Abstract
This study investigates convenient methods of determination of temperature gradient of slender structures in time. Correct determination of temperature along the height of the cross-section takes a key role in defining the temperature loading of slender bridge structures. A proper definition of temperature loading is crucial for structures such as stress ribbon because of their sensitivity to temperature change in terms of geometrical changes of the structure. Correct determination of the temperature gradient is important during long-term geodetic monitoring, which might be used to prove the correctness of computational models of bridge structures. To approximate heat transfer in cross-section, a test specimen with temperature sensors installed along the height was formed and continuously monitored. The accuracy of the retrofitted temperature sensors was also investigated. The temperature at the surface of the specimen, solar radiation and wind velocity were used as input data for heat transfer analysis. The measured values from sensors situated along the height were subsequently used for verification of performed heat transfer analysis on volume computational model in the software Ansys Mechanical.
Highlights
Cable-supported structures like stress ribbon or suspension bridge are frequently used in modern architecture because of their clean design and the possibility of forming independently from existing terrain
For the structurally and statically more complex structures like pedestrian bridges with slender decks supported by cables, a combination of temperature loading and restraining of free deformation plays a key role for static analysis
Description of the examined stress ribbon structures In order to verify the computational model of the structures such as stress ribbon structures or suspension pedestrian bridges, it is necessary to correctly evaluate the geodetic surveying of the bridge
Summary
Cable-supported structures like stress ribbon or suspension bridge are frequently used in modern architecture because of their clean design and the possibility of forming independently from existing terrain. For the structurally and statically more complex structures like pedestrian bridges with slender decks supported by cables, a combination of temperature loading and restraining of free deformation plays a key role for static analysis. Precision and accuracy in geodetic surveying can measure the exact sag of the structure, the geometry of cable-supported structures is very sensitive to the surrounding temperature and whether or not the solar rays reach its surface. These and other conditions affect the temperature along the height of the deck and can cause incorrect evaluation of geodetic surveying.
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