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Evaluation of Steel Targets
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DOE Standard Accident Analysis For Aircraft Crash Into Hazardous Facilities
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Energy-Balance Method.


DOE-STD-3014-96
Alternative formulas such as the Stanford Research Institute (SRI)
formula and the Hagg-Sankey formula can be used as applicable.
Global Response Evaluation.
6.3.3
a.
The objective of the global response evaluation is to determine if the
impact of the aircraft results in the excessive deformation or collapse of
the target structure. A localized collapse evaluation (i.e., the collapse of
a segment, a component, or a portion of the structure) may be sufficient if
it can be demonstrated that such a localized collapse would not adversely
affect the structure's function or the function of any systems or
components. Global response evaluation of a building or a structure
typically involves characterization of the nonlinear behavior of both the
aircraft and the target, including soil-structure interaction.
b.
Global response evaluation can be performed by either the energy-
balance method or the time-history analysis method. The energy-balance
method discussed in Section 6.3.3.1 can be used for global response or
collapse evaluation if the following conditions are met: (1) there are no
safety-related SSCs supported by the target in the vicinity of the impact;
(2) the configuration of the target is simple, such that the overall dynamic
characteristics of the structure can be adequately represented by a
single-degree-of-freedom (SDOF) nonlinear energy-absorbing system;
and (3) the resulting response of the SDOF system would be compatible
with the strength and ductility limits of the various components and
supports of the impacted structure. If these conditions are not met, then
the time-history analysis method described in Section 6.3.3.2, or in
Appendix C, Section C.6.3.3.2, should be used to evaluate the global
response.
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