CHAPTER 3
DAMAGE SURVEY OF MISCELLANEOUS STRUCTURES
3.1
GENERAL
The damage caused by shots Mike and King of Operation Ivy to the various structures,
other than 3.1.1, located uo the Isianda of the b auwetow Atoll (Fig. 3.1) was observed and recorded. The structures consisted of heavily reinforced concrete shellers, both buried and
above ground, air-blast and thermal meac:>ing and recording stations, lightly constructed wood
and metal timing enacks, and other nuscellaneoue tiems.
The dc.mage observations tere cf & visual nature. Detailed measurem nis were made for
only two structures, where it appeared that it might be possible to an. lyze thelr dynamic behavior. One of trese was an overturned blast wall used to previous tesis to house blast-measuring instruments. A simp.e overiurning analysis of thie structure ts coolained in Appendix F.
Photographs were obtsined of all significant damage.
Because there were two atomic burets al different points in Queration tvy, there was an
overizp of the air-blast effects at some locations. In sor @ cases the Diaet-wave overpressures
{rom one shot were lnsignuiicant compared lo the overpreseures from the other shot, In these
Cases it wae apparent (at the larger overpreesure criesd the observed eumage. Al other lo-
cations the overpressures from bow shots were of the same order of mejoitude; in Unese Cases
the chserved damage would probably not have been caused by uie cheerved overpressure from
only cne of the shots
The labulaticn of the observed etructural damage, Table 81, Mista the
distances of each structure from the Ground Zeros fur both the Mike and turg shote with the
correcpending alr-blast overpreneures for each. A brief deacriptica of tro rrructure and the
dainaye caused to it te 2120 piven, along with relerences to the phoi.raphe and plans.
Tie Socalica of the structures with respect to the urwutel Zoros for the two atomic burats
were odtained from maps in refcrence 17. In macy cases the locattun us the ateucture on the
map was not given and had to be estimated The overpressures correrponaing to the disian .s
thus determined were cbtained from overpressure curves in reference 3,
.
Aummary of general damage onoservatior made as 2 result oi the damage survey ts con-
tained tn Sec. 3.2.
$3.2
SUMMARY OF CROSS-DAMAGE OBSERVATIONS
The gross damage observed at various points caused by shuts Mike and King of Operation
Ivy may be summarized as follows:
1. Al reinforced-coacrete semiburied instrumentatina shelters appeared to have performed their function satisfactorily without exhibiung any primary structural fatiures.
2. Of the many one-story reinforced-concrete surface and semiburied structures observed,
none were badly damaged. The only serious structural failures observed were confined to wing
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