Part B - Verifications and approval requirements 
61 
Reinforced concrete construction 
DIN EN 1992-1-1 
DIN EN 1992-1 -1/NA National Annex (Eurocode 2) 
Concrete 
DIN EN 206-01 and Amendments 1 and 2 
Further details with regard to considering cyclic loads on the foundation elements are regu 
lated in 
Appendix 3-II Verifications in the limit states of the foundation elements under con 
sideration of cyclic loads. 
3.3.2 Requirements and required verifications 
3.3.2.1 Safety verification concept and procedures, level of stability against collapse 
The geotechnical verifications pertaining to the stability of the subsoil, the foundation ele 
ments and their components shall be issued in accordance with the following principles: 
• The mechanisms of the expected interaction between the subsoil and the structure shall be 
represented and considered in the verifications for the foundation elements. 
• In all cases, a verification concept with characteristic subsoil parameters and partial safety 
factors on the load side and the resistance side (load and resistance factors) shall be used 
(GEO-2 verification process in accordance with DIN EN 1997). Deviations are permitted in 
justified cases (GEO-3 verification process in accordance with DIN EN 1997 or similar), in 
particular in cases where the interaction between the subsoil and the structure does not 
permit definitive separation between load and resistance or if the resistances are directly or 
indirectly dependent on external effects (e. g. shearing resistances of external loads). In 
such cases, a comparable level of stability against collapse shall be demonstrated. 
• The concept used to take account of the effects of cyclic loads shall be accordingly repre 
sented in the verifications. 
• The applicability of the verification process used shall be documented. Violations of the do 
cumented application limits shall be evaluated and documented. 
• To the extent that recognised verification processes are unavailable and a separate calcula 
tion model with calculation processes is designed, the model and the calculation process 
shall be presented in a way that permits it to be tested and be comprehensively documen 
ted. If the calculation results achieved through this method are not without doubt and no 
major safety reserves in the structure are indicated for the problem being dealt with, then 
the applicability of the model, the process itself and its assumptions in the application case 
shall be verified by a suitable measurement and observation programme on the structure. 
These measurements and observations form a necessary component of the verification and 
shall be presented as such together with the verification; this process corresponds to the 
“observation method” in accordance with DIN EN 1997 (EC 7), its elements shall be imple 
mented in full (please refer to Appendix 3-IV). 
• Deviations from the level of stability against collapse in accordance with DIN 1054 are basi 
cally permitted for considering the special conditions of the offshore situation; any such 
deviations shall be indicated and justified. Lower deviations from this level of stability 
against collapse shall require the approval of the BSH which may engage the services of a 
suitable assessor for this purpose. If different safety concepts and verification processes 
are used, equivalence of the safety statement shall be confirmed by an expert.