This report is concerned with a study of possibilities of
developing the reinforcement of sandwich facade elements
for the purpose of minimizing the detrimental effects
appearing primarily in the service state on the elements
subjected to indirect loading; the solutions applicable
in this respect to the truss reinforcement used between
the panels are introduced.
First in the study, behavior, manufacture and structure
of the types of walls most frequently being used in
Finland as well as loads taken by the walls are examined.
Furthermore, functions of the reinforcement in the
sandwich walls and functional requirements to be set for
the reinforcement are mapped.
Secondly, emphasis is placed on the different nature of
cracking caused by indirect loading, which differs e.g.
from that induced by external mechanical loads. In order
to clarify the cracking mechanism of this kind the
formation of cracks from the first crack to the
stabilization of cracks as well as the determination of
the crack distance and crack width by means of
calculations are discussed. Dimensioning of the desired
crack width is proposed to be carried out by means of the
curves, presented for the first time by Falkner in his
In conclusion, a proposal for developing the
reinforcement in panels and trusses is presented with the
results obtained from the laboratory tests on the
elements provided with the reinforcement conforming with
the proposed requirements.
|Place of Publication||Espoo|
|Publisher||VTT Technical Research Centre of Finland|
|Number of pages||69|
|Publication status||Published - 1981|
|MoE publication type||D4 Published development or research report or study|
|Series||Valtion teknillinen tutkimuskeskus. Tiedotteita|
- precast concrete
- sandwich structures