Author:

Abstract:

The case study describe the strengthening of a damaged cylindrical reinforced concrete shed construction. A series of 25 cylindrical barrel shells are supported by 6 columns each. The overall span equals 15 meter in between the columns. A fork-lift hit one of the 6 meter high reinforced concrete columns which caused a vertical displacement of 8 cm of the column and severe cracking of the supported s hells. As lengthening of the structure was needed to avoid collapse of the total structure. Therefore, the stress situation is analysed with a FEM model. In comparison with the undamaged situation, membrane forces, shear forces and mo men is strongly increased. Especially, the membrane tensile forces in the longitudinal direction of the barrel shells would become extremely high, which correspond to the actual damage state. The FEM-Analysis - demonstrates that a compressive arch is formed in the barrel shell to span the displaced and settled support. An additional tensile member of extern ally bonded CFRP. glued at the side of the concrete barrel, provide the tensile member to that arch This case-study illustrates the load distribution mechanisms in the shell structure, the assessment of the actual condition and the intervention based on externally bonded reinforcement.