A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Structural safey of cracked concrete dams
Cracks and cracking in concrete dams can give a need to determine the current status from a dam safety perspective and an estimation on remaining service-life taking the cracks in to consideration. A comparison between the current status and the formal requirements should be made. Condition control is a prerequisite to define the current status and future development and to do this there is a need for knowledge on what type of cracks has occurred and the reason for cracking. To do this there is a need to combine observations, sampling, measurements and theoretical models/ analysis. A previous project within Dam Safety Interest Group (DSIG) resulted in a seven- step-method to analyse cracked concrete dams [1] and the current work is taking this forward to adapt the methodology to Swedish conditions. The goal has been to develop a Swedish guideline to define status and both current and future safety level for a cracked concrete dam with the purpose to create a uniform and reliable methodology for condition control and guidance for planning of measures. The disposition of the report is based on a management process with the parts REQUIREMENTS-INVESTIGATIONS-ANALYSIS-MEASURES and in the report also with REFERENCE PROJECTS exemplifying the recommendations given in the report. Recommended requirements for concrete dams can be found in the Swedish power industry guideline RIDAS [3], [4], with focus on water-tightness, stability, load-bearing capacity and limited deformations. Investigations is best performed stepwise from a visual inspection to a more or less detailed investigation with sampling depending on how unclear the conditions are regarding mechanical properties, crack extent, reason for cracks etc. The results are commonly used later when analysis is performed and therefore it is preferred to plan them in cooperation with the person that will do the analysis later.Analysis can be anything from simple behavior models via analytical calculations to advanced numerical simulations. The purpose with the analysis is ...
Structural safey of cracked concrete dams
Cracks and cracking in concrete dams can give a need to determine the current status from a dam safety perspective and an estimation on remaining service-life taking the cracks in to consideration. A comparison between the current status and the formal requirements should be made. Condition control is a prerequisite to define the current status and future development and to do this there is a need for knowledge on what type of cracks has occurred and the reason for cracking. To do this there is a need to combine observations, sampling, measurements and theoretical models/ analysis. A previous project within Dam Safety Interest Group (DSIG) resulted in a seven- step-method to analyse cracked concrete dams [1] and the current work is taking this forward to adapt the methodology to Swedish conditions. The goal has been to develop a Swedish guideline to define status and both current and future safety level for a cracked concrete dam with the purpose to create a uniform and reliable methodology for condition control and guidance for planning of measures. The disposition of the report is based on a management process with the parts REQUIREMENTS-INVESTIGATIONS-ANALYSIS-MEASURES and in the report also with REFERENCE PROJECTS exemplifying the recommendations given in the report. Recommended requirements for concrete dams can be found in the Swedish power industry guideline RIDAS [3], [4], with focus on water-tightness, stability, load-bearing capacity and limited deformations. Investigations is best performed stepwise from a visual inspection to a more or less detailed investigation with sampling depending on how unclear the conditions are regarding mechanical properties, crack extent, reason for cracks etc. The results are commonly used later when analysis is performed and therefore it is preferred to plan them in cooperation with the person that will do the analysis later.Analysis can be anything from simple behavior models via analytical calculations to advanced numerical simulations. The purpose with the analysis is ...
Structural safey of cracked concrete dams
Nordström, Erik (author) / Hassanzadeh, Manouchehr (author) / Malm, Richard (author) / Ekström, Tomas (author) / Janz, Mårten (author)
2019-01-01
2019:623
Paper
Electronic Resource
English
concrete , dams , dam safety , cracks , assessment , analysis , FEM , numerical modelling , repair , monitoring , Infrastructure Engineering , Infrastrukturteknik
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