**2.3 Types, design diagrams and cases**

Based on the level of potential hazard, according to the legislation requirements and taking into account accidents occurrence risks, the abovementioned objects of a technosphere can be split in four (4) main groups (**Figure 5**) for each of which

• the objects subject to technical regulation (STR) with the main damages to

production sites and objects which safe operation is provided under the law on

• the critically important objects (CIO) which damages affect members of the

• the strategically important objects (SIO) which damages are followed by losses

For the continental shelf infrastructures, the number of the objects to be ana-

In the system of initial standards, specifications and guidelines used for design

SNiP 2.06.04-82\*, "Loads and impacts on hydrotechnical structures (waves, ice

VSN 41-88, "Industry Specific Code of Practice for design of offshore ice-

Recommended Practice for Planning, Designing, and Constructing Fixed Offshore Platforms – Load and Resistance Factor Design, АРI Recommended

GOST 27751-88 "Reliability of structural units and foundations. Basic

• the hazardous production facilities (HPF) with the main damages to

industrial safety—there are hundreds of thousands of such facilities;

corresponding safety requirements are provided:

to the country and the bordering states.

and calculations of SPs were included the following documents:

objects themselves;

*Probability, Combinatorics and Control*

Russian Federation; and

lyzed is reduced by one or two orders.

• Russian regulations database:

calculations methodology.", 1988;

and sea vessels)", 1995 & 1983;

• Foreign regulations database:

**Figure 5.**

**80**

Practice 2A-LRFD, 1993, Washigton;

SNiP 2.01.07-85 "Loads and impacts", 1996;

Marine Registry. FDR/OFR Guidelines, 2001;

resistant fixed platform (OIRFP)", М., 1988;

*Diagram of analysis of potentially hazardous objects of the technosphere.*

Implementation of the proposed recommendations and norms covers the structures with vertical and inclined sides, monopods and multicolumn constructions. In the documents, the rules of definition of the main loads conditioned by action of all potentially dangerous ice features subject to consideration are given. In **Figure 6**, the various structures design versions are presented.

The following loads are subject to analysis:
