<s>
Structural	B-Algorithm
elements	I-Algorithm
are	O
used	O
in	O
structural	B-Algorithm
analysis	I-Algorithm
to	O
split	O
a	O
complex	O
structure	O
into	O
simple	O
elements	O
.	O
</s>
<s>
Structural	B-Algorithm
elements	I-Algorithm
can	O
be	O
lines	O
,	O
surfaces	O
or	O
volumes	O
.	O
</s>
