Environmental Engineering Reference
In-Depth Information
Examples of General Requirements
Structures, foundations, and nonstructural components shall be designed
by analysis or by a combination of analysis and testing to provide a per-
formance not less than as stated below when they are subjected to the
influence of operating, environmental, and accidental loads. Consider-
ation shall be given to uncertainties in loading and in resistance.
Analysis shall employ rational methods based on accepted principles
of engineering mechanics and shall consider all significant sources of
deformation and resistance. Assumptions of stiffness, strength, damp-
ing, and other properties of components and connections shall be based
on approved test data or referenced standards.
Testing used to substantiate the performance capability of structural
and nonstructural components shall accurately represent the materials,
configuration, construction, load intensity, and boundary conditions
expected. Where an approved industry standard or practice that governs
the testing of similar components or materials exists, the test program
and determination of design values shall be in accordance with that
industry standard or practice.
Examples of Functional Requirements
The examples below are provided for illustrative purposes only.
1. Offshore wind turbines and electric service platforms shall have a
service life of at least _____ years (e.g., at least 20 years).
2. Site-specific environmental conditions shall be used for design.
3. The primary structures (foundations, superstructure, platforms,
blades, nacelle supports, etc.) shall be designed and constructed so
that the probabilities of falling short (during their service life) of
limit states associated with deflections, ultimate strength, loss of sta-
bility (buckling), and fatigue are sufficiently small for each individ-
ual structure as well as for the fleet of structures (typically installed
near one another) that make up an offshore wind farm.
4. The probability, given the design-basis event, of collapse of primary
structures (towers, platforms, blades, nacelle supports, etc.) within a
wind energy-generating facility shall not exceed ___ (e.g., shall not
exceed 10 percent).
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