DAfStb guideline - Strengthening of Concrete Structures with Adhesively Bonded Reinforcement - page 9

reinforcement had been granted a national technical approval. Fire tests (see [43]) on
members with near-surface-mounted reinforcement and fire protection systems have
revealed that the protection of bonded reinforcement must satisfy much higher
requirements than is the case with conventional systems.

2.7 Relationship with other regulations
The DAfStb guideline for the strengthening of concrete members with adhesively
bonded reinforcement [1, 2] must be seen in the context of all national and European
standards that cover product, design and construction aspects. In principle, the
DAfStb guideline supplements DIN EN 1992-1-1 [20] and its associated National
Annex [21]. Strengthening requires an approved system with products to DIN EN
1504-1 [22]. In addition, design and construction work must take account of the
DAfStb guideline on the protection and maintenance of concrete members [23]. Every
contractor intending to perform strengthening measures must be properly quali ed,
which in Germany requires proof of suitability. Figure 2.1 provides a basic overview
of the DAfStb guideline in the context of the other European and German standards/
guidelines plus system approvals.
However, as many strengthening projects involve members that cannot be assessed
using the latest design codes, and concretes or reinforcing steels that do not comply with
current standards, it may be necessary to deviate from the framework of standards on
occasions. When as-built documents are available, the material parameters may be taken
from old standards, for instance, and converted to current reference figures by applying
suitable methods (see [45 48], for example).

In individual cases it will also be necessary to investigate whether the presence of
certain construction products, e.g. prestressing steel sensitive to stress cracking
corrosion (see [49

-

- 52], for example), represents a risk to the overall safety of the

member.

Fig. 2.1 The DAfStb guideline in the context of German and European design, product and
construction standards based on DIN EN 13670 [44], (non-exhaustive schematic diagram)