Selected chapters from the German concrete yearbook are now being published in the new English 'Beton-Kalender Series' for the benefit of an international audience. The authors are extensively involved in the planning, design, operation and inspection of buildings for preservation and reconstruction, and in the updating of European Technical Approval Guidelines (ETAGs) and design rules. As it is planned to produce a document in a future Eurocode 2, the DAfStb guideline serves as a starting point. This is the first European guideline to regulate this topic in the form of a supplement to the Eurocode. The explanations and background information provided are mainly based on the new German guideline 'Strengthening of Concrete Members with Adhesively Bonded Reinforcement' by the German Committee for Structural Concrete (DAfStb). Concrete member strengthening measures can take the form of, for example, flexural strengthening with externally bonded (surface-mounted) CFRP strips, CF sheets and steel plates, flexural strengthening with CFRP strips bonded in slits (near-surface-mounted reinforcement), shear strengthening with externally bonded CF sheets and steel plates, and column strengthening with CF sheets as confining reinforcement. This book explains the design rules, together with their background, and uses examples to illustrate their use, specifically for slabs, beams and columns.

Existing concrete members can be strengthened by using adhesives to bond additional reinforcing elements onto or into those members. Design and construction in existing contexts is becoming increasingly important, and often the structures - sometimes of historical interest - can be preserved easily and at minimum cost by employing strengthening measures.

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