Prediction of Temperature Induced Crack Patterns in Cylindrical Concrete Structures
K. Van Breugel an C. Van Der Veen
Appears on pages(s):
chimneys; cracking (fracturing); crack width and spacing; partial prestressing; prestressed concrete; reinforced concrete; reservoirs; serviceability; silos; temperature; thermal gradient; thermal stresses; towers; walls; Structural Research
An analytical procedure is described for predicting 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 cylinders. Mathematically obtained crack patterns have been compared with field observations: a good agreement between theory and practice could be established from this comparison. On the basis of a reliable prediction of crack 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 crack control to be preferable to repair (grouting) of cracks.