а)
А-А
b)
В-В
c)
Figure 4. Building overlapping construction of the ARKOS structural system:
a)
a fragment of the framing plan; b) the joint of the slabs with bearing girders of
rectangular cross section; c) slab joint between themselves;
b)
1 ‒ columns with through slots; 2 ‒ precast hollow-core slabs; 3 ‒ monolithic
bearing girders; 4 ‒ monolithic bracing girders; 5 ‒ the joints between the keys;
6 ‒ concrete keys; 7 ‒ key size limiter; 8 ‒ working reinforcement of girders;
9 ‒ concrete keys between the slabs
The joint characteristics of hollow-core slabs with ARKOS system bearing girders
are as follows: a multi-keyed connection with round keys, their number is determined
by the number of voids in the slab, key diameter
159
d
мм
=
, key depth
100
k
l
мм
=
,
class of the monolithic concrete C20/25.
The method of calculation proposed by the authors, in addition to the geometric
parameters of the joints and the strength characteristics of concrete, makes it possible
to take into account the level and location of the compression application (the value of
thrust).
According to experimental studies [4], an increase in compression σ from 0 to 0.5
f
c, prizm
the strength of keys increases up to 2.5 times, without altering the nature of their
destruction. There are a number of patents proposing to improve the joint of a slab with
a monolithic girder by reinforcing a key with flat or spatial cages. In PoltNTU, the
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