Pbkp_rediction of temperature induced crack patterns in cylindrical concrete structures

Abstract:

An analytical procedure is described for pbkp_redicting the development of vertical cracks in thin-walled and thick-walled cylindrical structures subjected to membrane forces and thermal loads. Sustained, axisymmetrical (thermal) loads and thermal cyclic loading may jeopardize, due to cracking, the serviceability, in this case the tightness, of thin-walled reinforced reservoirs for storage of warm water (25° to 30°C). Non-axisymmetrical thermal loads induced by solar radiation and thermal eigen-stresses significantly affect the crack pattern in thick-walled cylinders. Mathematically obtained crack patterns have been eompared with field observations: a good agreement between theory and praetice could be established from this comparison. On the basis of a reliable pbkp_rediction of erack patterns, cost-benefit analyses are feasible to weigh crack control measures against possible repair costs in case these measures were neglected. An example of such an analysis shows an initial increase of reinforcement in view of erack control to be preferable to repair (grouting) of cracks.

Año de publicación:

1989

Keywords:

• Crack width and spacing
• reinforced concrete
• Cracking (fracturing)
• Partial prestressing
• serviceability
• Chimneys
• Thermal gradient
• Reservoirs
• Walls
• TEMPERATURE
• Thermal stresses
• Towers
• prestressed concrete
• SILOS

Fuente:

scopus