resistance as a limitation.

Conclusions:

• Temperature variations significantly impact aqueduct arch ring beam structures.
• Thermal fatigue resistance and durability are critical performance limitations.
• Enhanced thermal protection and monitoring systems are recommended for improved design and maintenance.
• Findings support better strategies for water infrastructure under environmental temperature effects.