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In the light of the temperature crack problem of the construction of RCCD during cold winter season, the authors have analyzed the dam cracking site and the cracking mechanism. Pointed out that the early autogenous volume deformation and temperature difference between inside and outside of the bedding concrete and the temperature difference of basis concrete are the main reasons resulted in the crack...
Thermal load is a main load just inferior to water pressure. Thermal creep stress is an important stress reference data of hydropower engineering design, and it is the important design criterion of preventing cracking. Crack will appear if thermal creep stress is beyond the allowable thermal creep stress of corresponding age of concrete, which will affect the safety of dam. Xiaowan concrete arch dam??s...
We report on the design and experimental validation of a distributed Brillouin-based optical fiber sensor embedded into concrete structures for temperature and strain measurement. A composite-made wave-like coating designed by finite-element analysis ensures the sensor is transferring optimally temperature and strain fields from the concrete to the optical fiber, where Brillouin scattering takes place...
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