Investigates temperature influence on the mechanical behavior of prestressed concrete beams, indicating key insights for construction control.
Key Points
The research aims to assess the mechanical performance of a composite tensioning system and understand the impact of temperature variations on prestressed concrete beams.
Implemented a temperature monitoring system with high-precision sensors during key construction stages.
Collected synchronized data on temperature and displacement during tensioning, pouring, and curing.
Validated finite element models using field-measured data under various thermal load conditions.
Temperature differences of 12.0 °C observed at the end form, resulting in a maximum displacement of 0.2 mm at the anchor plate.
Temperature changes of 22 °C lead to prestress fluctuations between 0.12% and 0.3%.
The numerical model showed high accuracy, with an error of less than 7.5% compared to experimental data.